Abstract

In this work, we developed a simple molecule with the effective generation of intense green emission in the amorphous thin-film. The synthesized novel molecule with excited-state intramolecular proton transfer (ESIPT), 3-Dimethylamino-1-(2-hydroxy-phenyl)-propenone (DHP), shows significantly enhanced green fluorescence in solid-state (fluorescence quantum yield Φf = 0.53), compared with the faint emission in the solution (Φf = 0.037). DHP molecules in amorphous thin-film effectively reinforce the radiative decay pathway, evidenced by enlarged Φf, shortened excited state lifetime τ. Taking advantage of the solid-state-induced emission enhancement characteristics, four-level ESIPT photocycle process and large Stokes shift, an efficient amplified spontaneous emission at 559.14 nm with a threshold of 12.41 mJ/cm2 is observed from the solid-state thin-film.

© 2019 Optical Society of America under the terms of the OSA Open Access Publishing Agreement

1. Introduction

Organic fluorescent emitters have received great attention due to their application potential in the field of organic light-emitting diodes (OLEDs) [1], fluorescent sensors [2], bioimaging [3], and organic lasers [4]. However, many conventional low-molecular-weight fluorescent molecules are subjected to weakened or quenched fluorescence emitting in aggregated states such as in solid-state thin-films (actually the favorable forms in optoelectronic devices application). In general, this behavior is defined as aggregation-caused quenching (ACQ) which originates from strong intermolecular interaction such as π- π stacking to decrease radiative decay rate [5]. Therefore, the frustrating results greatly hinder the applications of materials in organic solid-state lasers (OSLs). In the last decade, researchers have made much effort directly to alleviate the ACQ behavior in solid-state for organic emitters. Finally, some novel class of organic molecules have been developed based on, e.g., siloles [6], arylethylenes [7] and cyanostilbenes [8], demonstrating so-called aggregation-induced (enhanced) emission [9–11]. Besides, for organic emitters, the weakened fluorescence emitting inducing by self-absorption is a long-standing problem for OSLs applications as well. Generally, in organic semiconductor molecules, light can excite the molecule from its ground state to an vibrational level in the excited-state, followed by rapid relaxation to the bottom of the excited-state manifold. Then, lasing usually takes place from the zero-point vibrational level in the first excited-state to a vibrational level in the ground-state, followed by vibrational relaxation as well. The photocycle process behave as a quasi-four-level system [4]. Because of the small Stokes shift derived from the quasi-level system, organic semiconductor molecules suffer from severe self-absorption waveguiding loss, resulting in high lasing thresholds [12]. For organic molecules, in fact, some strategies have been proposed to overcome self-absorption by enlarging Stokes shift, for example, molecules with enhanced molecular rotation, enhanced intramolecular charge transfer, and intermolecular charge-transfer (CT) states, doped organic molecules with appropriate acceptors, molecules with excited-state intramolecular proton transfer (ESIPT) characteristics [13–16]. Among these, ESIPT molecules achieve tremendous attention due to their diverse structures and the largest achievable Stokes shift.

Above all, the suppressed fluorescence quenching and enhanced Stokes shift are essential for the realization of OSLs with outstanding amplified spontaneous emission (ASE) characteristics, which is the prerequisite of lasers. On account of the four-level cyclic scheme of enol (E)-keto (K) phototautomerization process, see Fig. 1(a), ESIPT have large Stokes shift and can avoid self-absorption behavior [17]. However, reported ESIPT molecules show high fluorescence emission in solution but weak fluorescence emission in the solid-state [18–20]. Recently, solid-state emitters with high fluorescence quantum efficiencies have been widely used in the field of optoelectronic devices and laser applications [21–24]. Here, we developed an ESIPT molecule with the intramolecular hydrogen bond between O-H∙∙∙O, 3-Dimethylamino-1-(2-hydroxy-phenyl)-propenone (DHP), which is an essential structural motif for the ESIPT molecules. DHP showed faint green emission in CHCl3 solution with Φf = 0.08, however, greatly enhanced ESIPT fluorescence (Φf = 0.53) was observed from its doped amorphous film. For many reported ESIPT molecules, ASE was observed in single crystal thin-films [14,25–28], by comparison, the solid-state-induced fluorescence emission enhancement for DHP promote the occurrence of ASE behavior in thin-film for the compound dispersed in the inert host at a rather large (33 wt%) chromophore concentration.

 

Fig. 1 (a) Schematic diagram of ESIPT photocycle. (b) Normalized absorption (blue) and emission spectra (green) in CHCl3 (1 × 105 M) and emission spectra (red) for doped thin-film of DHP. The inset demonstrates the chemical structure of DHP.

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2. Experimental section and theoretical methodology

The molecules were dissolved in chloroform (CHCl3) with 1 × 105 M. In addition, we spin-coated the thin-film doped with polystyrene (PS) in a certain amount (33 wt%) of DHP onto quartz substrate. We used UV-Vis spectrophotometer (HITACHI U-3010, Japan) and Fluorescence Spectrometer (fluoromax-4 spectrofluometer) respectively to obtain the absorption and photoluminescence (PL) spectra. For ASE measurements, the thin-film sample was photopumped at normal incidence with strip light, The pump light came from a pulsed Nd:YAG laser (5.55 ns, 10 Hz) (Surelite I, Continuum Corp, USA), using the third harmonic (355 nm). The emitted light waveguided by thin-film was collected with Fiber Optic Spectrometer (Ocean Optics SpectraSuite, USB2000). In addition, we achieved the PL quantum yield (Φf) for 150 nm thickness doped films of the investigated molecule using an integrating sphere with an absolute PL quantum yield measurement system (Hamamatsu C11347). At the same time, PL transient decays were measured for the solution and thin-film samples using a time-correlated single photon counting system (Edinburgh FLS980) with excitation at 375 nm. All the measurements were carried under air.

Quantum chemical calculations of DHP were performed using the density functional theory/time-dependent density functional theory (DFT/TD-DFT) as implemented in the Gaussian 09 software package. Calculations on the ground state (S0) and the lowest-energy excited singlet state (S1) in the gas phase are carried out using the CAM-B3LYP functional with the 6-31G* basis set [29].

3. Results and discussion

The ESIPT-active and donor-accepter (D-A) structured molecule DHP is shown in Fig. 1(b), which was synthesized by heating a mixed dimethyl formamide- dimethylacetal solution of 2′-hydroxyacetophenone at 85 °C for 1 h according to the reported literature [30]. Although DHP is a reported molecule, its optical properties are not fully investigated. In aprotic solvents CHCl3, the lowest-lying absorption band of DHP is located at 356 nm, as shown in Fig. 1(b) assigned to the enol absorption EE* [31]. In Fig. 1(b), the fluorescence emission of DHP was featured as dual-peak emission bands in CHCl3, namely a local emission (LE) band found at 411 nm and a large Stokes shifted ESIPT emission band found at 536 nm. However, the CHCl3 solution (1 × 105 M) of DHP displays nearly non-luminous with the Φf of 0.037. In the doped thin-film, the absorption spectra is similar with that in solution. Nevertheless, in solid-state, the fluorescence emission of DHP features broad band at 522 nm and is strongly bathochromically shifted relative to its absorption with a large Stokes shift of 1.11 eV, deriving from its ESIPT process and D-A structure [25]. No effective overlap between the absorption and the emission spectra indicates that complete ESIPT occurs and the emission is ascribed to K*K, which thereby limits self-absorption losses to offer the prospect of low ASE threshold. Besides, DHP demonstrates brightly green emissive with a Φf of 0.53 in the solid-state (thin-film with thickness of 100 nm) compared with its solution.

We deduce that the small Φf in solution for DHP is caused by ineffective radiative deactivation. Aim at better understanding of the relaxation processes, we calculate the radiative kr and nonradiative knr rate constants using the relation Φf = kr/(kr + knr) = kr × τ. Additionally, we measured the fluorescence lifetime τ. As shown in Fig. 2, the lifetimes of DHP in solution are 2.75 ns and 0.78 ns for E* form and K* form respectively [32], and the lifetime of DHP in solid-state is 1.97 ns. It is revealed that the kr ranged from 1.35 × 107 s−1 to 4.74 × 107 s−1 in solution, while, kr dramatically increased to 2.69 × 108 s−1 in solid-state. However, knr in solution (from 3.51 × 108 s−1 to 12.34 × 108 s−1) and solid-state (2.38 × 108 s−1) are similar. Therefore, radiative decay is promoted more strongly in solid-state than that in solution for DHP, which is favor of ASE performance [33].

 

Fig. 2 (a) Normalized PL decay transients for DHP in doped thin-film. (b) Normalized PL decay transients for DHP in CHCl3 solution (1 × 105 M) of E* form. (c) Normalized PL decay transients for DHP in CHCl3 solution (1 × 105 M) K* form.

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The molecular equilibrium geometry and ESIPT process of DHP can be qualitatively investigated by DFT/TD-DFT calculations [14], and the results are shown in Fig. 3. See Fig. 3(a), in the ground state, E form of DHP shows strong innate intramolecular H-bonds (1.591 Å) between the carbonyl unit and hydroxy group, which increases the molecular rigidity greatly and is favor of activating the molecular planarization [34]. Thus, it leads to a rather π-conjugated planar conformation for DHP with dihedral angle of 2.51° between phenol and carbonyl units in ground-state, as shown in Fig. 3(a). In addition, the molecular geometries of DHP in the excited LE and ESIPT states present planar conformations as well with dihedral angles of 1.08° and 1.27° between phenol and carbonyl units respectively in Fig. 3(a)

 

Fig. 3 (a) Optimized geometries for DHP. (b) Potential energy surfaces in the gas phase and representation of the LE and ESIPT states of DHP .

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Geometry optimizations in S1 base on the Franck-Condon state and the proton-transfer process generates two local minima in potential energy surface corresponding to the LE and ESIPT states respectively, and the calculated potential energy surfaces of S0 and S1 are shown in Fig. 3(b). The calculated vertical excitation energy for EE* is 3.38 eV (367 nm), which is good agreement with the experimental value (λabs = 356 nm in CHCl3), see Fig. 1(b). Relative to the optimized geometry in S0, the energies of LE and ESIPT states are + 3.15 eV and + 2.77 eV. Therefore, the calculated vertical transition energies for LE and ESIPT states emission are 425 nm and 551 nm respectively, coinciding with the experimental results (λLE,PL = 411 nm and λESIPT,PL = 536 nm in CHCl3) as shown in Fig. 1(b).

Due to the inspiring optical properties above, we next investigate the ASE behavior of the designed molecules in doped thin-film. The solid-state thin-film of 33 wt% doped with PS were fabricated by spin-coating. As the pulse energy increased, in Fig. 4(a), a narrow ASE peak achieved to dominate the emission spectra rapidly and the ASE peak located at 559.14 nm. Figure 4(b) shows the full-width at half-maximum (FWHM) linewidth and relative output power of the emission spectra as a function of the pump intensity, and dramatically decreased FWHM and increased output power were observed. In order to quantify our observations, when the FWHM intensity of the emission spectrum drops to half of its PL value, the corresponding pulse energy of exciting light is the ASE threshold. According to this definition, the ASE threshold of DHP is 12.41 mJ/cm2, which is comparable to that of other reported ESIPT molecules, such as imidazole-based [14] and 1,3-diaryl-β-diketones [25] compounds. Above all, the ASE result is consistent with the photophysical properties in solid-state thin-film of DHP, owing to the higher fluorescence quantum yield Φf, shorter excited state lifetime τ and enhanced radiative decay rate kr in solid-state, in comparison to these in solution.

 

Fig. 4 (a) The edge-emission spectra of doped thin-films for DHP excited by different energy. Output intensity at λASE. (b) Full Widths at Half-maximum (FWHM) as a function of pump energy for DHP.

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4. Conclusion

In conclusion, we have successfully synthesized a ESIPT molecule (DHP), which is nearly nonfluorescent in CHCl3 (Φf = 0.037) but displays high fluorescence quantum yield in the solid-state thin-film (Φf = 0.53). The high radiative decay rate (2.69 × 108 s−1) in the solid-state thin-film is demonstrated to originate from the effect of the enlarged fluorescence quantum yield Φf, shortened excited state lifetime τ, ESIPT-active intramolecular H-bond, the molecular planarization and molecular D-A structure, revealing by combined photophysical properties and DFT/TD-DFT studies. Finally, the favorable four-level ESIPT photocycle and suppressed self-absorption losses of DHP in solid-state thin-film allow for the occurrence of efficient ASE behavior.

Funding

National Natural Science Foundation of China (NSFC) (61705173, 61805186); The 111 Project (B17035); Natural Science Foundation of Shaanxi Province (2018JQ6077, 2018JQ6004); The China Postdoctoral Science Foundation (2018M633510); Fundamental Research Funds for the Central Universities (JB180504, JBX170513).

References

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2. K. P. Carter, A. M. Young, and A. E. Palmer, “Fluorescent Sensors for Measuring Metal Ions in Living Systems,” Chem. Rev. 114(8), 4564–4601 (2014). [CrossRef]   [PubMed]  

3. Z. Guo, S. Park, J. Yoon, and I. Shin, “Recent progress in the development of near-infrared fluorescent probes for bioimaging applications,” Chem. Soc. Rev. 43(1), 16–29 (2014). [CrossRef]   [PubMed]  

4. I. D. W. Samuel and G. A. Turnbull, “Organic Semiconductor Lasers,” Chem. Rev. 107(4), 1272–1295 (2007). [CrossRef]   [PubMed]  

5. A. J. C. Kuehne and M. C. Gather, “Organic Lasers: Recent Developments on Materials, Device Geometries, and Fabrication Techniques,” Chem. Rev. 116(21), 12823–12864 (2016). [CrossRef]   [PubMed]  

6. B. Z. Tang and A. Qin, Aggregation-Induced Emission: Fundamentals and Applications, Vol. 1 and 2, John Wiley & Sons, Chichester, UK 2013.

7. Z. Zhao, J. W. Y. Lam, and B. Z. Tang, “Tetraphenylethene: a versatile AIE building block for the construction of efficient luminescent materials for organic light-emitting diodes,” J. Mater. Chem. 22(45), 23726 (2012). [CrossRef]  

8. B. K. An, J. Gierschner, and S. Y. Park, “π-Conjugated Cyanostilbene Derivatives: A Unique Self-Assembly Motif for Molecular Nanostructures with Enhanced Emission and Transport,” Acc. Chem. Res. 45(4), 544–554 (2012). [CrossRef]   [PubMed]  

9. Y. Hong, J. W. Lam, and B. Z. Tang, “Aggregation-induced emission,” Chem. Soc. Rev. 40(11), 5361–5388 (2011). [CrossRef]   [PubMed]  

10. J. Luo, Z. Xie, J. W. Y. Lam, L. Cheng, H. Chen, C. Qiu, H. S. Kwok, X. Zhan, Y. Liu, D. Zhu, and B. Z. Tang, “Aggregation-induced emission of 1-methyl-1,2,3,4,5-pentaphenylsilole,” Chem. Commun. (Camb.) 18(18), 1740–1741 (2001). [CrossRef]   [PubMed]  

11. J. Mei, N. L. C. Leung, R. T. K. Kwok, J. W. Y. Lam, and B. Z. Tang, “Aggregation-Induced Emission: Together We Shine, United We Soar!” Chem. Rev. 115(21), 11718–11940 (2015). [CrossRef]   [PubMed]  

12. C. Zhang, C. L. Zou, Y. Yan, R. Hao, F. W. Sun, Z. F. Han, Y. S. Zhao, and J. Yao, “Two-Photon Pumped Lasing in Single-Crystal Organic Nanowire Exciton Polariton Resonators,” J. Am. Chem. Soc. 133(19), 7276–7279 (2011). [CrossRef]   [PubMed]  

13. T. Dutta, K. B. Woody, S. R. Parkin, M. D. Watson, and J. Gierschner, “Conjugated Polymers with Large Effective Stokes Shift: Benzobisdioxole-Based Poly(phenylene ethynylene)s,” J. Am. Chem. Soc. 131(47), 17321–17327 (2009). [CrossRef]   [PubMed]  

14. S. Park, J. E. Kwon, S. Y. Park, O. H. Kwon, J. K. Kim, S. J. Yoon, J. W. Chung, D. R. Whang, S. K. Park, D. K. Lee, D. J. Jang, J. Gierschner, and S. Y. Park, “Crystallization‐Induced Emission Enhancement and Amplified Spontaneous Emission from a CF3‐Containing Excited‐State Intramolecular‐Proton‐Transfer Molecule,” Adv. Opt. Mater. 5(18), 1700353 (2017). [CrossRef]  

15. X. L. Liu, Z. C. Xu, and J. M. Cole, “Molecular Design of UV-vis Absorption and Emission Properties in Organic Fluorophores: Toward Larger Bathochromic Shifts, Enhanced Molar Extinction Coefficients, and Greater Stokes Shifts,” J. Phys. Chem. C 117(32), 16584–16595 (2013). [CrossRef]  

16. X. L. Liu, J. M. Cole, and Z. C. Xu, “Substantial Intramolecular Charge Transfer Induces Long Emission Wavelengths and Mega Stokes Shifts in 6-Aminocoumarins,” J. Phys. Chem. C 121(24), 13274–13279 (2017). [CrossRef]  

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19. J. Wu, W. Liu, J. Ge, H. Zhang, and P. Wang, “New sensing mechanisms for design of fluorescent chemosensors emerging in recent years,” Chem. Soc. Rev. 40(7), 3483–3495 (2011). [CrossRef]   [PubMed]  

20. J. E. Kwon and S. Y. Park, “Advanced Organic Optoelectronic Materials: Harnessing Excited-State Intramolecular Proton Transfer (ESIPT) Process,” Adv. Mater. 23(32), 3615–3642 (2011). [CrossRef]   [PubMed]  

21. K. T. Kamtekar, A. P. Monkman, and M. R. Bryce, “Ordered Materials for Organic Electronics and Photonics,” Adv. Mater. 22, 572 (2010). [CrossRef]   [PubMed]  

22. K. Sakai, T. Ishikawa, and T. Akutagawa, “A blue-white-yellow color-tunable excited state intramolecular proton transfer (ESIPT) fluorophore: sensitivity to polar–nonpolar solvent ratios,” J. Mater. Chem. C Mater. Opt. Electron. Devices 1(47), 7866 (2013). [CrossRef]  

23. H. Sasabe and J. Kido, “Multifunctional Materials in High-Performance OLEDs: Challenges for Solid-State Lighting,” Chem. Mater. 23(3), 621–630 (2011). [CrossRef]  

24. F. Liang, L. Wang, D. Ma, X. Jing, and F. Wang, “Oxadiazole-containing material with intense blue phosphorescence emission for organic light-emitting diodes,” Appl. Phys. Lett. 81(1), 4–6 (2002). [CrossRef]  

25. X. Cheng, F. Li, S. Han, Y. Zhang, C. Jiao, J. Wei, K. Ye, Y. Wang, and H. Zhang, “Emission behaviors of unsymmetrical 1,3-diaryl-β-diketones: A model perfectly disclosing the effect of molecular conformation on luminescence of organic solids,” Sci. Rep. 5(1), 9140 (2015). [CrossRef]   [PubMed]  

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31. S. Park, O. H. Kwon, S. Kim, S. Park, M. G. Choi, M. Cha, S. Y. Park, and D. J. Jang, “Imidazole-Based Excited-State Intramolecular Proton-Transfer Materials: Synthesis and Amplified Spontaneous Emission from A Large Single Crystal,” J. Am. Chem. Soc. 127(28), 10070–10074 (2005). [CrossRef]   [PubMed]  

32. K. Benelhadj, W. Muzuzu, J. Massue, P. Retailleau, A. Charaf-Eddin, A. D. Laurent, D. Jacquemin, G. Ulrich, and R. Ziessel, “White Emitters by Tuning the Excited-State Intramolecular Proton-Transfer Fluorescence Emission in 2-(2′-Hydroxybenzofuran)benzoxazole Dyes,” Chem. Eur. J 20(40), 12843–12857 (2014). [CrossRef]   [PubMed]  

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References

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  1. G. M. Farinola and R. Ragni, “Electroluminescent materials for white organic light emitting diodes,” Chem. Soc. Rev. 40(7), 3467–3482 (2011).
    [Crossref] [PubMed]
  2. K. P. Carter, A. M. Young, and A. E. Palmer, “Fluorescent Sensors for Measuring Metal Ions in Living Systems,” Chem. Rev. 114(8), 4564–4601 (2014).
    [Crossref] [PubMed]
  3. Z. Guo, S. Park, J. Yoon, and I. Shin, “Recent progress in the development of near-infrared fluorescent probes for bioimaging applications,” Chem. Soc. Rev. 43(1), 16–29 (2014).
    [Crossref] [PubMed]
  4. I. D. W. Samuel and G. A. Turnbull, “Organic Semiconductor Lasers,” Chem. Rev. 107(4), 1272–1295 (2007).
    [Crossref] [PubMed]
  5. A. J. C. Kuehne and M. C. Gather, “Organic Lasers: Recent Developments on Materials, Device Geometries, and Fabrication Techniques,” Chem. Rev. 116(21), 12823–12864 (2016).
    [Crossref] [PubMed]
  6. B. Z. Tang and A. Qin, Aggregation-Induced Emission: Fundamentals and Applications, Vol. 1 and 2, John Wiley & Sons, Chichester, UK 2013.
  7. Z. Zhao, J. W. Y. Lam, and B. Z. Tang, “Tetraphenylethene: a versatile AIE building block for the construction of efficient luminescent materials for organic light-emitting diodes,” J. Mater. Chem. 22(45), 23726 (2012).
    [Crossref]
  8. B. K. An, J. Gierschner, and S. Y. Park, “π-Conjugated Cyanostilbene Derivatives: A Unique Self-Assembly Motif for Molecular Nanostructures with Enhanced Emission and Transport,” Acc. Chem. Res. 45(4), 544–554 (2012).
    [Crossref] [PubMed]
  9. Y. Hong, J. W. Lam, and B. Z. Tang, “Aggregation-induced emission,” Chem. Soc. Rev. 40(11), 5361–5388 (2011).
    [Crossref] [PubMed]
  10. J. Luo, Z. Xie, J. W. Y. Lam, L. Cheng, H. Chen, C. Qiu, H. S. Kwok, X. Zhan, Y. Liu, D. Zhu, and B. Z. Tang, “Aggregation-induced emission of 1-methyl-1,2,3,4,5-pentaphenylsilole,” Chem. Commun. (Camb.) 18(18), 1740–1741 (2001).
    [Crossref] [PubMed]
  11. J. Mei, N. L. C. Leung, R. T. K. Kwok, J. W. Y. Lam, and B. Z. Tang, “Aggregation-Induced Emission: Together We Shine, United We Soar!” Chem. Rev. 115(21), 11718–11940 (2015).
    [Crossref] [PubMed]
  12. C. Zhang, C. L. Zou, Y. Yan, R. Hao, F. W. Sun, Z. F. Han, Y. S. Zhao, and J. Yao, “Two-Photon Pumped Lasing in Single-Crystal Organic Nanowire Exciton Polariton Resonators,” J. Am. Chem. Soc. 133(19), 7276–7279 (2011).
    [Crossref] [PubMed]
  13. T. Dutta, K. B. Woody, S. R. Parkin, M. D. Watson, and J. Gierschner, “Conjugated Polymers with Large Effective Stokes Shift: Benzobisdioxole-Based Poly(phenylene ethynylene)s,” J. Am. Chem. Soc. 131(47), 17321–17327 (2009).
    [Crossref] [PubMed]
  14. S. Park, J. E. Kwon, S. Y. Park, O. H. Kwon, J. K. Kim, S. J. Yoon, J. W. Chung, D. R. Whang, S. K. Park, D. K. Lee, D. J. Jang, J. Gierschner, and S. Y. Park, “Crystallization‐Induced Emission Enhancement and Amplified Spontaneous Emission from a CF3‐Containing Excited‐State Intramolecular‐Proton‐Transfer Molecule,” Adv. Opt. Mater. 5(18), 1700353 (2017).
    [Crossref]
  15. X. L. Liu, Z. C. Xu, and J. M. Cole, “Molecular Design of UV-vis Absorption and Emission Properties in Organic Fluorophores: Toward Larger Bathochromic Shifts, Enhanced Molar Extinction Coefficients, and Greater Stokes Shifts,” J. Phys. Chem. C 117(32), 16584–16595 (2013).
    [Crossref]
  16. X. L. Liu, J. M. Cole, and Z. C. Xu, “Substantial Intramolecular Charge Transfer Induces Long Emission Wavelengths and Mega Stokes Shifts in 6-Aminocoumarins,” J. Phys. Chem. C 121(24), 13274–13279 (2017).
    [Crossref]
  17. V. S. Padalkar and S. Seki, “Excited-state intramolecular proton-transfer (ESIPT)-inspired solid state emitters,” Chem. Soc. Rev. 45(1), 169–202 (2016).
    [Crossref] [PubMed]
  18. J. Zhao, S. Ji, Y. Chen, H. Guo, and P. Yang, “Excited state intramolecular proton transfer (ESIPT): from principal photophysics to the development of new chromophores and applications in fluorescent molecular probes and luminescent materials,” Phys. Chem. Chem. Phys. 14(25), 8803–8817 (2012).
    [Crossref] [PubMed]
  19. J. Wu, W. Liu, J. Ge, H. Zhang, and P. Wang, “New sensing mechanisms for design of fluorescent chemosensors emerging in recent years,” Chem. Soc. Rev. 40(7), 3483–3495 (2011).
    [Crossref] [PubMed]
  20. J. E. Kwon and S. Y. Park, “Advanced Organic Optoelectronic Materials: Harnessing Excited-State Intramolecular Proton Transfer (ESIPT) Process,” Adv. Mater. 23(32), 3615–3642 (2011).
    [Crossref] [PubMed]
  21. K. T. Kamtekar, A. P. Monkman, and M. R. Bryce, “Ordered Materials for Organic Electronics and Photonics,” Adv. Mater. 22, 572 (2010).
    [Crossref] [PubMed]
  22. K. Sakai, T. Ishikawa, and T. Akutagawa, “A blue-white-yellow color-tunable excited state intramolecular proton transfer (ESIPT) fluorophore: sensitivity to polar–nonpolar solvent ratios,” J. Mater. Chem. C Mater. Opt. Electron. Devices 1(47), 7866 (2013).
    [Crossref]
  23. H. Sasabe and J. Kido, “Multifunctional Materials in High-Performance OLEDs: Challenges for Solid-State Lighting,” Chem. Mater. 23(3), 621–630 (2011).
    [Crossref]
  24. F. Liang, L. Wang, D. Ma, X. Jing, and F. Wang, “Oxadiazole-containing material with intense blue phosphorescence emission for organic light-emitting diodes,” Appl. Phys. Lett. 81(1), 4–6 (2002).
    [Crossref]
  25. X. Cheng, F. Li, S. Han, Y. Zhang, C. Jiao, J. Wei, K. Ye, Y. Wang, and H. Zhang, “Emission behaviors of unsymmetrical 1,3-diaryl-β-diketones: A model perfectly disclosing the effect of molecular conformation on luminescence of organic solids,” Sci. Rep. 5(1), 9140 (2015).
    [Crossref] [PubMed]
  26. X. Cheng, K. Wang, S. Huang, H. Zhang, H. Zhang, and Y. Wang, “Organic Crystals with Near-Infrared Amplified Spontaneous Emissions Based on 2′-Hydroxychalcone Derivatives: Subtle Structure Modification but Great Property Change,” Angew. Chem. Int. Ed. Engl. 54(29), 8369–8373 (2015).
    [Crossref] [PubMed]
  27. X. Cheng, Y. Zhang, S. Han, F. Li, H. Zhang, and Y. Wang, “Multicolor Amplified Spontaneous Emissions Based on Organic Polymorphs That Undergo Excited-State Intramolecular Proton Transfer,” Chemistry 22(14), 4899–4903 (2016).
    [Crossref] [PubMed]
  28. W. Zhang, Y. Yan, J. Gu, J. Yao, and Y. S. Zhao, “Low-Threshold Wavelength-Switchable Organic Nanowire Lasers Based on Excited-State Intramolecular Proton Transfer,” Angew. Chem. Int. Ed. Engl. 54(24), 7125–7129 (2015).
    [Crossref] [PubMed]
  29. T. Yanaia, D. P. Tew, and N. C. Handy, “A new hybrid exchange-correlation functional using the Coulomb-attenuating method (CAM-B3LYP),” Chem. Phys. Lett. 393(1-3), 51–57 (2004).
    [Crossref]
  30. K. S. Levchenko, I. S. Semenova, V. N. Yarovenko, P. S. Shmelin, and M. M. Krayushkin, “Facile syntheses of 2-substituted 3-cyanochromones,” Tetrahedron Lett. 53(28), 3630–3632 (2012).
    [Crossref]
  31. S. Park, O. H. Kwon, S. Kim, S. Park, M. G. Choi, M. Cha, S. Y. Park, and D. J. Jang, “Imidazole-Based Excited-State Intramolecular Proton-Transfer Materials: Synthesis and Amplified Spontaneous Emission from A Large Single Crystal,” J. Am. Chem. Soc. 127(28), 10070–10074 (2005).
    [Crossref] [PubMed]
  32. K. Benelhadj, W. Muzuzu, J. Massue, P. Retailleau, A. Charaf-Eddin, A. D. Laurent, D. Jacquemin, G. Ulrich, and R. Ziessel, “White Emitters by Tuning the Excited-State Intramolecular Proton-Transfer Fluorescence Emission in 2-(2′-Hydroxybenzofuran)benzoxazole Dyes,” Chem. Eur. J 20(40), 12843–12857 (2014).
    [Crossref] [PubMed]
  33. Y. Kawamura, H. Yamamoto, K. Goushi, H. Sasabe, C. Adachi, and H. Yoshizaki, “Ultraviolet amplified spontaneous emission from thin films of 4,4′-bis(9-carbazolyl)-2,2′- biphenyl and the derivatives,” Appl. Phys. Lett. 84(15), 2724–2726 (2004).
    [Crossref]
  34. A. P. Demchenko, K. C. Tang, and P. T. Chou, “Excited-state proton coupled charge transfer modulated by molecular structure and media polarization,” Chem. Soc. Rev. 42(3), 1379–1408 (2013).
    [Crossref] [PubMed]

2017 (2)

X. L. Liu, J. M. Cole, and Z. C. Xu, “Substantial Intramolecular Charge Transfer Induces Long Emission Wavelengths and Mega Stokes Shifts in 6-Aminocoumarins,” J. Phys. Chem. C 121(24), 13274–13279 (2017).
[Crossref]

S. Park, J. E. Kwon, S. Y. Park, O. H. Kwon, J. K. Kim, S. J. Yoon, J. W. Chung, D. R. Whang, S. K. Park, D. K. Lee, D. J. Jang, J. Gierschner, and S. Y. Park, “Crystallization‐Induced Emission Enhancement and Amplified Spontaneous Emission from a CF3‐Containing Excited‐State Intramolecular‐Proton‐Transfer Molecule,” Adv. Opt. Mater. 5(18), 1700353 (2017).
[Crossref]

2016 (3)

V. S. Padalkar and S. Seki, “Excited-state intramolecular proton-transfer (ESIPT)-inspired solid state emitters,” Chem. Soc. Rev. 45(1), 169–202 (2016).
[Crossref] [PubMed]

A. J. C. Kuehne and M. C. Gather, “Organic Lasers: Recent Developments on Materials, Device Geometries, and Fabrication Techniques,” Chem. Rev. 116(21), 12823–12864 (2016).
[Crossref] [PubMed]

X. Cheng, Y. Zhang, S. Han, F. Li, H. Zhang, and Y. Wang, “Multicolor Amplified Spontaneous Emissions Based on Organic Polymorphs That Undergo Excited-State Intramolecular Proton Transfer,” Chemistry 22(14), 4899–4903 (2016).
[Crossref] [PubMed]

2015 (4)

W. Zhang, Y. Yan, J. Gu, J. Yao, and Y. S. Zhao, “Low-Threshold Wavelength-Switchable Organic Nanowire Lasers Based on Excited-State Intramolecular Proton Transfer,” Angew. Chem. Int. Ed. Engl. 54(24), 7125–7129 (2015).
[Crossref] [PubMed]

X. Cheng, F. Li, S. Han, Y. Zhang, C. Jiao, J. Wei, K. Ye, Y. Wang, and H. Zhang, “Emission behaviors of unsymmetrical 1,3-diaryl-β-diketones: A model perfectly disclosing the effect of molecular conformation on luminescence of organic solids,” Sci. Rep. 5(1), 9140 (2015).
[Crossref] [PubMed]

X. Cheng, K. Wang, S. Huang, H. Zhang, H. Zhang, and Y. Wang, “Organic Crystals with Near-Infrared Amplified Spontaneous Emissions Based on 2′-Hydroxychalcone Derivatives: Subtle Structure Modification but Great Property Change,” Angew. Chem. Int. Ed. Engl. 54(29), 8369–8373 (2015).
[Crossref] [PubMed]

J. Mei, N. L. C. Leung, R. T. K. Kwok, J. W. Y. Lam, and B. Z. Tang, “Aggregation-Induced Emission: Together We Shine, United We Soar!” Chem. Rev. 115(21), 11718–11940 (2015).
[Crossref] [PubMed]

2014 (3)

K. P. Carter, A. M. Young, and A. E. Palmer, “Fluorescent Sensors for Measuring Metal Ions in Living Systems,” Chem. Rev. 114(8), 4564–4601 (2014).
[Crossref] [PubMed]

Z. Guo, S. Park, J. Yoon, and I. Shin, “Recent progress in the development of near-infrared fluorescent probes for bioimaging applications,” Chem. Soc. Rev. 43(1), 16–29 (2014).
[Crossref] [PubMed]

K. Benelhadj, W. Muzuzu, J. Massue, P. Retailleau, A. Charaf-Eddin, A. D. Laurent, D. Jacquemin, G. Ulrich, and R. Ziessel, “White Emitters by Tuning the Excited-State Intramolecular Proton-Transfer Fluorescence Emission in 2-(2′-Hydroxybenzofuran)benzoxazole Dyes,” Chem. Eur. J 20(40), 12843–12857 (2014).
[Crossref] [PubMed]

2013 (3)

A. P. Demchenko, K. C. Tang, and P. T. Chou, “Excited-state proton coupled charge transfer modulated by molecular structure and media polarization,” Chem. Soc. Rev. 42(3), 1379–1408 (2013).
[Crossref] [PubMed]

X. L. Liu, Z. C. Xu, and J. M. Cole, “Molecular Design of UV-vis Absorption and Emission Properties in Organic Fluorophores: Toward Larger Bathochromic Shifts, Enhanced Molar Extinction Coefficients, and Greater Stokes Shifts,” J. Phys. Chem. C 117(32), 16584–16595 (2013).
[Crossref]

K. Sakai, T. Ishikawa, and T. Akutagawa, “A blue-white-yellow color-tunable excited state intramolecular proton transfer (ESIPT) fluorophore: sensitivity to polar–nonpolar solvent ratios,” J. Mater. Chem. C Mater. Opt. Electron. Devices 1(47), 7866 (2013).
[Crossref]

2012 (4)

J. Zhao, S. Ji, Y. Chen, H. Guo, and P. Yang, “Excited state intramolecular proton transfer (ESIPT): from principal photophysics to the development of new chromophores and applications in fluorescent molecular probes and luminescent materials,” Phys. Chem. Chem. Phys. 14(25), 8803–8817 (2012).
[Crossref] [PubMed]

Z. Zhao, J. W. Y. Lam, and B. Z. Tang, “Tetraphenylethene: a versatile AIE building block for the construction of efficient luminescent materials for organic light-emitting diodes,” J. Mater. Chem. 22(45), 23726 (2012).
[Crossref]

B. K. An, J. Gierschner, and S. Y. Park, “π-Conjugated Cyanostilbene Derivatives: A Unique Self-Assembly Motif for Molecular Nanostructures with Enhanced Emission and Transport,” Acc. Chem. Res. 45(4), 544–554 (2012).
[Crossref] [PubMed]

K. S. Levchenko, I. S. Semenova, V. N. Yarovenko, P. S. Shmelin, and M. M. Krayushkin, “Facile syntheses of 2-substituted 3-cyanochromones,” Tetrahedron Lett. 53(28), 3630–3632 (2012).
[Crossref]

2011 (6)

G. M. Farinola and R. Ragni, “Electroluminescent materials for white organic light emitting diodes,” Chem. Soc. Rev. 40(7), 3467–3482 (2011).
[Crossref] [PubMed]

Y. Hong, J. W. Lam, and B. Z. Tang, “Aggregation-induced emission,” Chem. Soc. Rev. 40(11), 5361–5388 (2011).
[Crossref] [PubMed]

C. Zhang, C. L. Zou, Y. Yan, R. Hao, F. W. Sun, Z. F. Han, Y. S. Zhao, and J. Yao, “Two-Photon Pumped Lasing in Single-Crystal Organic Nanowire Exciton Polariton Resonators,” J. Am. Chem. Soc. 133(19), 7276–7279 (2011).
[Crossref] [PubMed]

J. Wu, W. Liu, J. Ge, H. Zhang, and P. Wang, “New sensing mechanisms for design of fluorescent chemosensors emerging in recent years,” Chem. Soc. Rev. 40(7), 3483–3495 (2011).
[Crossref] [PubMed]

J. E. Kwon and S. Y. Park, “Advanced Organic Optoelectronic Materials: Harnessing Excited-State Intramolecular Proton Transfer (ESIPT) Process,” Adv. Mater. 23(32), 3615–3642 (2011).
[Crossref] [PubMed]

H. Sasabe and J. Kido, “Multifunctional Materials in High-Performance OLEDs: Challenges for Solid-State Lighting,” Chem. Mater. 23(3), 621–630 (2011).
[Crossref]

2010 (1)

K. T. Kamtekar, A. P. Monkman, and M. R. Bryce, “Ordered Materials for Organic Electronics and Photonics,” Adv. Mater. 22, 572 (2010).
[Crossref] [PubMed]

2009 (1)

T. Dutta, K. B. Woody, S. R. Parkin, M. D. Watson, and J. Gierschner, “Conjugated Polymers with Large Effective Stokes Shift: Benzobisdioxole-Based Poly(phenylene ethynylene)s,” J. Am. Chem. Soc. 131(47), 17321–17327 (2009).
[Crossref] [PubMed]

2007 (1)

I. D. W. Samuel and G. A. Turnbull, “Organic Semiconductor Lasers,” Chem. Rev. 107(4), 1272–1295 (2007).
[Crossref] [PubMed]

2005 (1)

S. Park, O. H. Kwon, S. Kim, S. Park, M. G. Choi, M. Cha, S. Y. Park, and D. J. Jang, “Imidazole-Based Excited-State Intramolecular Proton-Transfer Materials: Synthesis and Amplified Spontaneous Emission from A Large Single Crystal,” J. Am. Chem. Soc. 127(28), 10070–10074 (2005).
[Crossref] [PubMed]

2004 (2)

Y. Kawamura, H. Yamamoto, K. Goushi, H. Sasabe, C. Adachi, and H. Yoshizaki, “Ultraviolet amplified spontaneous emission from thin films of 4,4′-bis(9-carbazolyl)-2,2′- biphenyl and the derivatives,” Appl. Phys. Lett. 84(15), 2724–2726 (2004).
[Crossref]

T. Yanaia, D. P. Tew, and N. C. Handy, “A new hybrid exchange-correlation functional using the Coulomb-attenuating method (CAM-B3LYP),” Chem. Phys. Lett. 393(1-3), 51–57 (2004).
[Crossref]

2002 (1)

F. Liang, L. Wang, D. Ma, X. Jing, and F. Wang, “Oxadiazole-containing material with intense blue phosphorescence emission for organic light-emitting diodes,” Appl. Phys. Lett. 81(1), 4–6 (2002).
[Crossref]

2001 (1)

J. Luo, Z. Xie, J. W. Y. Lam, L. Cheng, H. Chen, C. Qiu, H. S. Kwok, X. Zhan, Y. Liu, D. Zhu, and B. Z. Tang, “Aggregation-induced emission of 1-methyl-1,2,3,4,5-pentaphenylsilole,” Chem. Commun. (Camb.) 18(18), 1740–1741 (2001).
[Crossref] [PubMed]

Adachi, C.

Y. Kawamura, H. Yamamoto, K. Goushi, H. Sasabe, C. Adachi, and H. Yoshizaki, “Ultraviolet amplified spontaneous emission from thin films of 4,4′-bis(9-carbazolyl)-2,2′- biphenyl and the derivatives,” Appl. Phys. Lett. 84(15), 2724–2726 (2004).
[Crossref]

Akutagawa, T.

K. Sakai, T. Ishikawa, and T. Akutagawa, “A blue-white-yellow color-tunable excited state intramolecular proton transfer (ESIPT) fluorophore: sensitivity to polar–nonpolar solvent ratios,” J. Mater. Chem. C Mater. Opt. Electron. Devices 1(47), 7866 (2013).
[Crossref]

An, B. K.

B. K. An, J. Gierschner, and S. Y. Park, “π-Conjugated Cyanostilbene Derivatives: A Unique Self-Assembly Motif for Molecular Nanostructures with Enhanced Emission and Transport,” Acc. Chem. Res. 45(4), 544–554 (2012).
[Crossref] [PubMed]

Benelhadj, K.

K. Benelhadj, W. Muzuzu, J. Massue, P. Retailleau, A. Charaf-Eddin, A. D. Laurent, D. Jacquemin, G. Ulrich, and R. Ziessel, “White Emitters by Tuning the Excited-State Intramolecular Proton-Transfer Fluorescence Emission in 2-(2′-Hydroxybenzofuran)benzoxazole Dyes,” Chem. Eur. J 20(40), 12843–12857 (2014).
[Crossref] [PubMed]

Bryce, M. R.

K. T. Kamtekar, A. P. Monkman, and M. R. Bryce, “Ordered Materials for Organic Electronics and Photonics,” Adv. Mater. 22, 572 (2010).
[Crossref] [PubMed]

Carter, K. P.

K. P. Carter, A. M. Young, and A. E. Palmer, “Fluorescent Sensors for Measuring Metal Ions in Living Systems,” Chem. Rev. 114(8), 4564–4601 (2014).
[Crossref] [PubMed]

Cha, M.

S. Park, O. H. Kwon, S. Kim, S. Park, M. G. Choi, M. Cha, S. Y. Park, and D. J. Jang, “Imidazole-Based Excited-State Intramolecular Proton-Transfer Materials: Synthesis and Amplified Spontaneous Emission from A Large Single Crystal,” J. Am. Chem. Soc. 127(28), 10070–10074 (2005).
[Crossref] [PubMed]

Charaf-Eddin, A.

K. Benelhadj, W. Muzuzu, J. Massue, P. Retailleau, A. Charaf-Eddin, A. D. Laurent, D. Jacquemin, G. Ulrich, and R. Ziessel, “White Emitters by Tuning the Excited-State Intramolecular Proton-Transfer Fluorescence Emission in 2-(2′-Hydroxybenzofuran)benzoxazole Dyes,” Chem. Eur. J 20(40), 12843–12857 (2014).
[Crossref] [PubMed]

Chen, H.

J. Luo, Z. Xie, J. W. Y. Lam, L. Cheng, H. Chen, C. Qiu, H. S. Kwok, X. Zhan, Y. Liu, D. Zhu, and B. Z. Tang, “Aggregation-induced emission of 1-methyl-1,2,3,4,5-pentaphenylsilole,” Chem. Commun. (Camb.) 18(18), 1740–1741 (2001).
[Crossref] [PubMed]

Chen, Y.

J. Zhao, S. Ji, Y. Chen, H. Guo, and P. Yang, “Excited state intramolecular proton transfer (ESIPT): from principal photophysics to the development of new chromophores and applications in fluorescent molecular probes and luminescent materials,” Phys. Chem. Chem. Phys. 14(25), 8803–8817 (2012).
[Crossref] [PubMed]

Cheng, L.

J. Luo, Z. Xie, J. W. Y. Lam, L. Cheng, H. Chen, C. Qiu, H. S. Kwok, X. Zhan, Y. Liu, D. Zhu, and B. Z. Tang, “Aggregation-induced emission of 1-methyl-1,2,3,4,5-pentaphenylsilole,” Chem. Commun. (Camb.) 18(18), 1740–1741 (2001).
[Crossref] [PubMed]

Cheng, X.

X. Cheng, Y. Zhang, S. Han, F. Li, H. Zhang, and Y. Wang, “Multicolor Amplified Spontaneous Emissions Based on Organic Polymorphs That Undergo Excited-State Intramolecular Proton Transfer,” Chemistry 22(14), 4899–4903 (2016).
[Crossref] [PubMed]

X. Cheng, K. Wang, S. Huang, H. Zhang, H. Zhang, and Y. Wang, “Organic Crystals with Near-Infrared Amplified Spontaneous Emissions Based on 2′-Hydroxychalcone Derivatives: Subtle Structure Modification but Great Property Change,” Angew. Chem. Int. Ed. Engl. 54(29), 8369–8373 (2015).
[Crossref] [PubMed]

X. Cheng, F. Li, S. Han, Y. Zhang, C. Jiao, J. Wei, K. Ye, Y. Wang, and H. Zhang, “Emission behaviors of unsymmetrical 1,3-diaryl-β-diketones: A model perfectly disclosing the effect of molecular conformation on luminescence of organic solids,” Sci. Rep. 5(1), 9140 (2015).
[Crossref] [PubMed]

Choi, M. G.

S. Park, O. H. Kwon, S. Kim, S. Park, M. G. Choi, M. Cha, S. Y. Park, and D. J. Jang, “Imidazole-Based Excited-State Intramolecular Proton-Transfer Materials: Synthesis and Amplified Spontaneous Emission from A Large Single Crystal,” J. Am. Chem. Soc. 127(28), 10070–10074 (2005).
[Crossref] [PubMed]

Chou, P. T.

A. P. Demchenko, K. C. Tang, and P. T. Chou, “Excited-state proton coupled charge transfer modulated by molecular structure and media polarization,” Chem. Soc. Rev. 42(3), 1379–1408 (2013).
[Crossref] [PubMed]

Chung, J. W.

S. Park, J. E. Kwon, S. Y. Park, O. H. Kwon, J. K. Kim, S. J. Yoon, J. W. Chung, D. R. Whang, S. K. Park, D. K. Lee, D. J. Jang, J. Gierschner, and S. Y. Park, “Crystallization‐Induced Emission Enhancement and Amplified Spontaneous Emission from a CF3‐Containing Excited‐State Intramolecular‐Proton‐Transfer Molecule,” Adv. Opt. Mater. 5(18), 1700353 (2017).
[Crossref]

Cole, J. M.

X. L. Liu, J. M. Cole, and Z. C. Xu, “Substantial Intramolecular Charge Transfer Induces Long Emission Wavelengths and Mega Stokes Shifts in 6-Aminocoumarins,” J. Phys. Chem. C 121(24), 13274–13279 (2017).
[Crossref]

X. L. Liu, Z. C. Xu, and J. M. Cole, “Molecular Design of UV-vis Absorption and Emission Properties in Organic Fluorophores: Toward Larger Bathochromic Shifts, Enhanced Molar Extinction Coefficients, and Greater Stokes Shifts,” J. Phys. Chem. C 117(32), 16584–16595 (2013).
[Crossref]

Demchenko, A. P.

A. P. Demchenko, K. C. Tang, and P. T. Chou, “Excited-state proton coupled charge transfer modulated by molecular structure and media polarization,” Chem. Soc. Rev. 42(3), 1379–1408 (2013).
[Crossref] [PubMed]

Dutta, T.

T. Dutta, K. B. Woody, S. R. Parkin, M. D. Watson, and J. Gierschner, “Conjugated Polymers with Large Effective Stokes Shift: Benzobisdioxole-Based Poly(phenylene ethynylene)s,” J. Am. Chem. Soc. 131(47), 17321–17327 (2009).
[Crossref] [PubMed]

Farinola, G. M.

G. M. Farinola and R. Ragni, “Electroluminescent materials for white organic light emitting diodes,” Chem. Soc. Rev. 40(7), 3467–3482 (2011).
[Crossref] [PubMed]

Gather, M. C.

A. J. C. Kuehne and M. C. Gather, “Organic Lasers: Recent Developments on Materials, Device Geometries, and Fabrication Techniques,” Chem. Rev. 116(21), 12823–12864 (2016).
[Crossref] [PubMed]

Ge, J.

J. Wu, W. Liu, J. Ge, H. Zhang, and P. Wang, “New sensing mechanisms for design of fluorescent chemosensors emerging in recent years,” Chem. Soc. Rev. 40(7), 3483–3495 (2011).
[Crossref] [PubMed]

Gierschner, J.

S. Park, J. E. Kwon, S. Y. Park, O. H. Kwon, J. K. Kim, S. J. Yoon, J. W. Chung, D. R. Whang, S. K. Park, D. K. Lee, D. J. Jang, J. Gierschner, and S. Y. Park, “Crystallization‐Induced Emission Enhancement and Amplified Spontaneous Emission from a CF3‐Containing Excited‐State Intramolecular‐Proton‐Transfer Molecule,” Adv. Opt. Mater. 5(18), 1700353 (2017).
[Crossref]

B. K. An, J. Gierschner, and S. Y. Park, “π-Conjugated Cyanostilbene Derivatives: A Unique Self-Assembly Motif for Molecular Nanostructures with Enhanced Emission and Transport,” Acc. Chem. Res. 45(4), 544–554 (2012).
[Crossref] [PubMed]

T. Dutta, K. B. Woody, S. R. Parkin, M. D. Watson, and J. Gierschner, “Conjugated Polymers with Large Effective Stokes Shift: Benzobisdioxole-Based Poly(phenylene ethynylene)s,” J. Am. Chem. Soc. 131(47), 17321–17327 (2009).
[Crossref] [PubMed]

Goushi, K.

Y. Kawamura, H. Yamamoto, K. Goushi, H. Sasabe, C. Adachi, and H. Yoshizaki, “Ultraviolet amplified spontaneous emission from thin films of 4,4′-bis(9-carbazolyl)-2,2′- biphenyl and the derivatives,” Appl. Phys. Lett. 84(15), 2724–2726 (2004).
[Crossref]

Gu, J.

W. Zhang, Y. Yan, J. Gu, J. Yao, and Y. S. Zhao, “Low-Threshold Wavelength-Switchable Organic Nanowire Lasers Based on Excited-State Intramolecular Proton Transfer,” Angew. Chem. Int. Ed. Engl. 54(24), 7125–7129 (2015).
[Crossref] [PubMed]

Guo, H.

J. Zhao, S. Ji, Y. Chen, H. Guo, and P. Yang, “Excited state intramolecular proton transfer (ESIPT): from principal photophysics to the development of new chromophores and applications in fluorescent molecular probes and luminescent materials,” Phys. Chem. Chem. Phys. 14(25), 8803–8817 (2012).
[Crossref] [PubMed]

Guo, Z.

Z. Guo, S. Park, J. Yoon, and I. Shin, “Recent progress in the development of near-infrared fluorescent probes for bioimaging applications,” Chem. Soc. Rev. 43(1), 16–29 (2014).
[Crossref] [PubMed]

Han, S.

X. Cheng, Y. Zhang, S. Han, F. Li, H. Zhang, and Y. Wang, “Multicolor Amplified Spontaneous Emissions Based on Organic Polymorphs That Undergo Excited-State Intramolecular Proton Transfer,” Chemistry 22(14), 4899–4903 (2016).
[Crossref] [PubMed]

X. Cheng, F. Li, S. Han, Y. Zhang, C. Jiao, J. Wei, K. Ye, Y. Wang, and H. Zhang, “Emission behaviors of unsymmetrical 1,3-diaryl-β-diketones: A model perfectly disclosing the effect of molecular conformation on luminescence of organic solids,” Sci. Rep. 5(1), 9140 (2015).
[Crossref] [PubMed]

Han, Z. F.

C. Zhang, C. L. Zou, Y. Yan, R. Hao, F. W. Sun, Z. F. Han, Y. S. Zhao, and J. Yao, “Two-Photon Pumped Lasing in Single-Crystal Organic Nanowire Exciton Polariton Resonators,” J. Am. Chem. Soc. 133(19), 7276–7279 (2011).
[Crossref] [PubMed]

Handy, N. C.

T. Yanaia, D. P. Tew, and N. C. Handy, “A new hybrid exchange-correlation functional using the Coulomb-attenuating method (CAM-B3LYP),” Chem. Phys. Lett. 393(1-3), 51–57 (2004).
[Crossref]

Hao, R.

C. Zhang, C. L. Zou, Y. Yan, R. Hao, F. W. Sun, Z. F. Han, Y. S. Zhao, and J. Yao, “Two-Photon Pumped Lasing in Single-Crystal Organic Nanowire Exciton Polariton Resonators,” J. Am. Chem. Soc. 133(19), 7276–7279 (2011).
[Crossref] [PubMed]

Hong, Y.

Y. Hong, J. W. Lam, and B. Z. Tang, “Aggregation-induced emission,” Chem. Soc. Rev. 40(11), 5361–5388 (2011).
[Crossref] [PubMed]

Huang, S.

X. Cheng, K. Wang, S. Huang, H. Zhang, H. Zhang, and Y. Wang, “Organic Crystals with Near-Infrared Amplified Spontaneous Emissions Based on 2′-Hydroxychalcone Derivatives: Subtle Structure Modification but Great Property Change,” Angew. Chem. Int. Ed. Engl. 54(29), 8369–8373 (2015).
[Crossref] [PubMed]

Ishikawa, T.

K. Sakai, T. Ishikawa, and T. Akutagawa, “A blue-white-yellow color-tunable excited state intramolecular proton transfer (ESIPT) fluorophore: sensitivity to polar–nonpolar solvent ratios,” J. Mater. Chem. C Mater. Opt. Electron. Devices 1(47), 7866 (2013).
[Crossref]

Jacquemin, D.

K. Benelhadj, W. Muzuzu, J. Massue, P. Retailleau, A. Charaf-Eddin, A. D. Laurent, D. Jacquemin, G. Ulrich, and R. Ziessel, “White Emitters by Tuning the Excited-State Intramolecular Proton-Transfer Fluorescence Emission in 2-(2′-Hydroxybenzofuran)benzoxazole Dyes,” Chem. Eur. J 20(40), 12843–12857 (2014).
[Crossref] [PubMed]

Jang, D. J.

S. Park, J. E. Kwon, S. Y. Park, O. H. Kwon, J. K. Kim, S. J. Yoon, J. W. Chung, D. R. Whang, S. K. Park, D. K. Lee, D. J. Jang, J. Gierschner, and S. Y. Park, “Crystallization‐Induced Emission Enhancement and Amplified Spontaneous Emission from a CF3‐Containing Excited‐State Intramolecular‐Proton‐Transfer Molecule,” Adv. Opt. Mater. 5(18), 1700353 (2017).
[Crossref]

S. Park, O. H. Kwon, S. Kim, S. Park, M. G. Choi, M. Cha, S. Y. Park, and D. J. Jang, “Imidazole-Based Excited-State Intramolecular Proton-Transfer Materials: Synthesis and Amplified Spontaneous Emission from A Large Single Crystal,” J. Am. Chem. Soc. 127(28), 10070–10074 (2005).
[Crossref] [PubMed]

Ji, S.

J. Zhao, S. Ji, Y. Chen, H. Guo, and P. Yang, “Excited state intramolecular proton transfer (ESIPT): from principal photophysics to the development of new chromophores and applications in fluorescent molecular probes and luminescent materials,” Phys. Chem. Chem. Phys. 14(25), 8803–8817 (2012).
[Crossref] [PubMed]

Jiao, C.

X. Cheng, F. Li, S. Han, Y. Zhang, C. Jiao, J. Wei, K. Ye, Y. Wang, and H. Zhang, “Emission behaviors of unsymmetrical 1,3-diaryl-β-diketones: A model perfectly disclosing the effect of molecular conformation on luminescence of organic solids,” Sci. Rep. 5(1), 9140 (2015).
[Crossref] [PubMed]

Jing, X.

F. Liang, L. Wang, D. Ma, X. Jing, and F. Wang, “Oxadiazole-containing material with intense blue phosphorescence emission for organic light-emitting diodes,” Appl. Phys. Lett. 81(1), 4–6 (2002).
[Crossref]

Kamtekar, K. T.

K. T. Kamtekar, A. P. Monkman, and M. R. Bryce, “Ordered Materials for Organic Electronics and Photonics,” Adv. Mater. 22, 572 (2010).
[Crossref] [PubMed]

Kawamura, Y.

Y. Kawamura, H. Yamamoto, K. Goushi, H. Sasabe, C. Adachi, and H. Yoshizaki, “Ultraviolet amplified spontaneous emission from thin films of 4,4′-bis(9-carbazolyl)-2,2′- biphenyl and the derivatives,” Appl. Phys. Lett. 84(15), 2724–2726 (2004).
[Crossref]

Kido, J.

H. Sasabe and J. Kido, “Multifunctional Materials in High-Performance OLEDs: Challenges for Solid-State Lighting,” Chem. Mater. 23(3), 621–630 (2011).
[Crossref]

Kim, J. K.

S. Park, J. E. Kwon, S. Y. Park, O. H. Kwon, J. K. Kim, S. J. Yoon, J. W. Chung, D. R. Whang, S. K. Park, D. K. Lee, D. J. Jang, J. Gierschner, and S. Y. Park, “Crystallization‐Induced Emission Enhancement and Amplified Spontaneous Emission from a CF3‐Containing Excited‐State Intramolecular‐Proton‐Transfer Molecule,” Adv. Opt. Mater. 5(18), 1700353 (2017).
[Crossref]

Kim, S.

S. Park, O. H. Kwon, S. Kim, S. Park, M. G. Choi, M. Cha, S. Y. Park, and D. J. Jang, “Imidazole-Based Excited-State Intramolecular Proton-Transfer Materials: Synthesis and Amplified Spontaneous Emission from A Large Single Crystal,” J. Am. Chem. Soc. 127(28), 10070–10074 (2005).
[Crossref] [PubMed]

Krayushkin, M. M.

K. S. Levchenko, I. S. Semenova, V. N. Yarovenko, P. S. Shmelin, and M. M. Krayushkin, “Facile syntheses of 2-substituted 3-cyanochromones,” Tetrahedron Lett. 53(28), 3630–3632 (2012).
[Crossref]

Kuehne, A. J. C.

A. J. C. Kuehne and M. C. Gather, “Organic Lasers: Recent Developments on Materials, Device Geometries, and Fabrication Techniques,” Chem. Rev. 116(21), 12823–12864 (2016).
[Crossref] [PubMed]

Kwok, H. S.

J. Luo, Z. Xie, J. W. Y. Lam, L. Cheng, H. Chen, C. Qiu, H. S. Kwok, X. Zhan, Y. Liu, D. Zhu, and B. Z. Tang, “Aggregation-induced emission of 1-methyl-1,2,3,4,5-pentaphenylsilole,” Chem. Commun. (Camb.) 18(18), 1740–1741 (2001).
[Crossref] [PubMed]

Kwok, R. T. K.

J. Mei, N. L. C. Leung, R. T. K. Kwok, J. W. Y. Lam, and B. Z. Tang, “Aggregation-Induced Emission: Together We Shine, United We Soar!” Chem. Rev. 115(21), 11718–11940 (2015).
[Crossref] [PubMed]

Kwon, J. E.

S. Park, J. E. Kwon, S. Y. Park, O. H. Kwon, J. K. Kim, S. J. Yoon, J. W. Chung, D. R. Whang, S. K. Park, D. K. Lee, D. J. Jang, J. Gierschner, and S. Y. Park, “Crystallization‐Induced Emission Enhancement and Amplified Spontaneous Emission from a CF3‐Containing Excited‐State Intramolecular‐Proton‐Transfer Molecule,” Adv. Opt. Mater. 5(18), 1700353 (2017).
[Crossref]

J. E. Kwon and S. Y. Park, “Advanced Organic Optoelectronic Materials: Harnessing Excited-State Intramolecular Proton Transfer (ESIPT) Process,” Adv. Mater. 23(32), 3615–3642 (2011).
[Crossref] [PubMed]

Kwon, O. H.

S. Park, J. E. Kwon, S. Y. Park, O. H. Kwon, J. K. Kim, S. J. Yoon, J. W. Chung, D. R. Whang, S. K. Park, D. K. Lee, D. J. Jang, J. Gierschner, and S. Y. Park, “Crystallization‐Induced Emission Enhancement and Amplified Spontaneous Emission from a CF3‐Containing Excited‐State Intramolecular‐Proton‐Transfer Molecule,” Adv. Opt. Mater. 5(18), 1700353 (2017).
[Crossref]

S. Park, O. H. Kwon, S. Kim, S. Park, M. G. Choi, M. Cha, S. Y. Park, and D. J. Jang, “Imidazole-Based Excited-State Intramolecular Proton-Transfer Materials: Synthesis and Amplified Spontaneous Emission from A Large Single Crystal,” J. Am. Chem. Soc. 127(28), 10070–10074 (2005).
[Crossref] [PubMed]

Lam, J. W.

Y. Hong, J. W. Lam, and B. Z. Tang, “Aggregation-induced emission,” Chem. Soc. Rev. 40(11), 5361–5388 (2011).
[Crossref] [PubMed]

Lam, J. W. Y.

J. Mei, N. L. C. Leung, R. T. K. Kwok, J. W. Y. Lam, and B. Z. Tang, “Aggregation-Induced Emission: Together We Shine, United We Soar!” Chem. Rev. 115(21), 11718–11940 (2015).
[Crossref] [PubMed]

Z. Zhao, J. W. Y. Lam, and B. Z. Tang, “Tetraphenylethene: a versatile AIE building block for the construction of efficient luminescent materials for organic light-emitting diodes,” J. Mater. Chem. 22(45), 23726 (2012).
[Crossref]

J. Luo, Z. Xie, J. W. Y. Lam, L. Cheng, H. Chen, C. Qiu, H. S. Kwok, X. Zhan, Y. Liu, D. Zhu, and B. Z. Tang, “Aggregation-induced emission of 1-methyl-1,2,3,4,5-pentaphenylsilole,” Chem. Commun. (Camb.) 18(18), 1740–1741 (2001).
[Crossref] [PubMed]

Laurent, A. D.

K. Benelhadj, W. Muzuzu, J. Massue, P. Retailleau, A. Charaf-Eddin, A. D. Laurent, D. Jacquemin, G. Ulrich, and R. Ziessel, “White Emitters by Tuning the Excited-State Intramolecular Proton-Transfer Fluorescence Emission in 2-(2′-Hydroxybenzofuran)benzoxazole Dyes,” Chem. Eur. J 20(40), 12843–12857 (2014).
[Crossref] [PubMed]

Lee, D. K.

S. Park, J. E. Kwon, S. Y. Park, O. H. Kwon, J. K. Kim, S. J. Yoon, J. W. Chung, D. R. Whang, S. K. Park, D. K. Lee, D. J. Jang, J. Gierschner, and S. Y. Park, “Crystallization‐Induced Emission Enhancement and Amplified Spontaneous Emission from a CF3‐Containing Excited‐State Intramolecular‐Proton‐Transfer Molecule,” Adv. Opt. Mater. 5(18), 1700353 (2017).
[Crossref]

Leung, N. L. C.

J. Mei, N. L. C. Leung, R. T. K. Kwok, J. W. Y. Lam, and B. Z. Tang, “Aggregation-Induced Emission: Together We Shine, United We Soar!” Chem. Rev. 115(21), 11718–11940 (2015).
[Crossref] [PubMed]

Levchenko, K. S.

K. S. Levchenko, I. S. Semenova, V. N. Yarovenko, P. S. Shmelin, and M. M. Krayushkin, “Facile syntheses of 2-substituted 3-cyanochromones,” Tetrahedron Lett. 53(28), 3630–3632 (2012).
[Crossref]

Li, F.

X. Cheng, Y. Zhang, S. Han, F. Li, H. Zhang, and Y. Wang, “Multicolor Amplified Spontaneous Emissions Based on Organic Polymorphs That Undergo Excited-State Intramolecular Proton Transfer,” Chemistry 22(14), 4899–4903 (2016).
[Crossref] [PubMed]

X. Cheng, F. Li, S. Han, Y. Zhang, C. Jiao, J. Wei, K. Ye, Y. Wang, and H. Zhang, “Emission behaviors of unsymmetrical 1,3-diaryl-β-diketones: A model perfectly disclosing the effect of molecular conformation on luminescence of organic solids,” Sci. Rep. 5(1), 9140 (2015).
[Crossref] [PubMed]

Liang, F.

F. Liang, L. Wang, D. Ma, X. Jing, and F. Wang, “Oxadiazole-containing material with intense blue phosphorescence emission for organic light-emitting diodes,” Appl. Phys. Lett. 81(1), 4–6 (2002).
[Crossref]

Liu, W.

J. Wu, W. Liu, J. Ge, H. Zhang, and P. Wang, “New sensing mechanisms for design of fluorescent chemosensors emerging in recent years,” Chem. Soc. Rev. 40(7), 3483–3495 (2011).
[Crossref] [PubMed]

Liu, X. L.

X. L. Liu, J. M. Cole, and Z. C. Xu, “Substantial Intramolecular Charge Transfer Induces Long Emission Wavelengths and Mega Stokes Shifts in 6-Aminocoumarins,” J. Phys. Chem. C 121(24), 13274–13279 (2017).
[Crossref]

X. L. Liu, Z. C. Xu, and J. M. Cole, “Molecular Design of UV-vis Absorption and Emission Properties in Organic Fluorophores: Toward Larger Bathochromic Shifts, Enhanced Molar Extinction Coefficients, and Greater Stokes Shifts,” J. Phys. Chem. C 117(32), 16584–16595 (2013).
[Crossref]

Liu, Y.

J. Luo, Z. Xie, J. W. Y. Lam, L. Cheng, H. Chen, C. Qiu, H. S. Kwok, X. Zhan, Y. Liu, D. Zhu, and B. Z. Tang, “Aggregation-induced emission of 1-methyl-1,2,3,4,5-pentaphenylsilole,” Chem. Commun. (Camb.) 18(18), 1740–1741 (2001).
[Crossref] [PubMed]

Luo, J.

J. Luo, Z. Xie, J. W. Y. Lam, L. Cheng, H. Chen, C. Qiu, H. S. Kwok, X. Zhan, Y. Liu, D. Zhu, and B. Z. Tang, “Aggregation-induced emission of 1-methyl-1,2,3,4,5-pentaphenylsilole,” Chem. Commun. (Camb.) 18(18), 1740–1741 (2001).
[Crossref] [PubMed]

Ma, D.

F. Liang, L. Wang, D. Ma, X. Jing, and F. Wang, “Oxadiazole-containing material with intense blue phosphorescence emission for organic light-emitting diodes,” Appl. Phys. Lett. 81(1), 4–6 (2002).
[Crossref]

Massue, J.

K. Benelhadj, W. Muzuzu, J. Massue, P. Retailleau, A. Charaf-Eddin, A. D. Laurent, D. Jacquemin, G. Ulrich, and R. Ziessel, “White Emitters by Tuning the Excited-State Intramolecular Proton-Transfer Fluorescence Emission in 2-(2′-Hydroxybenzofuran)benzoxazole Dyes,” Chem. Eur. J 20(40), 12843–12857 (2014).
[Crossref] [PubMed]

Mei, J.

J. Mei, N. L. C. Leung, R. T. K. Kwok, J. W. Y. Lam, and B. Z. Tang, “Aggregation-Induced Emission: Together We Shine, United We Soar!” Chem. Rev. 115(21), 11718–11940 (2015).
[Crossref] [PubMed]

Monkman, A. P.

K. T. Kamtekar, A. P. Monkman, and M. R. Bryce, “Ordered Materials for Organic Electronics and Photonics,” Adv. Mater. 22, 572 (2010).
[Crossref] [PubMed]

Muzuzu, W.

K. Benelhadj, W. Muzuzu, J. Massue, P. Retailleau, A. Charaf-Eddin, A. D. Laurent, D. Jacquemin, G. Ulrich, and R. Ziessel, “White Emitters by Tuning the Excited-State Intramolecular Proton-Transfer Fluorescence Emission in 2-(2′-Hydroxybenzofuran)benzoxazole Dyes,” Chem. Eur. J 20(40), 12843–12857 (2014).
[Crossref] [PubMed]

Padalkar, V. S.

V. S. Padalkar and S. Seki, “Excited-state intramolecular proton-transfer (ESIPT)-inspired solid state emitters,” Chem. Soc. Rev. 45(1), 169–202 (2016).
[Crossref] [PubMed]

Palmer, A. E.

K. P. Carter, A. M. Young, and A. E. Palmer, “Fluorescent Sensors for Measuring Metal Ions in Living Systems,” Chem. Rev. 114(8), 4564–4601 (2014).
[Crossref] [PubMed]

Park, S.

S. Park, J. E. Kwon, S. Y. Park, O. H. Kwon, J. K. Kim, S. J. Yoon, J. W. Chung, D. R. Whang, S. K. Park, D. K. Lee, D. J. Jang, J. Gierschner, and S. Y. Park, “Crystallization‐Induced Emission Enhancement and Amplified Spontaneous Emission from a CF3‐Containing Excited‐State Intramolecular‐Proton‐Transfer Molecule,” Adv. Opt. Mater. 5(18), 1700353 (2017).
[Crossref]

Z. Guo, S. Park, J. Yoon, and I. Shin, “Recent progress in the development of near-infrared fluorescent probes for bioimaging applications,” Chem. Soc. Rev. 43(1), 16–29 (2014).
[Crossref] [PubMed]

S. Park, O. H. Kwon, S. Kim, S. Park, M. G. Choi, M. Cha, S. Y. Park, and D. J. Jang, “Imidazole-Based Excited-State Intramolecular Proton-Transfer Materials: Synthesis and Amplified Spontaneous Emission from A Large Single Crystal,” J. Am. Chem. Soc. 127(28), 10070–10074 (2005).
[Crossref] [PubMed]

S. Park, O. H. Kwon, S. Kim, S. Park, M. G. Choi, M. Cha, S. Y. Park, and D. J. Jang, “Imidazole-Based Excited-State Intramolecular Proton-Transfer Materials: Synthesis and Amplified Spontaneous Emission from A Large Single Crystal,” J. Am. Chem. Soc. 127(28), 10070–10074 (2005).
[Crossref] [PubMed]

Park, S. K.

S. Park, J. E. Kwon, S. Y. Park, O. H. Kwon, J. K. Kim, S. J. Yoon, J. W. Chung, D. R. Whang, S. K. Park, D. K. Lee, D. J. Jang, J. Gierschner, and S. Y. Park, “Crystallization‐Induced Emission Enhancement and Amplified Spontaneous Emission from a CF3‐Containing Excited‐State Intramolecular‐Proton‐Transfer Molecule,” Adv. Opt. Mater. 5(18), 1700353 (2017).
[Crossref]

Park, S. Y.

S. Park, J. E. Kwon, S. Y. Park, O. H. Kwon, J. K. Kim, S. J. Yoon, J. W. Chung, D. R. Whang, S. K. Park, D. K. Lee, D. J. Jang, J. Gierschner, and S. Y. Park, “Crystallization‐Induced Emission Enhancement and Amplified Spontaneous Emission from a CF3‐Containing Excited‐State Intramolecular‐Proton‐Transfer Molecule,” Adv. Opt. Mater. 5(18), 1700353 (2017).
[Crossref]

S. Park, J. E. Kwon, S. Y. Park, O. H. Kwon, J. K. Kim, S. J. Yoon, J. W. Chung, D. R. Whang, S. K. Park, D. K. Lee, D. J. Jang, J. Gierschner, and S. Y. Park, “Crystallization‐Induced Emission Enhancement and Amplified Spontaneous Emission from a CF3‐Containing Excited‐State Intramolecular‐Proton‐Transfer Molecule,” Adv. Opt. Mater. 5(18), 1700353 (2017).
[Crossref]

B. K. An, J. Gierschner, and S. Y. Park, “π-Conjugated Cyanostilbene Derivatives: A Unique Self-Assembly Motif for Molecular Nanostructures with Enhanced Emission and Transport,” Acc. Chem. Res. 45(4), 544–554 (2012).
[Crossref] [PubMed]

J. E. Kwon and S. Y. Park, “Advanced Organic Optoelectronic Materials: Harnessing Excited-State Intramolecular Proton Transfer (ESIPT) Process,” Adv. Mater. 23(32), 3615–3642 (2011).
[Crossref] [PubMed]

S. Park, O. H. Kwon, S. Kim, S. Park, M. G. Choi, M. Cha, S. Y. Park, and D. J. Jang, “Imidazole-Based Excited-State Intramolecular Proton-Transfer Materials: Synthesis and Amplified Spontaneous Emission from A Large Single Crystal,” J. Am. Chem. Soc. 127(28), 10070–10074 (2005).
[Crossref] [PubMed]

Parkin, S. R.

T. Dutta, K. B. Woody, S. R. Parkin, M. D. Watson, and J. Gierschner, “Conjugated Polymers with Large Effective Stokes Shift: Benzobisdioxole-Based Poly(phenylene ethynylene)s,” J. Am. Chem. Soc. 131(47), 17321–17327 (2009).
[Crossref] [PubMed]

Qiu, C.

J. Luo, Z. Xie, J. W. Y. Lam, L. Cheng, H. Chen, C. Qiu, H. S. Kwok, X. Zhan, Y. Liu, D. Zhu, and B. Z. Tang, “Aggregation-induced emission of 1-methyl-1,2,3,4,5-pentaphenylsilole,” Chem. Commun. (Camb.) 18(18), 1740–1741 (2001).
[Crossref] [PubMed]

Ragni, R.

G. M. Farinola and R. Ragni, “Electroluminescent materials for white organic light emitting diodes,” Chem. Soc. Rev. 40(7), 3467–3482 (2011).
[Crossref] [PubMed]

Retailleau, P.

K. Benelhadj, W. Muzuzu, J. Massue, P. Retailleau, A. Charaf-Eddin, A. D. Laurent, D. Jacquemin, G. Ulrich, and R. Ziessel, “White Emitters by Tuning the Excited-State Intramolecular Proton-Transfer Fluorescence Emission in 2-(2′-Hydroxybenzofuran)benzoxazole Dyes,” Chem. Eur. J 20(40), 12843–12857 (2014).
[Crossref] [PubMed]

Sakai, K.

K. Sakai, T. Ishikawa, and T. Akutagawa, “A blue-white-yellow color-tunable excited state intramolecular proton transfer (ESIPT) fluorophore: sensitivity to polar–nonpolar solvent ratios,” J. Mater. Chem. C Mater. Opt. Electron. Devices 1(47), 7866 (2013).
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Samuel, I. D. W.

I. D. W. Samuel and G. A. Turnbull, “Organic Semiconductor Lasers,” Chem. Rev. 107(4), 1272–1295 (2007).
[Crossref] [PubMed]

Sasabe, H.

H. Sasabe and J. Kido, “Multifunctional Materials in High-Performance OLEDs: Challenges for Solid-State Lighting,” Chem. Mater. 23(3), 621–630 (2011).
[Crossref]

Y. Kawamura, H. Yamamoto, K. Goushi, H. Sasabe, C. Adachi, and H. Yoshizaki, “Ultraviolet amplified spontaneous emission from thin films of 4,4′-bis(9-carbazolyl)-2,2′- biphenyl and the derivatives,” Appl. Phys. Lett. 84(15), 2724–2726 (2004).
[Crossref]

Seki, S.

V. S. Padalkar and S. Seki, “Excited-state intramolecular proton-transfer (ESIPT)-inspired solid state emitters,” Chem. Soc. Rev. 45(1), 169–202 (2016).
[Crossref] [PubMed]

Semenova, I. S.

K. S. Levchenko, I. S. Semenova, V. N. Yarovenko, P. S. Shmelin, and M. M. Krayushkin, “Facile syntheses of 2-substituted 3-cyanochromones,” Tetrahedron Lett. 53(28), 3630–3632 (2012).
[Crossref]

Shin, I.

Z. Guo, S. Park, J. Yoon, and I. Shin, “Recent progress in the development of near-infrared fluorescent probes for bioimaging applications,” Chem. Soc. Rev. 43(1), 16–29 (2014).
[Crossref] [PubMed]

Shmelin, P. S.

K. S. Levchenko, I. S. Semenova, V. N. Yarovenko, P. S. Shmelin, and M. M. Krayushkin, “Facile syntheses of 2-substituted 3-cyanochromones,” Tetrahedron Lett. 53(28), 3630–3632 (2012).
[Crossref]

Sun, F. W.

C. Zhang, C. L. Zou, Y. Yan, R. Hao, F. W. Sun, Z. F. Han, Y. S. Zhao, and J. Yao, “Two-Photon Pumped Lasing in Single-Crystal Organic Nanowire Exciton Polariton Resonators,” J. Am. Chem. Soc. 133(19), 7276–7279 (2011).
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Tang, B. Z.

J. Mei, N. L. C. Leung, R. T. K. Kwok, J. W. Y. Lam, and B. Z. Tang, “Aggregation-Induced Emission: Together We Shine, United We Soar!” Chem. Rev. 115(21), 11718–11940 (2015).
[Crossref] [PubMed]

Z. Zhao, J. W. Y. Lam, and B. Z. Tang, “Tetraphenylethene: a versatile AIE building block for the construction of efficient luminescent materials for organic light-emitting diodes,” J. Mater. Chem. 22(45), 23726 (2012).
[Crossref]

Y. Hong, J. W. Lam, and B. Z. Tang, “Aggregation-induced emission,” Chem. Soc. Rev. 40(11), 5361–5388 (2011).
[Crossref] [PubMed]

J. Luo, Z. Xie, J. W. Y. Lam, L. Cheng, H. Chen, C. Qiu, H. S. Kwok, X. Zhan, Y. Liu, D. Zhu, and B. Z. Tang, “Aggregation-induced emission of 1-methyl-1,2,3,4,5-pentaphenylsilole,” Chem. Commun. (Camb.) 18(18), 1740–1741 (2001).
[Crossref] [PubMed]

Tang, K. C.

A. P. Demchenko, K. C. Tang, and P. T. Chou, “Excited-state proton coupled charge transfer modulated by molecular structure and media polarization,” Chem. Soc. Rev. 42(3), 1379–1408 (2013).
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T. Yanaia, D. P. Tew, and N. C. Handy, “A new hybrid exchange-correlation functional using the Coulomb-attenuating method (CAM-B3LYP),” Chem. Phys. Lett. 393(1-3), 51–57 (2004).
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Turnbull, G. A.

I. D. W. Samuel and G. A. Turnbull, “Organic Semiconductor Lasers,” Chem. Rev. 107(4), 1272–1295 (2007).
[Crossref] [PubMed]

Ulrich, G.

K. Benelhadj, W. Muzuzu, J. Massue, P. Retailleau, A. Charaf-Eddin, A. D. Laurent, D. Jacquemin, G. Ulrich, and R. Ziessel, “White Emitters by Tuning the Excited-State Intramolecular Proton-Transfer Fluorescence Emission in 2-(2′-Hydroxybenzofuran)benzoxazole Dyes,” Chem. Eur. J 20(40), 12843–12857 (2014).
[Crossref] [PubMed]

Wang, F.

F. Liang, L. Wang, D. Ma, X. Jing, and F. Wang, “Oxadiazole-containing material with intense blue phosphorescence emission for organic light-emitting diodes,” Appl. Phys. Lett. 81(1), 4–6 (2002).
[Crossref]

Wang, K.

X. Cheng, K. Wang, S. Huang, H. Zhang, H. Zhang, and Y. Wang, “Organic Crystals with Near-Infrared Amplified Spontaneous Emissions Based on 2′-Hydroxychalcone Derivatives: Subtle Structure Modification but Great Property Change,” Angew. Chem. Int. Ed. Engl. 54(29), 8369–8373 (2015).
[Crossref] [PubMed]

Wang, L.

F. Liang, L. Wang, D. Ma, X. Jing, and F. Wang, “Oxadiazole-containing material with intense blue phosphorescence emission for organic light-emitting diodes,” Appl. Phys. Lett. 81(1), 4–6 (2002).
[Crossref]

Wang, P.

J. Wu, W. Liu, J. Ge, H. Zhang, and P. Wang, “New sensing mechanisms for design of fluorescent chemosensors emerging in recent years,” Chem. Soc. Rev. 40(7), 3483–3495 (2011).
[Crossref] [PubMed]

Wang, Y.

X. Cheng, Y. Zhang, S. Han, F. Li, H. Zhang, and Y. Wang, “Multicolor Amplified Spontaneous Emissions Based on Organic Polymorphs That Undergo Excited-State Intramolecular Proton Transfer,” Chemistry 22(14), 4899–4903 (2016).
[Crossref] [PubMed]

X. Cheng, K. Wang, S. Huang, H. Zhang, H. Zhang, and Y. Wang, “Organic Crystals with Near-Infrared Amplified Spontaneous Emissions Based on 2′-Hydroxychalcone Derivatives: Subtle Structure Modification but Great Property Change,” Angew. Chem. Int. Ed. Engl. 54(29), 8369–8373 (2015).
[Crossref] [PubMed]

X. Cheng, F. Li, S. Han, Y. Zhang, C. Jiao, J. Wei, K. Ye, Y. Wang, and H. Zhang, “Emission behaviors of unsymmetrical 1,3-diaryl-β-diketones: A model perfectly disclosing the effect of molecular conformation on luminescence of organic solids,” Sci. Rep. 5(1), 9140 (2015).
[Crossref] [PubMed]

Watson, M. D.

T. Dutta, K. B. Woody, S. R. Parkin, M. D. Watson, and J. Gierschner, “Conjugated Polymers with Large Effective Stokes Shift: Benzobisdioxole-Based Poly(phenylene ethynylene)s,” J. Am. Chem. Soc. 131(47), 17321–17327 (2009).
[Crossref] [PubMed]

Wei, J.

X. Cheng, F. Li, S. Han, Y. Zhang, C. Jiao, J. Wei, K. Ye, Y. Wang, and H. Zhang, “Emission behaviors of unsymmetrical 1,3-diaryl-β-diketones: A model perfectly disclosing the effect of molecular conformation on luminescence of organic solids,” Sci. Rep. 5(1), 9140 (2015).
[Crossref] [PubMed]

Whang, D. R.

S. Park, J. E. Kwon, S. Y. Park, O. H. Kwon, J. K. Kim, S. J. Yoon, J. W. Chung, D. R. Whang, S. K. Park, D. K. Lee, D. J. Jang, J. Gierschner, and S. Y. Park, “Crystallization‐Induced Emission Enhancement and Amplified Spontaneous Emission from a CF3‐Containing Excited‐State Intramolecular‐Proton‐Transfer Molecule,” Adv. Opt. Mater. 5(18), 1700353 (2017).
[Crossref]

Woody, K. B.

T. Dutta, K. B. Woody, S. R. Parkin, M. D. Watson, and J. Gierschner, “Conjugated Polymers with Large Effective Stokes Shift: Benzobisdioxole-Based Poly(phenylene ethynylene)s,” J. Am. Chem. Soc. 131(47), 17321–17327 (2009).
[Crossref] [PubMed]

Wu, J.

J. Wu, W. Liu, J. Ge, H. Zhang, and P. Wang, “New sensing mechanisms for design of fluorescent chemosensors emerging in recent years,” Chem. Soc. Rev. 40(7), 3483–3495 (2011).
[Crossref] [PubMed]

Xie, Z.

J. Luo, Z. Xie, J. W. Y. Lam, L. Cheng, H. Chen, C. Qiu, H. S. Kwok, X. Zhan, Y. Liu, D. Zhu, and B. Z. Tang, “Aggregation-induced emission of 1-methyl-1,2,3,4,5-pentaphenylsilole,” Chem. Commun. (Camb.) 18(18), 1740–1741 (2001).
[Crossref] [PubMed]

Xu, Z. C.

X. L. Liu, J. M. Cole, and Z. C. Xu, “Substantial Intramolecular Charge Transfer Induces Long Emission Wavelengths and Mega Stokes Shifts in 6-Aminocoumarins,” J. Phys. Chem. C 121(24), 13274–13279 (2017).
[Crossref]

X. L. Liu, Z. C. Xu, and J. M. Cole, “Molecular Design of UV-vis Absorption and Emission Properties in Organic Fluorophores: Toward Larger Bathochromic Shifts, Enhanced Molar Extinction Coefficients, and Greater Stokes Shifts,” J. Phys. Chem. C 117(32), 16584–16595 (2013).
[Crossref]

Yamamoto, H.

Y. Kawamura, H. Yamamoto, K. Goushi, H. Sasabe, C. Adachi, and H. Yoshizaki, “Ultraviolet amplified spontaneous emission from thin films of 4,4′-bis(9-carbazolyl)-2,2′- biphenyl and the derivatives,” Appl. Phys. Lett. 84(15), 2724–2726 (2004).
[Crossref]

Yan, Y.

W. Zhang, Y. Yan, J. Gu, J. Yao, and Y. S. Zhao, “Low-Threshold Wavelength-Switchable Organic Nanowire Lasers Based on Excited-State Intramolecular Proton Transfer,” Angew. Chem. Int. Ed. Engl. 54(24), 7125–7129 (2015).
[Crossref] [PubMed]

C. Zhang, C. L. Zou, Y. Yan, R. Hao, F. W. Sun, Z. F. Han, Y. S. Zhao, and J. Yao, “Two-Photon Pumped Lasing in Single-Crystal Organic Nanowire Exciton Polariton Resonators,” J. Am. Chem. Soc. 133(19), 7276–7279 (2011).
[Crossref] [PubMed]

Yanaia, T.

T. Yanaia, D. P. Tew, and N. C. Handy, “A new hybrid exchange-correlation functional using the Coulomb-attenuating method (CAM-B3LYP),” Chem. Phys. Lett. 393(1-3), 51–57 (2004).
[Crossref]

Yang, P.

J. Zhao, S. Ji, Y. Chen, H. Guo, and P. Yang, “Excited state intramolecular proton transfer (ESIPT): from principal photophysics to the development of new chromophores and applications in fluorescent molecular probes and luminescent materials,” Phys. Chem. Chem. Phys. 14(25), 8803–8817 (2012).
[Crossref] [PubMed]

Yao, J.

W. Zhang, Y. Yan, J. Gu, J. Yao, and Y. S. Zhao, “Low-Threshold Wavelength-Switchable Organic Nanowire Lasers Based on Excited-State Intramolecular Proton Transfer,” Angew. Chem. Int. Ed. Engl. 54(24), 7125–7129 (2015).
[Crossref] [PubMed]

C. Zhang, C. L. Zou, Y. Yan, R. Hao, F. W. Sun, Z. F. Han, Y. S. Zhao, and J. Yao, “Two-Photon Pumped Lasing in Single-Crystal Organic Nanowire Exciton Polariton Resonators,” J. Am. Chem. Soc. 133(19), 7276–7279 (2011).
[Crossref] [PubMed]

Yarovenko, V. N.

K. S. Levchenko, I. S. Semenova, V. N. Yarovenko, P. S. Shmelin, and M. M. Krayushkin, “Facile syntheses of 2-substituted 3-cyanochromones,” Tetrahedron Lett. 53(28), 3630–3632 (2012).
[Crossref]

Ye, K.

X. Cheng, F. Li, S. Han, Y. Zhang, C. Jiao, J. Wei, K. Ye, Y. Wang, and H. Zhang, “Emission behaviors of unsymmetrical 1,3-diaryl-β-diketones: A model perfectly disclosing the effect of molecular conformation on luminescence of organic solids,” Sci. Rep. 5(1), 9140 (2015).
[Crossref] [PubMed]

Yoon, J.

Z. Guo, S. Park, J. Yoon, and I. Shin, “Recent progress in the development of near-infrared fluorescent probes for bioimaging applications,” Chem. Soc. Rev. 43(1), 16–29 (2014).
[Crossref] [PubMed]

Yoon, S. J.

S. Park, J. E. Kwon, S. Y. Park, O. H. Kwon, J. K. Kim, S. J. Yoon, J. W. Chung, D. R. Whang, S. K. Park, D. K. Lee, D. J. Jang, J. Gierschner, and S. Y. Park, “Crystallization‐Induced Emission Enhancement and Amplified Spontaneous Emission from a CF3‐Containing Excited‐State Intramolecular‐Proton‐Transfer Molecule,” Adv. Opt. Mater. 5(18), 1700353 (2017).
[Crossref]

Yoshizaki, H.

Y. Kawamura, H. Yamamoto, K. Goushi, H. Sasabe, C. Adachi, and H. Yoshizaki, “Ultraviolet amplified spontaneous emission from thin films of 4,4′-bis(9-carbazolyl)-2,2′- biphenyl and the derivatives,” Appl. Phys. Lett. 84(15), 2724–2726 (2004).
[Crossref]

Young, A. M.

K. P. Carter, A. M. Young, and A. E. Palmer, “Fluorescent Sensors for Measuring Metal Ions in Living Systems,” Chem. Rev. 114(8), 4564–4601 (2014).
[Crossref] [PubMed]

Zhan, X.

J. Luo, Z. Xie, J. W. Y. Lam, L. Cheng, H. Chen, C. Qiu, H. S. Kwok, X. Zhan, Y. Liu, D. Zhu, and B. Z. Tang, “Aggregation-induced emission of 1-methyl-1,2,3,4,5-pentaphenylsilole,” Chem. Commun. (Camb.) 18(18), 1740–1741 (2001).
[Crossref] [PubMed]

Zhang, C.

C. Zhang, C. L. Zou, Y. Yan, R. Hao, F. W. Sun, Z. F. Han, Y. S. Zhao, and J. Yao, “Two-Photon Pumped Lasing in Single-Crystal Organic Nanowire Exciton Polariton Resonators,” J. Am. Chem. Soc. 133(19), 7276–7279 (2011).
[Crossref] [PubMed]

Zhang, H.

X. Cheng, Y. Zhang, S. Han, F. Li, H. Zhang, and Y. Wang, “Multicolor Amplified Spontaneous Emissions Based on Organic Polymorphs That Undergo Excited-State Intramolecular Proton Transfer,” Chemistry 22(14), 4899–4903 (2016).
[Crossref] [PubMed]

X. Cheng, F. Li, S. Han, Y. Zhang, C. Jiao, J. Wei, K. Ye, Y. Wang, and H. Zhang, “Emission behaviors of unsymmetrical 1,3-diaryl-β-diketones: A model perfectly disclosing the effect of molecular conformation on luminescence of organic solids,” Sci. Rep. 5(1), 9140 (2015).
[Crossref] [PubMed]

X. Cheng, K. Wang, S. Huang, H. Zhang, H. Zhang, and Y. Wang, “Organic Crystals with Near-Infrared Amplified Spontaneous Emissions Based on 2′-Hydroxychalcone Derivatives: Subtle Structure Modification but Great Property Change,” Angew. Chem. Int. Ed. Engl. 54(29), 8369–8373 (2015).
[Crossref] [PubMed]

X. Cheng, K. Wang, S. Huang, H. Zhang, H. Zhang, and Y. Wang, “Organic Crystals with Near-Infrared Amplified Spontaneous Emissions Based on 2′-Hydroxychalcone Derivatives: Subtle Structure Modification but Great Property Change,” Angew. Chem. Int. Ed. Engl. 54(29), 8369–8373 (2015).
[Crossref] [PubMed]

J. Wu, W. Liu, J. Ge, H. Zhang, and P. Wang, “New sensing mechanisms for design of fluorescent chemosensors emerging in recent years,” Chem. Soc. Rev. 40(7), 3483–3495 (2011).
[Crossref] [PubMed]

Zhang, W.

W. Zhang, Y. Yan, J. Gu, J. Yao, and Y. S. Zhao, “Low-Threshold Wavelength-Switchable Organic Nanowire Lasers Based on Excited-State Intramolecular Proton Transfer,” Angew. Chem. Int. Ed. Engl. 54(24), 7125–7129 (2015).
[Crossref] [PubMed]

Zhang, Y.

X. Cheng, Y. Zhang, S. Han, F. Li, H. Zhang, and Y. Wang, “Multicolor Amplified Spontaneous Emissions Based on Organic Polymorphs That Undergo Excited-State Intramolecular Proton Transfer,” Chemistry 22(14), 4899–4903 (2016).
[Crossref] [PubMed]

X. Cheng, F. Li, S. Han, Y. Zhang, C. Jiao, J. Wei, K. Ye, Y. Wang, and H. Zhang, “Emission behaviors of unsymmetrical 1,3-diaryl-β-diketones: A model perfectly disclosing the effect of molecular conformation on luminescence of organic solids,” Sci. Rep. 5(1), 9140 (2015).
[Crossref] [PubMed]

Zhao, J.

J. Zhao, S. Ji, Y. Chen, H. Guo, and P. Yang, “Excited state intramolecular proton transfer (ESIPT): from principal photophysics to the development of new chromophores and applications in fluorescent molecular probes and luminescent materials,” Phys. Chem. Chem. Phys. 14(25), 8803–8817 (2012).
[Crossref] [PubMed]

Zhao, Y. S.

W. Zhang, Y. Yan, J. Gu, J. Yao, and Y. S. Zhao, “Low-Threshold Wavelength-Switchable Organic Nanowire Lasers Based on Excited-State Intramolecular Proton Transfer,” Angew. Chem. Int. Ed. Engl. 54(24), 7125–7129 (2015).
[Crossref] [PubMed]

C. Zhang, C. L. Zou, Y. Yan, R. Hao, F. W. Sun, Z. F. Han, Y. S. Zhao, and J. Yao, “Two-Photon Pumped Lasing in Single-Crystal Organic Nanowire Exciton Polariton Resonators,” J. Am. Chem. Soc. 133(19), 7276–7279 (2011).
[Crossref] [PubMed]

Zhao, Z.

Z. Zhao, J. W. Y. Lam, and B. Z. Tang, “Tetraphenylethene: a versatile AIE building block for the construction of efficient luminescent materials for organic light-emitting diodes,” J. Mater. Chem. 22(45), 23726 (2012).
[Crossref]

Zhu, D.

J. Luo, Z. Xie, J. W. Y. Lam, L. Cheng, H. Chen, C. Qiu, H. S. Kwok, X. Zhan, Y. Liu, D. Zhu, and B. Z. Tang, “Aggregation-induced emission of 1-methyl-1,2,3,4,5-pentaphenylsilole,” Chem. Commun. (Camb.) 18(18), 1740–1741 (2001).
[Crossref] [PubMed]

Ziessel, R.

K. Benelhadj, W. Muzuzu, J. Massue, P. Retailleau, A. Charaf-Eddin, A. D. Laurent, D. Jacquemin, G. Ulrich, and R. Ziessel, “White Emitters by Tuning the Excited-State Intramolecular Proton-Transfer Fluorescence Emission in 2-(2′-Hydroxybenzofuran)benzoxazole Dyes,” Chem. Eur. J 20(40), 12843–12857 (2014).
[Crossref] [PubMed]

Zou, C. L.

C. Zhang, C. L. Zou, Y. Yan, R. Hao, F. W. Sun, Z. F. Han, Y. S. Zhao, and J. Yao, “Two-Photon Pumped Lasing in Single-Crystal Organic Nanowire Exciton Polariton Resonators,” J. Am. Chem. Soc. 133(19), 7276–7279 (2011).
[Crossref] [PubMed]

Acc. Chem. Res. (1)

B. K. An, J. Gierschner, and S. Y. Park, “π-Conjugated Cyanostilbene Derivatives: A Unique Self-Assembly Motif for Molecular Nanostructures with Enhanced Emission and Transport,” Acc. Chem. Res. 45(4), 544–554 (2012).
[Crossref] [PubMed]

Adv. Mater. (2)

J. E. Kwon and S. Y. Park, “Advanced Organic Optoelectronic Materials: Harnessing Excited-State Intramolecular Proton Transfer (ESIPT) Process,” Adv. Mater. 23(32), 3615–3642 (2011).
[Crossref] [PubMed]

K. T. Kamtekar, A. P. Monkman, and M. R. Bryce, “Ordered Materials for Organic Electronics and Photonics,” Adv. Mater. 22, 572 (2010).
[Crossref] [PubMed]

Adv. Opt. Mater. (1)

S. Park, J. E. Kwon, S. Y. Park, O. H. Kwon, J. K. Kim, S. J. Yoon, J. W. Chung, D. R. Whang, S. K. Park, D. K. Lee, D. J. Jang, J. Gierschner, and S. Y. Park, “Crystallization‐Induced Emission Enhancement and Amplified Spontaneous Emission from a CF3‐Containing Excited‐State Intramolecular‐Proton‐Transfer Molecule,” Adv. Opt. Mater. 5(18), 1700353 (2017).
[Crossref]

Angew. Chem. Int. Ed. Engl. (2)

X. Cheng, K. Wang, S. Huang, H. Zhang, H. Zhang, and Y. Wang, “Organic Crystals with Near-Infrared Amplified Spontaneous Emissions Based on 2′-Hydroxychalcone Derivatives: Subtle Structure Modification but Great Property Change,” Angew. Chem. Int. Ed. Engl. 54(29), 8369–8373 (2015).
[Crossref] [PubMed]

W. Zhang, Y. Yan, J. Gu, J. Yao, and Y. S. Zhao, “Low-Threshold Wavelength-Switchable Organic Nanowire Lasers Based on Excited-State Intramolecular Proton Transfer,” Angew. Chem. Int. Ed. Engl. 54(24), 7125–7129 (2015).
[Crossref] [PubMed]

Appl. Phys. Lett. (2)

Y. Kawamura, H. Yamamoto, K. Goushi, H. Sasabe, C. Adachi, and H. Yoshizaki, “Ultraviolet amplified spontaneous emission from thin films of 4,4′-bis(9-carbazolyl)-2,2′- biphenyl and the derivatives,” Appl. Phys. Lett. 84(15), 2724–2726 (2004).
[Crossref]

F. Liang, L. Wang, D. Ma, X. Jing, and F. Wang, “Oxadiazole-containing material with intense blue phosphorescence emission for organic light-emitting diodes,” Appl. Phys. Lett. 81(1), 4–6 (2002).
[Crossref]

Chem. Commun. (Camb.) (1)

J. Luo, Z. Xie, J. W. Y. Lam, L. Cheng, H. Chen, C. Qiu, H. S. Kwok, X. Zhan, Y. Liu, D. Zhu, and B. Z. Tang, “Aggregation-induced emission of 1-methyl-1,2,3,4,5-pentaphenylsilole,” Chem. Commun. (Camb.) 18(18), 1740–1741 (2001).
[Crossref] [PubMed]

Chem. Eur. J (1)

K. Benelhadj, W. Muzuzu, J. Massue, P. Retailleau, A. Charaf-Eddin, A. D. Laurent, D. Jacquemin, G. Ulrich, and R. Ziessel, “White Emitters by Tuning the Excited-State Intramolecular Proton-Transfer Fluorescence Emission in 2-(2′-Hydroxybenzofuran)benzoxazole Dyes,” Chem. Eur. J 20(40), 12843–12857 (2014).
[Crossref] [PubMed]

Chem. Mater. (1)

H. Sasabe and J. Kido, “Multifunctional Materials in High-Performance OLEDs: Challenges for Solid-State Lighting,” Chem. Mater. 23(3), 621–630 (2011).
[Crossref]

Chem. Phys. Lett. (1)

T. Yanaia, D. P. Tew, and N. C. Handy, “A new hybrid exchange-correlation functional using the Coulomb-attenuating method (CAM-B3LYP),” Chem. Phys. Lett. 393(1-3), 51–57 (2004).
[Crossref]

Chem. Rev. (4)

J. Mei, N. L. C. Leung, R. T. K. Kwok, J. W. Y. Lam, and B. Z. Tang, “Aggregation-Induced Emission: Together We Shine, United We Soar!” Chem. Rev. 115(21), 11718–11940 (2015).
[Crossref] [PubMed]

K. P. Carter, A. M. Young, and A. E. Palmer, “Fluorescent Sensors for Measuring Metal Ions in Living Systems,” Chem. Rev. 114(8), 4564–4601 (2014).
[Crossref] [PubMed]

I. D. W. Samuel and G. A. Turnbull, “Organic Semiconductor Lasers,” Chem. Rev. 107(4), 1272–1295 (2007).
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A. J. C. Kuehne and M. C. Gather, “Organic Lasers: Recent Developments on Materials, Device Geometries, and Fabrication Techniques,” Chem. Rev. 116(21), 12823–12864 (2016).
[Crossref] [PubMed]

Chem. Soc. Rev. (6)

Z. Guo, S. Park, J. Yoon, and I. Shin, “Recent progress in the development of near-infrared fluorescent probes for bioimaging applications,” Chem. Soc. Rev. 43(1), 16–29 (2014).
[Crossref] [PubMed]

Y. Hong, J. W. Lam, and B. Z. Tang, “Aggregation-induced emission,” Chem. Soc. Rev. 40(11), 5361–5388 (2011).
[Crossref] [PubMed]

G. M. Farinola and R. Ragni, “Electroluminescent materials for white organic light emitting diodes,” Chem. Soc. Rev. 40(7), 3467–3482 (2011).
[Crossref] [PubMed]

V. S. Padalkar and S. Seki, “Excited-state intramolecular proton-transfer (ESIPT)-inspired solid state emitters,” Chem. Soc. Rev. 45(1), 169–202 (2016).
[Crossref] [PubMed]

A. P. Demchenko, K. C. Tang, and P. T. Chou, “Excited-state proton coupled charge transfer modulated by molecular structure and media polarization,” Chem. Soc. Rev. 42(3), 1379–1408 (2013).
[Crossref] [PubMed]

J. Wu, W. Liu, J. Ge, H. Zhang, and P. Wang, “New sensing mechanisms for design of fluorescent chemosensors emerging in recent years,” Chem. Soc. Rev. 40(7), 3483–3495 (2011).
[Crossref] [PubMed]

Chemistry (1)

X. Cheng, Y. Zhang, S. Han, F. Li, H. Zhang, and Y. Wang, “Multicolor Amplified Spontaneous Emissions Based on Organic Polymorphs That Undergo Excited-State Intramolecular Proton Transfer,” Chemistry 22(14), 4899–4903 (2016).
[Crossref] [PubMed]

J. Am. Chem. Soc. (3)

S. Park, O. H. Kwon, S. Kim, S. Park, M. G. Choi, M. Cha, S. Y. Park, and D. J. Jang, “Imidazole-Based Excited-State Intramolecular Proton-Transfer Materials: Synthesis and Amplified Spontaneous Emission from A Large Single Crystal,” J. Am. Chem. Soc. 127(28), 10070–10074 (2005).
[Crossref] [PubMed]

C. Zhang, C. L. Zou, Y. Yan, R. Hao, F. W. Sun, Z. F. Han, Y. S. Zhao, and J. Yao, “Two-Photon Pumped Lasing in Single-Crystal Organic Nanowire Exciton Polariton Resonators,” J. Am. Chem. Soc. 133(19), 7276–7279 (2011).
[Crossref] [PubMed]

T. Dutta, K. B. Woody, S. R. Parkin, M. D. Watson, and J. Gierschner, “Conjugated Polymers with Large Effective Stokes Shift: Benzobisdioxole-Based Poly(phenylene ethynylene)s,” J. Am. Chem. Soc. 131(47), 17321–17327 (2009).
[Crossref] [PubMed]

J. Mater. Chem. (1)

Z. Zhao, J. W. Y. Lam, and B. Z. Tang, “Tetraphenylethene: a versatile AIE building block for the construction of efficient luminescent materials for organic light-emitting diodes,” J. Mater. Chem. 22(45), 23726 (2012).
[Crossref]

J. Mater. Chem. C Mater. Opt. Electron. Devices (1)

K. Sakai, T. Ishikawa, and T. Akutagawa, “A blue-white-yellow color-tunable excited state intramolecular proton transfer (ESIPT) fluorophore: sensitivity to polar–nonpolar solvent ratios,” J. Mater. Chem. C Mater. Opt. Electron. Devices 1(47), 7866 (2013).
[Crossref]

J. Phys. Chem. C (2)

X. L. Liu, Z. C. Xu, and J. M. Cole, “Molecular Design of UV-vis Absorption and Emission Properties in Organic Fluorophores: Toward Larger Bathochromic Shifts, Enhanced Molar Extinction Coefficients, and Greater Stokes Shifts,” J. Phys. Chem. C 117(32), 16584–16595 (2013).
[Crossref]

X. L. Liu, J. M. Cole, and Z. C. Xu, “Substantial Intramolecular Charge Transfer Induces Long Emission Wavelengths and Mega Stokes Shifts in 6-Aminocoumarins,” J. Phys. Chem. C 121(24), 13274–13279 (2017).
[Crossref]

Phys. Chem. Chem. Phys. (1)

J. Zhao, S. Ji, Y. Chen, H. Guo, and P. Yang, “Excited state intramolecular proton transfer (ESIPT): from principal photophysics to the development of new chromophores and applications in fluorescent molecular probes and luminescent materials,” Phys. Chem. Chem. Phys. 14(25), 8803–8817 (2012).
[Crossref] [PubMed]

Sci. Rep. (1)

X. Cheng, F. Li, S. Han, Y. Zhang, C. Jiao, J. Wei, K. Ye, Y. Wang, and H. Zhang, “Emission behaviors of unsymmetrical 1,3-diaryl-β-diketones: A model perfectly disclosing the effect of molecular conformation on luminescence of organic solids,” Sci. Rep. 5(1), 9140 (2015).
[Crossref] [PubMed]

Tetrahedron Lett. (1)

K. S. Levchenko, I. S. Semenova, V. N. Yarovenko, P. S. Shmelin, and M. M. Krayushkin, “Facile syntheses of 2-substituted 3-cyanochromones,” Tetrahedron Lett. 53(28), 3630–3632 (2012).
[Crossref]

Other (1)

B. Z. Tang and A. Qin, Aggregation-Induced Emission: Fundamentals and Applications, Vol. 1 and 2, John Wiley & Sons, Chichester, UK 2013.

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Figures (4)

Fig. 1
Fig. 1 (a) Schematic diagram of ESIPT photocycle. (b) Normalized absorption (blue) and emission spectra (green) in CHCl3 (1 × 105 M) and emission spectra (red) for doped thin-film of DHP. The inset demonstrates the chemical structure of DHP.
Fig. 2
Fig. 2 (a) Normalized PL decay transients for DHP in doped thin-film. (b) Normalized PL decay transients for DHP in CHCl3 solution (1 × 105 M) of E* form. (c) Normalized PL decay transients for DHP in CHCl3 solution (1 × 105 M) K* form.
Fig. 3
Fig. 3 (a) Optimized geometries for DHP. (b) Potential energy surfaces in the gas phase and representation of the LE and ESIPT states of DHP .
Fig. 4
Fig. 4 (a) The edge-emission spectra of doped thin-films for DHP excited by different energy. Output intensity at λASE. (b) Full Widths at Half-maximum (FWHM) as a function of pump energy for DHP.

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