Abstract

Effects of high pressure in a range of up to 1.7 GPa on ultrafast energy relaxation of LDS698 (C19H23N2O4Cl) molecules in solution have experimentally been illustrated by a method of femtosecond time-resolved absorption spectroscopy. The rates of the intramolecular and intermolecular energy relaxations show quite different pressure dependences. The observed results are in good agreement with the theoretical interpretation based on the pressure influences on the molecular energy gaps, the intermolecular H-bond interaction, and the solution viscosity.

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  1. S. Woutersen and H. J. Bakker, “Resonant intermolecular transfer of vibrational energy in liquid water,” Nature 402(6761), 507–509 (1999).
    [CrossRef]
  2. C. Chudoba, E. T. J. Nibbering, and T. Elsaesser, “Site-specific excited-state solute-solvent interactions probed by femtosecond vibrational spectroscopy,” Phys. Rev. Lett. 81(14), 3010–3013 (1998).
    [CrossRef]
  3. J. Assmann, R. V. Benten, A. Charvat, and B. Abel, “Vibrational energy relaxation of selectively excited aromatic molecules in solution: The effect of a methyl rotor and its chemical substitution,” J. Phys. Chem. A 107(12), 1904–1913 (2003).
    [CrossRef]
  4. S. H. Lin, “Rate of interconversion of electronic and vibrational energy,” J. Chem. Phys. 44(10), 3759–3767 (1966).
    [CrossRef]
  5. T. Kobayashi, M. Shiga, A. Murakami, and S. J. Nakamura, “Ab initio study of ultrafast photochemical reaction dynamics of phenol blue,” J. Am. Chem. Soc. 129(20), 6405–6424 (2007).
    [CrossRef] [PubMed]
  6. R. M. Stratt and M. Maroncelli, “Nonreactive dynamics in solution: the emerging molecular view of solvation dynamics and vibrational relaxation,” J. Phys. Chem. 100(31), 12981–12996 (1996).
    [CrossRef]
  7. J. Y. Liu, W. H. Fan, K. L. Han, D. L. Xu, and N. Q. Lou, “Ultrafast dynamics of dye molecules in solution as a function of temperature,” J. Phys. Chem. A 107(12), 1914–1917 (2003).
    [CrossRef]
  8. J. Y. Liu, W. H. Fan, K. L. Han, W. Q. Deng, D. L. Xu, and N. Q. Lou, “Ultrafast vibrational and thermal relaxation of dye molecules in solutions,” J. Phys. Chem. A 107(50), 10857–10861 (2003).
    [CrossRef]
  9. K. Niss, B. Begen, B. Frick, J. Ollivier, A. Beraud, A. Sokolov, V. N. Novikov, and C. Alba-Simionesco, “Influence of pressure on the boson peak: stronger than elastic medium transformation,” Phys. Rev. Lett. 99(5), 055502 (2007).
    [CrossRef] [PubMed]
  10. D. J. Mitchell, G. B. Schuster, and H. G. Drickamer, “Effect of pressure on the fluorescence of 9-carbonyl substituted anthracenes,” J. Am. Chem. Soc. 99(4), 1145–1148 (1977).
    [CrossRef]
  11. H. Li, B. Zhong, L. M. He, G. Q. Yang, Y. Li, S. Wu, and J. Liu, “High pressure effects on the luminescent properties and structure of coumarin 153,” Appl. Phys. Lett. 80(13), 2299–2301 (2002).
    [CrossRef]
  12. B. C. Hess, G. S. Kanner, Z. V. Vardeny, and G. L. Baker, “High-pressure effects on ultrafast-relaxation kinetics of excitons in polydiacetylene 4BCMU,” Phys. Rev. Lett. 66(18), 2364–2367 (1991).
    [CrossRef] [PubMed]
  13. N. Baden, O. Kajimoto, and K. Hara, “High-pressure studies on aggregation number of surfactant micelles using the fluorescence quenching method,” J. Phys. Chem. B 106(34), 8621–8624 (2002).
    [CrossRef]
  14. S. Bai and C. R. Yonker, “Pressure and temperature effects on the hydrogen-bond structures of liquid and supercritical fluid methanol,” J. Phys. Chem. A 102(45), 8641–8647 (1998).
    [CrossRef]
  15. J. P. Schmidtke, J. S. Kim, J. Gierschner, C. Silva, and R. H. Friend, “Optical spectroscopy of a polyfluorene copolymer at high pressure: intra- and intermolecular interactions,” Phys. Rev. Lett. 99(16), 167401 (2007).
    [CrossRef] [PubMed]
  16. Y. Umebayashi, J. C. Jiang, Y. L. Shan, K. H. Lin, K. Fujii, S. Seki, S. I. Ishiguro, S. H. Lin, and H. C. Chang, “Structural change of ionic association in ionic liquid/water mixtures: a high-pressure infrared spectroscopic study,” J. Chem. Phys. 130(12), 124503 (2009).
    [CrossRef] [PubMed]
  17. D. Ducoulombier, H. Zhou, C. Boned, J. Peyrelasse, H. Saint-Guirons, and P. Xans, “Pressure (1-1000bar) and temperature (20-100oC) dependence of the viscosity of liquid hydrocarbons,” J. Phys. Chem. 90(8), 1692–1700 (1986).
    [CrossRef]
  18. S. H. Lin, “Effect of high pressure on molecular electronic spectra and electronic relaxation,” J. Chem. Phys. 59(8), 4458–4467 (1973).
    [CrossRef]
  19. R. J. Hemley, P. M. Bell, and H. K. Mao, “Laser Techniques in High-Pressure Geophysics,” Science 237(4815), 605–612 (1987).
    [CrossRef] [PubMed]
  20. B. G. Liu, M. X. Jin, H. Liu, C. Y. He, D. W. Jiang, and D. Ding, “Femtosecond time-resolved measurement of LDS698 molecular processes under high pressure,” Appl. Phys. Lett. 92(24), 241916 (2008).
    [CrossRef]
  21. H. G. Drickamer, and C. W. Frank, “Electronic transitions and the high pressure chemistry and physics of solids” (Chapman-Hall, London, 1973).
  22. M. Dantus, M. J. Rosker, and A. H. Zewail, “Real-time femtosecond probing of transition-states in chemical-reactions,” J. Chem. Phys. 87(4), 2395–2397 (1987).
    [CrossRef]
  23. S. H. Lin, C. H. Chang, K. K. Liang, R. Chang, Y. J. Shiu, J. M. Zhang, T. S. Yang, M. Hayashi, and F. C. Hsu, “Ultrafast dynamics and spectroscopy of bacterial photosynthetic reaction centers,” Adv. Chem. Phys. 121, 1–88 (2002).
    [CrossRef]
  24. T. Förster, “Transfer mechanisms of electronic excitation,” Discuss. Faraday Soc. 27, 7–17 (1959).
  25. J. M. Brown, L. J. Slutsky, K. A. Nelson, and L. T. Cheng, “Velocity of sound and equations of state for methanol and ethanol in a diamond-anvil cell,” Science 241(4861), 65–67 (1988).
    [CrossRef] [PubMed]

2009

Y. Umebayashi, J. C. Jiang, Y. L. Shan, K. H. Lin, K. Fujii, S. Seki, S. I. Ishiguro, S. H. Lin, and H. C. Chang, “Structural change of ionic association in ionic liquid/water mixtures: a high-pressure infrared spectroscopic study,” J. Chem. Phys. 130(12), 124503 (2009).
[CrossRef] [PubMed]

2008

B. G. Liu, M. X. Jin, H. Liu, C. Y. He, D. W. Jiang, and D. Ding, “Femtosecond time-resolved measurement of LDS698 molecular processes under high pressure,” Appl. Phys. Lett. 92(24), 241916 (2008).
[CrossRef]

2007

J. P. Schmidtke, J. S. Kim, J. Gierschner, C. Silva, and R. H. Friend, “Optical spectroscopy of a polyfluorene copolymer at high pressure: intra- and intermolecular interactions,” Phys. Rev. Lett. 99(16), 167401 (2007).
[CrossRef] [PubMed]

K. Niss, B. Begen, B. Frick, J. Ollivier, A. Beraud, A. Sokolov, V. N. Novikov, and C. Alba-Simionesco, “Influence of pressure on the boson peak: stronger than elastic medium transformation,” Phys. Rev. Lett. 99(5), 055502 (2007).
[CrossRef] [PubMed]

T. Kobayashi, M. Shiga, A. Murakami, and S. J. Nakamura, “Ab initio study of ultrafast photochemical reaction dynamics of phenol blue,” J. Am. Chem. Soc. 129(20), 6405–6424 (2007).
[CrossRef] [PubMed]

2003

J. Y. Liu, W. H. Fan, K. L. Han, D. L. Xu, and N. Q. Lou, “Ultrafast dynamics of dye molecules in solution as a function of temperature,” J. Phys. Chem. A 107(12), 1914–1917 (2003).
[CrossRef]

J. Y. Liu, W. H. Fan, K. L. Han, W. Q. Deng, D. L. Xu, and N. Q. Lou, “Ultrafast vibrational and thermal relaxation of dye molecules in solutions,” J. Phys. Chem. A 107(50), 10857–10861 (2003).
[CrossRef]

J. Assmann, R. V. Benten, A. Charvat, and B. Abel, “Vibrational energy relaxation of selectively excited aromatic molecules in solution: The effect of a methyl rotor and its chemical substitution,” J. Phys. Chem. A 107(12), 1904–1913 (2003).
[CrossRef]

2002

H. Li, B. Zhong, L. M. He, G. Q. Yang, Y. Li, S. Wu, and J. Liu, “High pressure effects on the luminescent properties and structure of coumarin 153,” Appl. Phys. Lett. 80(13), 2299–2301 (2002).
[CrossRef]

N. Baden, O. Kajimoto, and K. Hara, “High-pressure studies on aggregation number of surfactant micelles using the fluorescence quenching method,” J. Phys. Chem. B 106(34), 8621–8624 (2002).
[CrossRef]

S. H. Lin, C. H. Chang, K. K. Liang, R. Chang, Y. J. Shiu, J. M. Zhang, T. S. Yang, M. Hayashi, and F. C. Hsu, “Ultrafast dynamics and spectroscopy of bacterial photosynthetic reaction centers,” Adv. Chem. Phys. 121, 1–88 (2002).
[CrossRef]

1999

S. Woutersen and H. J. Bakker, “Resonant intermolecular transfer of vibrational energy in liquid water,” Nature 402(6761), 507–509 (1999).
[CrossRef]

1998

C. Chudoba, E. T. J. Nibbering, and T. Elsaesser, “Site-specific excited-state solute-solvent interactions probed by femtosecond vibrational spectroscopy,” Phys. Rev. Lett. 81(14), 3010–3013 (1998).
[CrossRef]

S. Bai and C. R. Yonker, “Pressure and temperature effects on the hydrogen-bond structures of liquid and supercritical fluid methanol,” J. Phys. Chem. A 102(45), 8641–8647 (1998).
[CrossRef]

1996

R. M. Stratt and M. Maroncelli, “Nonreactive dynamics in solution: the emerging molecular view of solvation dynamics and vibrational relaxation,” J. Phys. Chem. 100(31), 12981–12996 (1996).
[CrossRef]

1991

B. C. Hess, G. S. Kanner, Z. V. Vardeny, and G. L. Baker, “High-pressure effects on ultrafast-relaxation kinetics of excitons in polydiacetylene 4BCMU,” Phys. Rev. Lett. 66(18), 2364–2367 (1991).
[CrossRef] [PubMed]

1988

J. M. Brown, L. J. Slutsky, K. A. Nelson, and L. T. Cheng, “Velocity of sound and equations of state for methanol and ethanol in a diamond-anvil cell,” Science 241(4861), 65–67 (1988).
[CrossRef] [PubMed]

1987

R. J. Hemley, P. M. Bell, and H. K. Mao, “Laser Techniques in High-Pressure Geophysics,” Science 237(4815), 605–612 (1987).
[CrossRef] [PubMed]

M. Dantus, M. J. Rosker, and A. H. Zewail, “Real-time femtosecond probing of transition-states in chemical-reactions,” J. Chem. Phys. 87(4), 2395–2397 (1987).
[CrossRef]

1986

D. Ducoulombier, H. Zhou, C. Boned, J. Peyrelasse, H. Saint-Guirons, and P. Xans, “Pressure (1-1000bar) and temperature (20-100oC) dependence of the viscosity of liquid hydrocarbons,” J. Phys. Chem. 90(8), 1692–1700 (1986).
[CrossRef]

1977

D. J. Mitchell, G. B. Schuster, and H. G. Drickamer, “Effect of pressure on the fluorescence of 9-carbonyl substituted anthracenes,” J. Am. Chem. Soc. 99(4), 1145–1148 (1977).
[CrossRef]

1973

S. H. Lin, “Effect of high pressure on molecular electronic spectra and electronic relaxation,” J. Chem. Phys. 59(8), 4458–4467 (1973).
[CrossRef]

1966

S. H. Lin, “Rate of interconversion of electronic and vibrational energy,” J. Chem. Phys. 44(10), 3759–3767 (1966).
[CrossRef]

1959

T. Förster, “Transfer mechanisms of electronic excitation,” Discuss. Faraday Soc. 27, 7–17 (1959).

Abel, B.

J. Assmann, R. V. Benten, A. Charvat, and B. Abel, “Vibrational energy relaxation of selectively excited aromatic molecules in solution: The effect of a methyl rotor and its chemical substitution,” J. Phys. Chem. A 107(12), 1904–1913 (2003).
[CrossRef]

Alba-Simionesco, C.

K. Niss, B. Begen, B. Frick, J. Ollivier, A. Beraud, A. Sokolov, V. N. Novikov, and C. Alba-Simionesco, “Influence of pressure on the boson peak: stronger than elastic medium transformation,” Phys. Rev. Lett. 99(5), 055502 (2007).
[CrossRef] [PubMed]

Assmann, J.

J. Assmann, R. V. Benten, A. Charvat, and B. Abel, “Vibrational energy relaxation of selectively excited aromatic molecules in solution: The effect of a methyl rotor and its chemical substitution,” J. Phys. Chem. A 107(12), 1904–1913 (2003).
[CrossRef]

Baden, N.

N. Baden, O. Kajimoto, and K. Hara, “High-pressure studies on aggregation number of surfactant micelles using the fluorescence quenching method,” J. Phys. Chem. B 106(34), 8621–8624 (2002).
[CrossRef]

Bai, S.

S. Bai and C. R. Yonker, “Pressure and temperature effects on the hydrogen-bond structures of liquid and supercritical fluid methanol,” J. Phys. Chem. A 102(45), 8641–8647 (1998).
[CrossRef]

Baker, G. L.

B. C. Hess, G. S. Kanner, Z. V. Vardeny, and G. L. Baker, “High-pressure effects on ultrafast-relaxation kinetics of excitons in polydiacetylene 4BCMU,” Phys. Rev. Lett. 66(18), 2364–2367 (1991).
[CrossRef] [PubMed]

Bakker, H. J.

S. Woutersen and H. J. Bakker, “Resonant intermolecular transfer of vibrational energy in liquid water,” Nature 402(6761), 507–509 (1999).
[CrossRef]

Begen, B.

K. Niss, B. Begen, B. Frick, J. Ollivier, A. Beraud, A. Sokolov, V. N. Novikov, and C. Alba-Simionesco, “Influence of pressure on the boson peak: stronger than elastic medium transformation,” Phys. Rev. Lett. 99(5), 055502 (2007).
[CrossRef] [PubMed]

Bell, P. M.

R. J. Hemley, P. M. Bell, and H. K. Mao, “Laser Techniques in High-Pressure Geophysics,” Science 237(4815), 605–612 (1987).
[CrossRef] [PubMed]

Benten, R. V.

J. Assmann, R. V. Benten, A. Charvat, and B. Abel, “Vibrational energy relaxation of selectively excited aromatic molecules in solution: The effect of a methyl rotor and its chemical substitution,” J. Phys. Chem. A 107(12), 1904–1913 (2003).
[CrossRef]

Beraud, A.

K. Niss, B. Begen, B. Frick, J. Ollivier, A. Beraud, A. Sokolov, V. N. Novikov, and C. Alba-Simionesco, “Influence of pressure on the boson peak: stronger than elastic medium transformation,” Phys. Rev. Lett. 99(5), 055502 (2007).
[CrossRef] [PubMed]

Boned, C.

D. Ducoulombier, H. Zhou, C. Boned, J. Peyrelasse, H. Saint-Guirons, and P. Xans, “Pressure (1-1000bar) and temperature (20-100oC) dependence of the viscosity of liquid hydrocarbons,” J. Phys. Chem. 90(8), 1692–1700 (1986).
[CrossRef]

Brown, J. M.

J. M. Brown, L. J. Slutsky, K. A. Nelson, and L. T. Cheng, “Velocity of sound and equations of state for methanol and ethanol in a diamond-anvil cell,” Science 241(4861), 65–67 (1988).
[CrossRef] [PubMed]

Chang, C. H.

S. H. Lin, C. H. Chang, K. K. Liang, R. Chang, Y. J. Shiu, J. M. Zhang, T. S. Yang, M. Hayashi, and F. C. Hsu, “Ultrafast dynamics and spectroscopy of bacterial photosynthetic reaction centers,” Adv. Chem. Phys. 121, 1–88 (2002).
[CrossRef]

Chang, H. C.

Y. Umebayashi, J. C. Jiang, Y. L. Shan, K. H. Lin, K. Fujii, S. Seki, S. I. Ishiguro, S. H. Lin, and H. C. Chang, “Structural change of ionic association in ionic liquid/water mixtures: a high-pressure infrared spectroscopic study,” J. Chem. Phys. 130(12), 124503 (2009).
[CrossRef] [PubMed]

Chang, R.

S. H. Lin, C. H. Chang, K. K. Liang, R. Chang, Y. J. Shiu, J. M. Zhang, T. S. Yang, M. Hayashi, and F. C. Hsu, “Ultrafast dynamics and spectroscopy of bacterial photosynthetic reaction centers,” Adv. Chem. Phys. 121, 1–88 (2002).
[CrossRef]

Charvat, A.

J. Assmann, R. V. Benten, A. Charvat, and B. Abel, “Vibrational energy relaxation of selectively excited aromatic molecules in solution: The effect of a methyl rotor and its chemical substitution,” J. Phys. Chem. A 107(12), 1904–1913 (2003).
[CrossRef]

Cheng, L. T.

J. M. Brown, L. J. Slutsky, K. A. Nelson, and L. T. Cheng, “Velocity of sound and equations of state for methanol and ethanol in a diamond-anvil cell,” Science 241(4861), 65–67 (1988).
[CrossRef] [PubMed]

Chudoba, C.

C. Chudoba, E. T. J. Nibbering, and T. Elsaesser, “Site-specific excited-state solute-solvent interactions probed by femtosecond vibrational spectroscopy,” Phys. Rev. Lett. 81(14), 3010–3013 (1998).
[CrossRef]

Dantus, M.

M. Dantus, M. J. Rosker, and A. H. Zewail, “Real-time femtosecond probing of transition-states in chemical-reactions,” J. Chem. Phys. 87(4), 2395–2397 (1987).
[CrossRef]

Deng, W. Q.

J. Y. Liu, W. H. Fan, K. L. Han, W. Q. Deng, D. L. Xu, and N. Q. Lou, “Ultrafast vibrational and thermal relaxation of dye molecules in solutions,” J. Phys. Chem. A 107(50), 10857–10861 (2003).
[CrossRef]

Ding, D.

B. G. Liu, M. X. Jin, H. Liu, C. Y. He, D. W. Jiang, and D. Ding, “Femtosecond time-resolved measurement of LDS698 molecular processes under high pressure,” Appl. Phys. Lett. 92(24), 241916 (2008).
[CrossRef]

Drickamer, H. G.

D. J. Mitchell, G. B. Schuster, and H. G. Drickamer, “Effect of pressure on the fluorescence of 9-carbonyl substituted anthracenes,” J. Am. Chem. Soc. 99(4), 1145–1148 (1977).
[CrossRef]

Ducoulombier, D.

D. Ducoulombier, H. Zhou, C. Boned, J. Peyrelasse, H. Saint-Guirons, and P. Xans, “Pressure (1-1000bar) and temperature (20-100oC) dependence of the viscosity of liquid hydrocarbons,” J. Phys. Chem. 90(8), 1692–1700 (1986).
[CrossRef]

Elsaesser, T.

C. Chudoba, E. T. J. Nibbering, and T. Elsaesser, “Site-specific excited-state solute-solvent interactions probed by femtosecond vibrational spectroscopy,” Phys. Rev. Lett. 81(14), 3010–3013 (1998).
[CrossRef]

Fan, W. H.

J. Y. Liu, W. H. Fan, K. L. Han, D. L. Xu, and N. Q. Lou, “Ultrafast dynamics of dye molecules in solution as a function of temperature,” J. Phys. Chem. A 107(12), 1914–1917 (2003).
[CrossRef]

J. Y. Liu, W. H. Fan, K. L. Han, W. Q. Deng, D. L. Xu, and N. Q. Lou, “Ultrafast vibrational and thermal relaxation of dye molecules in solutions,” J. Phys. Chem. A 107(50), 10857–10861 (2003).
[CrossRef]

Förster, T.

T. Förster, “Transfer mechanisms of electronic excitation,” Discuss. Faraday Soc. 27, 7–17 (1959).

Frick, B.

K. Niss, B. Begen, B. Frick, J. Ollivier, A. Beraud, A. Sokolov, V. N. Novikov, and C. Alba-Simionesco, “Influence of pressure on the boson peak: stronger than elastic medium transformation,” Phys. Rev. Lett. 99(5), 055502 (2007).
[CrossRef] [PubMed]

Friend, R. H.

J. P. Schmidtke, J. S. Kim, J. Gierschner, C. Silva, and R. H. Friend, “Optical spectroscopy of a polyfluorene copolymer at high pressure: intra- and intermolecular interactions,” Phys. Rev. Lett. 99(16), 167401 (2007).
[CrossRef] [PubMed]

Fujii, K.

Y. Umebayashi, J. C. Jiang, Y. L. Shan, K. H. Lin, K. Fujii, S. Seki, S. I. Ishiguro, S. H. Lin, and H. C. Chang, “Structural change of ionic association in ionic liquid/water mixtures: a high-pressure infrared spectroscopic study,” J. Chem. Phys. 130(12), 124503 (2009).
[CrossRef] [PubMed]

Gierschner, J.

J. P. Schmidtke, J. S. Kim, J. Gierschner, C. Silva, and R. H. Friend, “Optical spectroscopy of a polyfluorene copolymer at high pressure: intra- and intermolecular interactions,” Phys. Rev. Lett. 99(16), 167401 (2007).
[CrossRef] [PubMed]

Han, K. L.

J. Y. Liu, W. H. Fan, K. L. Han, W. Q. Deng, D. L. Xu, and N. Q. Lou, “Ultrafast vibrational and thermal relaxation of dye molecules in solutions,” J. Phys. Chem. A 107(50), 10857–10861 (2003).
[CrossRef]

J. Y. Liu, W. H. Fan, K. L. Han, D. L. Xu, and N. Q. Lou, “Ultrafast dynamics of dye molecules in solution as a function of temperature,” J. Phys. Chem. A 107(12), 1914–1917 (2003).
[CrossRef]

Hara, K.

N. Baden, O. Kajimoto, and K. Hara, “High-pressure studies on aggregation number of surfactant micelles using the fluorescence quenching method,” J. Phys. Chem. B 106(34), 8621–8624 (2002).
[CrossRef]

Hayashi, M.

S. H. Lin, C. H. Chang, K. K. Liang, R. Chang, Y. J. Shiu, J. M. Zhang, T. S. Yang, M. Hayashi, and F. C. Hsu, “Ultrafast dynamics and spectroscopy of bacterial photosynthetic reaction centers,” Adv. Chem. Phys. 121, 1–88 (2002).
[CrossRef]

He, C. Y.

B. G. Liu, M. X. Jin, H. Liu, C. Y. He, D. W. Jiang, and D. Ding, “Femtosecond time-resolved measurement of LDS698 molecular processes under high pressure,” Appl. Phys. Lett. 92(24), 241916 (2008).
[CrossRef]

He, L. M.

H. Li, B. Zhong, L. M. He, G. Q. Yang, Y. Li, S. Wu, and J. Liu, “High pressure effects on the luminescent properties and structure of coumarin 153,” Appl. Phys. Lett. 80(13), 2299–2301 (2002).
[CrossRef]

Hemley, R. J.

R. J. Hemley, P. M. Bell, and H. K. Mao, “Laser Techniques in High-Pressure Geophysics,” Science 237(4815), 605–612 (1987).
[CrossRef] [PubMed]

Hess, B. C.

B. C. Hess, G. S. Kanner, Z. V. Vardeny, and G. L. Baker, “High-pressure effects on ultrafast-relaxation kinetics of excitons in polydiacetylene 4BCMU,” Phys. Rev. Lett. 66(18), 2364–2367 (1991).
[CrossRef] [PubMed]

Hsu, F. C.

S. H. Lin, C. H. Chang, K. K. Liang, R. Chang, Y. J. Shiu, J. M. Zhang, T. S. Yang, M. Hayashi, and F. C. Hsu, “Ultrafast dynamics and spectroscopy of bacterial photosynthetic reaction centers,” Adv. Chem. Phys. 121, 1–88 (2002).
[CrossRef]

Ishiguro, S. I.

Y. Umebayashi, J. C. Jiang, Y. L. Shan, K. H. Lin, K. Fujii, S. Seki, S. I. Ishiguro, S. H. Lin, and H. C. Chang, “Structural change of ionic association in ionic liquid/water mixtures: a high-pressure infrared spectroscopic study,” J. Chem. Phys. 130(12), 124503 (2009).
[CrossRef] [PubMed]

Jiang, D. W.

B. G. Liu, M. X. Jin, H. Liu, C. Y. He, D. W. Jiang, and D. Ding, “Femtosecond time-resolved measurement of LDS698 molecular processes under high pressure,” Appl. Phys. Lett. 92(24), 241916 (2008).
[CrossRef]

Jiang, J. C.

Y. Umebayashi, J. C. Jiang, Y. L. Shan, K. H. Lin, K. Fujii, S. Seki, S. I. Ishiguro, S. H. Lin, and H. C. Chang, “Structural change of ionic association in ionic liquid/water mixtures: a high-pressure infrared spectroscopic study,” J. Chem. Phys. 130(12), 124503 (2009).
[CrossRef] [PubMed]

Jin, M. X.

B. G. Liu, M. X. Jin, H. Liu, C. Y. He, D. W. Jiang, and D. Ding, “Femtosecond time-resolved measurement of LDS698 molecular processes under high pressure,” Appl. Phys. Lett. 92(24), 241916 (2008).
[CrossRef]

Kajimoto, O.

N. Baden, O. Kajimoto, and K. Hara, “High-pressure studies on aggregation number of surfactant micelles using the fluorescence quenching method,” J. Phys. Chem. B 106(34), 8621–8624 (2002).
[CrossRef]

Kanner, G. S.

B. C. Hess, G. S. Kanner, Z. V. Vardeny, and G. L. Baker, “High-pressure effects on ultrafast-relaxation kinetics of excitons in polydiacetylene 4BCMU,” Phys. Rev. Lett. 66(18), 2364–2367 (1991).
[CrossRef] [PubMed]

Kim, J. S.

J. P. Schmidtke, J. S. Kim, J. Gierschner, C. Silva, and R. H. Friend, “Optical spectroscopy of a polyfluorene copolymer at high pressure: intra- and intermolecular interactions,” Phys. Rev. Lett. 99(16), 167401 (2007).
[CrossRef] [PubMed]

Kobayashi, T.

T. Kobayashi, M. Shiga, A. Murakami, and S. J. Nakamura, “Ab initio study of ultrafast photochemical reaction dynamics of phenol blue,” J. Am. Chem. Soc. 129(20), 6405–6424 (2007).
[CrossRef] [PubMed]

Li, H.

H. Li, B. Zhong, L. M. He, G. Q. Yang, Y. Li, S. Wu, and J. Liu, “High pressure effects on the luminescent properties and structure of coumarin 153,” Appl. Phys. Lett. 80(13), 2299–2301 (2002).
[CrossRef]

Li, Y.

H. Li, B. Zhong, L. M. He, G. Q. Yang, Y. Li, S. Wu, and J. Liu, “High pressure effects on the luminescent properties and structure of coumarin 153,” Appl. Phys. Lett. 80(13), 2299–2301 (2002).
[CrossRef]

Liang, K. K.

S. H. Lin, C. H. Chang, K. K. Liang, R. Chang, Y. J. Shiu, J. M. Zhang, T. S. Yang, M. Hayashi, and F. C. Hsu, “Ultrafast dynamics and spectroscopy of bacterial photosynthetic reaction centers,” Adv. Chem. Phys. 121, 1–88 (2002).
[CrossRef]

Lin, K. H.

Y. Umebayashi, J. C. Jiang, Y. L. Shan, K. H. Lin, K. Fujii, S. Seki, S. I. Ishiguro, S. H. Lin, and H. C. Chang, “Structural change of ionic association in ionic liquid/water mixtures: a high-pressure infrared spectroscopic study,” J. Chem. Phys. 130(12), 124503 (2009).
[CrossRef] [PubMed]

Lin, S. H.

Y. Umebayashi, J. C. Jiang, Y. L. Shan, K. H. Lin, K. Fujii, S. Seki, S. I. Ishiguro, S. H. Lin, and H. C. Chang, “Structural change of ionic association in ionic liquid/water mixtures: a high-pressure infrared spectroscopic study,” J. Chem. Phys. 130(12), 124503 (2009).
[CrossRef] [PubMed]

S. H. Lin, C. H. Chang, K. K. Liang, R. Chang, Y. J. Shiu, J. M. Zhang, T. S. Yang, M. Hayashi, and F. C. Hsu, “Ultrafast dynamics and spectroscopy of bacterial photosynthetic reaction centers,” Adv. Chem. Phys. 121, 1–88 (2002).
[CrossRef]

S. H. Lin, “Effect of high pressure on molecular electronic spectra and electronic relaxation,” J. Chem. Phys. 59(8), 4458–4467 (1973).
[CrossRef]

S. H. Lin, “Rate of interconversion of electronic and vibrational energy,” J. Chem. Phys. 44(10), 3759–3767 (1966).
[CrossRef]

Liu, B. G.

B. G. Liu, M. X. Jin, H. Liu, C. Y. He, D. W. Jiang, and D. Ding, “Femtosecond time-resolved measurement of LDS698 molecular processes under high pressure,” Appl. Phys. Lett. 92(24), 241916 (2008).
[CrossRef]

Liu, H.

B. G. Liu, M. X. Jin, H. Liu, C. Y. He, D. W. Jiang, and D. Ding, “Femtosecond time-resolved measurement of LDS698 molecular processes under high pressure,” Appl. Phys. Lett. 92(24), 241916 (2008).
[CrossRef]

Liu, J.

H. Li, B. Zhong, L. M. He, G. Q. Yang, Y. Li, S. Wu, and J. Liu, “High pressure effects on the luminescent properties and structure of coumarin 153,” Appl. Phys. Lett. 80(13), 2299–2301 (2002).
[CrossRef]

Liu, J. Y.

J. Y. Liu, W. H. Fan, K. L. Han, D. L. Xu, and N. Q. Lou, “Ultrafast dynamics of dye molecules in solution as a function of temperature,” J. Phys. Chem. A 107(12), 1914–1917 (2003).
[CrossRef]

J. Y. Liu, W. H. Fan, K. L. Han, W. Q. Deng, D. L. Xu, and N. Q. Lou, “Ultrafast vibrational and thermal relaxation of dye molecules in solutions,” J. Phys. Chem. A 107(50), 10857–10861 (2003).
[CrossRef]

Lou, N. Q.

J. Y. Liu, W. H. Fan, K. L. Han, W. Q. Deng, D. L. Xu, and N. Q. Lou, “Ultrafast vibrational and thermal relaxation of dye molecules in solutions,” J. Phys. Chem. A 107(50), 10857–10861 (2003).
[CrossRef]

J. Y. Liu, W. H. Fan, K. L. Han, D. L. Xu, and N. Q. Lou, “Ultrafast dynamics of dye molecules in solution as a function of temperature,” J. Phys. Chem. A 107(12), 1914–1917 (2003).
[CrossRef]

Mao, H. K.

R. J. Hemley, P. M. Bell, and H. K. Mao, “Laser Techniques in High-Pressure Geophysics,” Science 237(4815), 605–612 (1987).
[CrossRef] [PubMed]

Maroncelli, M.

R. M. Stratt and M. Maroncelli, “Nonreactive dynamics in solution: the emerging molecular view of solvation dynamics and vibrational relaxation,” J. Phys. Chem. 100(31), 12981–12996 (1996).
[CrossRef]

Mitchell, D. J.

D. J. Mitchell, G. B. Schuster, and H. G. Drickamer, “Effect of pressure on the fluorescence of 9-carbonyl substituted anthracenes,” J. Am. Chem. Soc. 99(4), 1145–1148 (1977).
[CrossRef]

Murakami, A.

T. Kobayashi, M. Shiga, A. Murakami, and S. J. Nakamura, “Ab initio study of ultrafast photochemical reaction dynamics of phenol blue,” J. Am. Chem. Soc. 129(20), 6405–6424 (2007).
[CrossRef] [PubMed]

Nakamura, S. J.

T. Kobayashi, M. Shiga, A. Murakami, and S. J. Nakamura, “Ab initio study of ultrafast photochemical reaction dynamics of phenol blue,” J. Am. Chem. Soc. 129(20), 6405–6424 (2007).
[CrossRef] [PubMed]

Nelson, K. A.

J. M. Brown, L. J. Slutsky, K. A. Nelson, and L. T. Cheng, “Velocity of sound and equations of state for methanol and ethanol in a diamond-anvil cell,” Science 241(4861), 65–67 (1988).
[CrossRef] [PubMed]

Nibbering, E. T. J.

C. Chudoba, E. T. J. Nibbering, and T. Elsaesser, “Site-specific excited-state solute-solvent interactions probed by femtosecond vibrational spectroscopy,” Phys. Rev. Lett. 81(14), 3010–3013 (1998).
[CrossRef]

Niss, K.

K. Niss, B. Begen, B. Frick, J. Ollivier, A. Beraud, A. Sokolov, V. N. Novikov, and C. Alba-Simionesco, “Influence of pressure on the boson peak: stronger than elastic medium transformation,” Phys. Rev. Lett. 99(5), 055502 (2007).
[CrossRef] [PubMed]

Novikov, V. N.

K. Niss, B. Begen, B. Frick, J. Ollivier, A. Beraud, A. Sokolov, V. N. Novikov, and C. Alba-Simionesco, “Influence of pressure on the boson peak: stronger than elastic medium transformation,” Phys. Rev. Lett. 99(5), 055502 (2007).
[CrossRef] [PubMed]

Ollivier, J.

K. Niss, B. Begen, B. Frick, J. Ollivier, A. Beraud, A. Sokolov, V. N. Novikov, and C. Alba-Simionesco, “Influence of pressure on the boson peak: stronger than elastic medium transformation,” Phys. Rev. Lett. 99(5), 055502 (2007).
[CrossRef] [PubMed]

Peyrelasse, J.

D. Ducoulombier, H. Zhou, C. Boned, J. Peyrelasse, H. Saint-Guirons, and P. Xans, “Pressure (1-1000bar) and temperature (20-100oC) dependence of the viscosity of liquid hydrocarbons,” J. Phys. Chem. 90(8), 1692–1700 (1986).
[CrossRef]

Rosker, M. J.

M. Dantus, M. J. Rosker, and A. H. Zewail, “Real-time femtosecond probing of transition-states in chemical-reactions,” J. Chem. Phys. 87(4), 2395–2397 (1987).
[CrossRef]

Saint-Guirons, H.

D. Ducoulombier, H. Zhou, C. Boned, J. Peyrelasse, H. Saint-Guirons, and P. Xans, “Pressure (1-1000bar) and temperature (20-100oC) dependence of the viscosity of liquid hydrocarbons,” J. Phys. Chem. 90(8), 1692–1700 (1986).
[CrossRef]

Schmidtke, J. P.

J. P. Schmidtke, J. S. Kim, J. Gierschner, C. Silva, and R. H. Friend, “Optical spectroscopy of a polyfluorene copolymer at high pressure: intra- and intermolecular interactions,” Phys. Rev. Lett. 99(16), 167401 (2007).
[CrossRef] [PubMed]

Schuster, G. B.

D. J. Mitchell, G. B. Schuster, and H. G. Drickamer, “Effect of pressure on the fluorescence of 9-carbonyl substituted anthracenes,” J. Am. Chem. Soc. 99(4), 1145–1148 (1977).
[CrossRef]

Seki, S.

Y. Umebayashi, J. C. Jiang, Y. L. Shan, K. H. Lin, K. Fujii, S. Seki, S. I. Ishiguro, S. H. Lin, and H. C. Chang, “Structural change of ionic association in ionic liquid/water mixtures: a high-pressure infrared spectroscopic study,” J. Chem. Phys. 130(12), 124503 (2009).
[CrossRef] [PubMed]

Shan, Y. L.

Y. Umebayashi, J. C. Jiang, Y. L. Shan, K. H. Lin, K. Fujii, S. Seki, S. I. Ishiguro, S. H. Lin, and H. C. Chang, “Structural change of ionic association in ionic liquid/water mixtures: a high-pressure infrared spectroscopic study,” J. Chem. Phys. 130(12), 124503 (2009).
[CrossRef] [PubMed]

Shiga, M.

T. Kobayashi, M. Shiga, A. Murakami, and S. J. Nakamura, “Ab initio study of ultrafast photochemical reaction dynamics of phenol blue,” J. Am. Chem. Soc. 129(20), 6405–6424 (2007).
[CrossRef] [PubMed]

Shiu, Y. J.

S. H. Lin, C. H. Chang, K. K. Liang, R. Chang, Y. J. Shiu, J. M. Zhang, T. S. Yang, M. Hayashi, and F. C. Hsu, “Ultrafast dynamics and spectroscopy of bacterial photosynthetic reaction centers,” Adv. Chem. Phys. 121, 1–88 (2002).
[CrossRef]

Silva, C.

J. P. Schmidtke, J. S. Kim, J. Gierschner, C. Silva, and R. H. Friend, “Optical spectroscopy of a polyfluorene copolymer at high pressure: intra- and intermolecular interactions,” Phys. Rev. Lett. 99(16), 167401 (2007).
[CrossRef] [PubMed]

Slutsky, L. J.

J. M. Brown, L. J. Slutsky, K. A. Nelson, and L. T. Cheng, “Velocity of sound and equations of state for methanol and ethanol in a diamond-anvil cell,” Science 241(4861), 65–67 (1988).
[CrossRef] [PubMed]

Sokolov, A.

K. Niss, B. Begen, B. Frick, J. Ollivier, A. Beraud, A. Sokolov, V. N. Novikov, and C. Alba-Simionesco, “Influence of pressure on the boson peak: stronger than elastic medium transformation,” Phys. Rev. Lett. 99(5), 055502 (2007).
[CrossRef] [PubMed]

Stratt, R. M.

R. M. Stratt and M. Maroncelli, “Nonreactive dynamics in solution: the emerging molecular view of solvation dynamics and vibrational relaxation,” J. Phys. Chem. 100(31), 12981–12996 (1996).
[CrossRef]

Umebayashi, Y.

Y. Umebayashi, J. C. Jiang, Y. L. Shan, K. H. Lin, K. Fujii, S. Seki, S. I. Ishiguro, S. H. Lin, and H. C. Chang, “Structural change of ionic association in ionic liquid/water mixtures: a high-pressure infrared spectroscopic study,” J. Chem. Phys. 130(12), 124503 (2009).
[CrossRef] [PubMed]

Vardeny, Z. V.

B. C. Hess, G. S. Kanner, Z. V. Vardeny, and G. L. Baker, “High-pressure effects on ultrafast-relaxation kinetics of excitons in polydiacetylene 4BCMU,” Phys. Rev. Lett. 66(18), 2364–2367 (1991).
[CrossRef] [PubMed]

Woutersen, S.

S. Woutersen and H. J. Bakker, “Resonant intermolecular transfer of vibrational energy in liquid water,” Nature 402(6761), 507–509 (1999).
[CrossRef]

Wu, S.

H. Li, B. Zhong, L. M. He, G. Q. Yang, Y. Li, S. Wu, and J. Liu, “High pressure effects on the luminescent properties and structure of coumarin 153,” Appl. Phys. Lett. 80(13), 2299–2301 (2002).
[CrossRef]

Xans, P.

D. Ducoulombier, H. Zhou, C. Boned, J. Peyrelasse, H. Saint-Guirons, and P. Xans, “Pressure (1-1000bar) and temperature (20-100oC) dependence of the viscosity of liquid hydrocarbons,” J. Phys. Chem. 90(8), 1692–1700 (1986).
[CrossRef]

Xu, D. L.

J. Y. Liu, W. H. Fan, K. L. Han, D. L. Xu, and N. Q. Lou, “Ultrafast dynamics of dye molecules in solution as a function of temperature,” J. Phys. Chem. A 107(12), 1914–1917 (2003).
[CrossRef]

J. Y. Liu, W. H. Fan, K. L. Han, W. Q. Deng, D. L. Xu, and N. Q. Lou, “Ultrafast vibrational and thermal relaxation of dye molecules in solutions,” J. Phys. Chem. A 107(50), 10857–10861 (2003).
[CrossRef]

Yang, G. Q.

H. Li, B. Zhong, L. M. He, G. Q. Yang, Y. Li, S. Wu, and J. Liu, “High pressure effects on the luminescent properties and structure of coumarin 153,” Appl. Phys. Lett. 80(13), 2299–2301 (2002).
[CrossRef]

Yang, T. S.

S. H. Lin, C. H. Chang, K. K. Liang, R. Chang, Y. J. Shiu, J. M. Zhang, T. S. Yang, M. Hayashi, and F. C. Hsu, “Ultrafast dynamics and spectroscopy of bacterial photosynthetic reaction centers,” Adv. Chem. Phys. 121, 1–88 (2002).
[CrossRef]

Yonker, C. R.

S. Bai and C. R. Yonker, “Pressure and temperature effects on the hydrogen-bond structures of liquid and supercritical fluid methanol,” J. Phys. Chem. A 102(45), 8641–8647 (1998).
[CrossRef]

Zewail, A. H.

M. Dantus, M. J. Rosker, and A. H. Zewail, “Real-time femtosecond probing of transition-states in chemical-reactions,” J. Chem. Phys. 87(4), 2395–2397 (1987).
[CrossRef]

Zhang, J. M.

S. H. Lin, C. H. Chang, K. K. Liang, R. Chang, Y. J. Shiu, J. M. Zhang, T. S. Yang, M. Hayashi, and F. C. Hsu, “Ultrafast dynamics and spectroscopy of bacterial photosynthetic reaction centers,” Adv. Chem. Phys. 121, 1–88 (2002).
[CrossRef]

Zhong, B.

H. Li, B. Zhong, L. M. He, G. Q. Yang, Y. Li, S. Wu, and J. Liu, “High pressure effects on the luminescent properties and structure of coumarin 153,” Appl. Phys. Lett. 80(13), 2299–2301 (2002).
[CrossRef]

Zhou, H.

D. Ducoulombier, H. Zhou, C. Boned, J. Peyrelasse, H. Saint-Guirons, and P. Xans, “Pressure (1-1000bar) and temperature (20-100oC) dependence of the viscosity of liquid hydrocarbons,” J. Phys. Chem. 90(8), 1692–1700 (1986).
[CrossRef]

Adv. Chem. Phys.

S. H. Lin, C. H. Chang, K. K. Liang, R. Chang, Y. J. Shiu, J. M. Zhang, T. S. Yang, M. Hayashi, and F. C. Hsu, “Ultrafast dynamics and spectroscopy of bacterial photosynthetic reaction centers,” Adv. Chem. Phys. 121, 1–88 (2002).
[CrossRef]

Appl. Phys. Lett.

B. G. Liu, M. X. Jin, H. Liu, C. Y. He, D. W. Jiang, and D. Ding, “Femtosecond time-resolved measurement of LDS698 molecular processes under high pressure,” Appl. Phys. Lett. 92(24), 241916 (2008).
[CrossRef]

H. Li, B. Zhong, L. M. He, G. Q. Yang, Y. Li, S. Wu, and J. Liu, “High pressure effects on the luminescent properties and structure of coumarin 153,” Appl. Phys. Lett. 80(13), 2299–2301 (2002).
[CrossRef]

Discuss. Faraday Soc.

T. Förster, “Transfer mechanisms of electronic excitation,” Discuss. Faraday Soc. 27, 7–17 (1959).

J. Am. Chem. Soc.

D. J. Mitchell, G. B. Schuster, and H. G. Drickamer, “Effect of pressure on the fluorescence of 9-carbonyl substituted anthracenes,” J. Am. Chem. Soc. 99(4), 1145–1148 (1977).
[CrossRef]

T. Kobayashi, M. Shiga, A. Murakami, and S. J. Nakamura, “Ab initio study of ultrafast photochemical reaction dynamics of phenol blue,” J. Am. Chem. Soc. 129(20), 6405–6424 (2007).
[CrossRef] [PubMed]

J. Chem. Phys.

S. H. Lin, “Rate of interconversion of electronic and vibrational energy,” J. Chem. Phys. 44(10), 3759–3767 (1966).
[CrossRef]

Y. Umebayashi, J. C. Jiang, Y. L. Shan, K. H. Lin, K. Fujii, S. Seki, S. I. Ishiguro, S. H. Lin, and H. C. Chang, “Structural change of ionic association in ionic liquid/water mixtures: a high-pressure infrared spectroscopic study,” J. Chem. Phys. 130(12), 124503 (2009).
[CrossRef] [PubMed]

M. Dantus, M. J. Rosker, and A. H. Zewail, “Real-time femtosecond probing of transition-states in chemical-reactions,” J. Chem. Phys. 87(4), 2395–2397 (1987).
[CrossRef]

S. H. Lin, “Effect of high pressure on molecular electronic spectra and electronic relaxation,” J. Chem. Phys. 59(8), 4458–4467 (1973).
[CrossRef]

J. Phys. Chem.

D. Ducoulombier, H. Zhou, C. Boned, J. Peyrelasse, H. Saint-Guirons, and P. Xans, “Pressure (1-1000bar) and temperature (20-100oC) dependence of the viscosity of liquid hydrocarbons,” J. Phys. Chem. 90(8), 1692–1700 (1986).
[CrossRef]

R. M. Stratt and M. Maroncelli, “Nonreactive dynamics in solution: the emerging molecular view of solvation dynamics and vibrational relaxation,” J. Phys. Chem. 100(31), 12981–12996 (1996).
[CrossRef]

J. Phys. Chem. A

J. Y. Liu, W. H. Fan, K. L. Han, D. L. Xu, and N. Q. Lou, “Ultrafast dynamics of dye molecules in solution as a function of temperature,” J. Phys. Chem. A 107(12), 1914–1917 (2003).
[CrossRef]

J. Y. Liu, W. H. Fan, K. L. Han, W. Q. Deng, D. L. Xu, and N. Q. Lou, “Ultrafast vibrational and thermal relaxation of dye molecules in solutions,” J. Phys. Chem. A 107(50), 10857–10861 (2003).
[CrossRef]

J. Assmann, R. V. Benten, A. Charvat, and B. Abel, “Vibrational energy relaxation of selectively excited aromatic molecules in solution: The effect of a methyl rotor and its chemical substitution,” J. Phys. Chem. A 107(12), 1904–1913 (2003).
[CrossRef]

S. Bai and C. R. Yonker, “Pressure and temperature effects on the hydrogen-bond structures of liquid and supercritical fluid methanol,” J. Phys. Chem. A 102(45), 8641–8647 (1998).
[CrossRef]

J. Phys. Chem. B

N. Baden, O. Kajimoto, and K. Hara, “High-pressure studies on aggregation number of surfactant micelles using the fluorescence quenching method,” J. Phys. Chem. B 106(34), 8621–8624 (2002).
[CrossRef]

Nature

S. Woutersen and H. J. Bakker, “Resonant intermolecular transfer of vibrational energy in liquid water,” Nature 402(6761), 507–509 (1999).
[CrossRef]

Phys. Rev. Lett.

C. Chudoba, E. T. J. Nibbering, and T. Elsaesser, “Site-specific excited-state solute-solvent interactions probed by femtosecond vibrational spectroscopy,” Phys. Rev. Lett. 81(14), 3010–3013 (1998).
[CrossRef]

K. Niss, B. Begen, B. Frick, J. Ollivier, A. Beraud, A. Sokolov, V. N. Novikov, and C. Alba-Simionesco, “Influence of pressure on the boson peak: stronger than elastic medium transformation,” Phys. Rev. Lett. 99(5), 055502 (2007).
[CrossRef] [PubMed]

B. C. Hess, G. S. Kanner, Z. V. Vardeny, and G. L. Baker, “High-pressure effects on ultrafast-relaxation kinetics of excitons in polydiacetylene 4BCMU,” Phys. Rev. Lett. 66(18), 2364–2367 (1991).
[CrossRef] [PubMed]

J. P. Schmidtke, J. S. Kim, J. Gierschner, C. Silva, and R. H. Friend, “Optical spectroscopy of a polyfluorene copolymer at high pressure: intra- and intermolecular interactions,” Phys. Rev. Lett. 99(16), 167401 (2007).
[CrossRef] [PubMed]

Science

R. J. Hemley, P. M. Bell, and H. K. Mao, “Laser Techniques in High-Pressure Geophysics,” Science 237(4815), 605–612 (1987).
[CrossRef] [PubMed]

J. M. Brown, L. J. Slutsky, K. A. Nelson, and L. T. Cheng, “Velocity of sound and equations of state for methanol and ethanol in a diamond-anvil cell,” Science 241(4861), 65–67 (1988).
[CrossRef] [PubMed]

Other

H. G. Drickamer, and C. W. Frank, “Electronic transitions and the high pressure chemistry and physics of solids” (Chapman-Hall, London, 1973).

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Figures (4)

Fig. 1
Fig. 1

The schematic diagram of the experimental setup. BS, beam splitter; TS, translation stage for optical delay; GP, Glan prism; L, focusing lens; F, filter for 788 nm passing through; PD, sensitive p-i-n Si photodiode; GAC, gem anvil cell.

Fig. 2
Fig. 2

An illustration for the dynamic processes involved in the observed transient absorption of LDS698 molecules. IC is the internal conversion process and VR is the vibrational relaxation process.

Fig. 3
Fig. 3

The transient absorption spectra of LDS698 in solution at different pressures. The spectrum at ambient pressure was also taken from a 1 mm quartz cell for comparison.

Fig. 4
Fig. 4

(a) Semi-logarithmic plot of the rate constants k 1 of the intramolecular IC process of LDS698 solution versus pressure. The solid line is the result by a linear fitting, showing an exponential dependence of k 1 on P with a slope of 0.24. (b) Dependence of the rate constants k 2 of the vibrational energy relaxation process on pressure. The solid line is the fitting result by using Eq. (12) after considering intermolecular H-bond interaction and the viscosity of the solution.

Equations (12)

Equations on this page are rendered with MathJax. Learn more.

α ( ω ) = 4 π 2 ω 3 c v v ' P a v | Ψ b v ' | μ | Ψ a v | 2 δ ( ω b v ' , a v ω ) ,
| Ψ b v ' | μ | Ψ a v | 2 = | Φ b b v ' | μ | Φ a a v | 2 = | Φ b | μ | Φ a | 2 | b v ' | a v | 2 = | μ b a | 2 | b v ' | a v | 2 .
| b v ' | a v | 2 = i | X b v i ' | X a v i | 2 ,
ω b v ' , a v = ω b a + i [ ( v i ' + 1 2 ) ω i ' ( v i + 1 2 ) ω i ] ,
α ( ω ) = 4 π 2 ω 3 c | μ b a | 2 v v ' P a v i | X b v i ' | X a v i | 2 δ ( ω b v ' , a v ω ) .
W a b = 2 π v v ' P a v | ψ b v ' | H ^ ' B O | ψ a v | 2 δ ( E b v ' E a v ) ,
W a b = 2 π R b a ( i ) v v ' P a v i | X b v i ' | X a v i | 2 δ ( E b v ' E a v ) ,
R b a ( i ) = ω i 2 | Φ a | 2 Q i | Φ b | 2 ,
W a b = R b a ( i ) 2 2 π ω ¯ ω a b ' exp [ S ω a b ' ω ¯ ( ln ω a b ' S ω ¯ 1 ) ] ,
W a b ( P ) W a b ( 0 ) = ω a b ' ( 0 ) ω a b ' ( P ) exp [ Δ ω a b ' P ω a b ' ( 0 ) ln ω a b ' ( 0 ) S ω ¯ ] ,
ln W a b ( P ) W a b ( 0 ) = ( Δ ω a b ' ω ¯ ln ω a b ' ( 0 ) S ω ¯ + Δ ω a b 2 ω ¯ ) P .
k 2 k ' + k ' ' = 1 / exp ( a P 2 + b P + c ) + d / ( 1 e P ) 2

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