Abstract

To achieve detection, monitoring, and automation of starch graft copolymerzation at any time, the investigation is being made according to luminescence of free radicals produced in the reaction. The investigations on the fluorescence spectra of starch-water suspension excited by ultraviolet (UV) light and its characteristics contribute to study the characteristics and mechanisms of free radicals coming into being, emitting, and disappearing. Fluorescence spectra of starch, dextrose, sucrose, and maltose excited by 260-nm light are compared and their similarities further verify that this fluorescence comes from the transition from nonbonding, namely n electrons in the hetero-atom (O) of the functional group (C-O-C) called ether linkage, to the antibonding orbital 'sigma'*. The functional group is a part of six-membered ring structure in starch molecule. Meanwhile, the experimental results indicate that relative peak intensity of fluorescence emitted by 1% starch suspension comes to climax when starch suspensions with different concentrations are excited by the same wavelength.

© 2005 Chinese Optics Letters

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  2. Y. J. Wang and Z. F. Song, Spectroscopic Analysis and Chromatogram Analyssi (Peking University Press, Beijing, 1995).
  3. F. Yang and W. J. Zheng, Guangzhou Chemical Industry and Technology (in Chinese) 32, (3) 1 (2003).
  4. Q. Huang, F. X. Luo, and L. S. Yang, Polymeric Materials Science and Engineering (in Chinese) 20, (5) 19 (2004).
  5. J. Z. Ma, J. M. Zheng, Z. S. Yang, X. L. Zhang, and Q. Q. Lv, Leather Science and Engineering (in Chinese) 8, (2) 22 (1998).
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  15. D. J. Guo and H. F. Sun, Spectrophotometric Method (Chongqing University Press, Chongqing, 1994).

2004

Q. Huang, F. X. Luo, and L. S. Yang, Polymeric Materials Science and Engineering (in Chinese) 20, (5) 19 (2004).

2003

X. Lan, Y. Liu, S. M. Gao, Z. Shen, J. Lu, and X. Ni, Laser Technology (in Chinese) 27, 477 (2003).

F. Yang and W. J. Zheng, Guangzhou Chemical Industry and Technology (in Chinese) 32, (3) 1 (2003).

2002

Q. L. Wang and G. X. Lv, Analysis and Testing Technology and Instruments 8, 213 (2002).

Z. B. Gu, J. Chin. Cereals and Oils association (in Chinese) 17, (2) 1 (2002).

2001

S. L. Wei and G. H. Deng, Chin. J. Anal. Chem. 29, 425 (2001).

C. F. Wang, S. Xiong, and Y. Xiang, Chin. J. Anal. Laboratory (in Chinese) 20, (1) (2001).

2000

G. M. Chang, L. J. Zhao, and S. A. Shang, Journal of Shanxi Agricultural Sciences (in Chinese) 28, (3) 35 (2000).

1999

F. Y. Wu, J. F. Huang, Z. Q. Ji, and X. Wen, Chin. J. Anal. Laboratory (in Chinese) 18, (2) (1999).

1998

J. Z. Ma, J. M. Zheng, Z. S. Yang, X. L. Zhang, and Q. Q. Lv, Leather Science and Engineering (in Chinese) 8, (2) 22 (1998).

F. Y. Wu, J. F. Huang, and Z. Q. Ji, Chin. J. Anal. Laboratory (in Chinese) 17, (6) (1998).

Analysis and Testing Technology and Instruments

Q. L. Wang and G. X. Lv, Analysis and Testing Technology and Instruments 8, 213 (2002).

Chin. J. Anal. Chem.

S. L. Wei and G. H. Deng, Chin. J. Anal. Chem. 29, 425 (2001).

Chin. J. Anal. Laboratory (in Chinese)

C. F. Wang, S. Xiong, and Y. Xiang, Chin. J. Anal. Laboratory (in Chinese) 20, (1) (2001).

F. Y. Wu, J. F. Huang, and Z. Q. Ji, Chin. J. Anal. Laboratory (in Chinese) 17, (6) (1998).

F. Y. Wu, J. F. Huang, Z. Q. Ji, and X. Wen, Chin. J. Anal. Laboratory (in Chinese) 18, (2) (1999).

Guangzhou Chemical Industry and Technology (in Chinese)

F. Yang and W. J. Zheng, Guangzhou Chemical Industry and Technology (in Chinese) 32, (3) 1 (2003).

J. Chin. Cereals and Oils association (in Chinese)

Z. B. Gu, J. Chin. Cereals and Oils association (in Chinese) 17, (2) 1 (2002).

Journal of Shanxi Agricultural Sciences (in Chinese)

G. M. Chang, L. J. Zhao, and S. A. Shang, Journal of Shanxi Agricultural Sciences (in Chinese) 28, (3) 35 (2000).

Laser Technology (in Chinese)

X. Lan, Y. Liu, S. M. Gao, Z. Shen, J. Lu, and X. Ni, Laser Technology (in Chinese) 27, 477 (2003).

Leather Science and Engineering (in Chinese)

J. Z. Ma, J. M. Zheng, Z. S. Yang, X. L. Zhang, and Q. Q. Lv, Leather Science and Engineering (in Chinese) 8, (2) 22 (1998).

Polymeric Materials Science and Engineering (in Chinese)

Q. Huang, F. X. Luo, and L. S. Yang, Polymeric Materials Science and Engineering (in Chinese) 20, (5) 19 (2004).

Other

Y. J. Wang and Z. F. Song, Spectroscopic Analysis and Chromatogram Analyssi (Peking University Press, Beijing, 1995).

D. N. Yao and G. T. Liu, Cereal and Feed Industry (2) 36 (1997).

H. B. Gao, Foundation of Organic Chemistry (Tianjin University Press, Tianjin, 1995).

D. J. Guo and H. F. Sun, Spectrophotometric Method (Chongqing University Press, Chongqing, 1994).

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