Effect of pH on the photosensitizing ability of eosin - an intermediate study

Zhan Gong Zhao; Hui Jun Xu; Tao Shen; De Wen Chen

doi:10.1016/1010-6030(91)80007-5

Effect of pH on the photosensitizing ability of eosin - an intermediate study

Zhan Gong Zhao
, Hui Jun Xu
, Tao Shen
, De Wen Chen

Research output: Contribution to journal › Article › peer-review

9 Scopus citations

Abstract

The effect of the pH of solutions on the photosensitizing ability of eosin was studied. It was found that, via photosensitization of eosin, benzil can be reduced by many reductants in basic solutions, while in neutral and acidic solutions it cannot be reduced though eosin itself is photoreduced to the leuco form leading to rapid fading of the solutions. Based on the semi-reduced intermediates detected by photo-induced electron spin resonance and flash photolysis, the reaction mechanism was considered in basic, neutral and acidic solutions, respectively.

Original language	English (US)
Pages (from-to)	73-80
Number of pages	8
Journal	Journal of Photochemistry and Photobiology, A: Chemistry
Volume	56
Issue number	1
DOIs	https://doi.org/10.1016/1010-6030(91)80007-5
State	Published - Feb 1 1991
Externally published	Yes

ASJC Scopus subject areas

General Chemistry
General Chemical Engineering
General Physics and Astronomy

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title = "Effect of pH on the photosensitizing ability of eosin - an intermediate study",

abstract = "The effect of the pH of solutions on the photosensitizing ability of eosin was studied. It was found that, via photosensitization of eosin, benzil can be reduced by many reductants in basic solutions, while in neutral and acidic solutions it cannot be reduced though eosin itself is photoreduced to the leuco form leading to rapid fading of the solutions. Based on the semi-reduced intermediates detected by photo-induced electron spin resonance and flash photolysis, the reaction mechanism was considered in basic, neutral and acidic solutions, respectively.",

author = "Zhao, \{Zhan Gong\} and Xu, \{Hui Jun\} and Tao Shen and Chen, \{De Wen\}",

note = "Funding Information: from the Beijing Chemical Works, China and purified by before use. BL was obtained from the Shanghai Reagent {\textquoteleft}Project supported by the National Advanced Materials Committee of China (NAMCC). *?Author to whom correspondence should be addressed.",

year = "1991",

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doi = "10.1016/1010-6030(91)80007-5",

language = "English (US)",

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T1 - Effect of pH on the photosensitizing ability of eosin - an intermediate study

AU - Zhao, Zhan Gong

AU - Xu, Hui Jun

AU - Shen, Tao

AU - Chen, De Wen

N1 - Funding Information: from the Beijing Chemical Works, China and purified by before use. BL was obtained from the Shanghai Reagent ‘Project supported by the National Advanced Materials Committee of China (NAMCC). *?Author to whom correspondence should be addressed.

PY - 1991/2/1

Y1 - 1991/2/1

N2 - The effect of the pH of solutions on the photosensitizing ability of eosin was studied. It was found that, via photosensitization of eosin, benzil can be reduced by many reductants in basic solutions, while in neutral and acidic solutions it cannot be reduced though eosin itself is photoreduced to the leuco form leading to rapid fading of the solutions. Based on the semi-reduced intermediates detected by photo-induced electron spin resonance and flash photolysis, the reaction mechanism was considered in basic, neutral and acidic solutions, respectively.

AB - The effect of the pH of solutions on the photosensitizing ability of eosin was studied. It was found that, via photosensitization of eosin, benzil can be reduced by many reductants in basic solutions, while in neutral and acidic solutions it cannot be reduced though eosin itself is photoreduced to the leuco form leading to rapid fading of the solutions. Based on the semi-reduced intermediates detected by photo-induced electron spin resonance and flash photolysis, the reaction mechanism was considered in basic, neutral and acidic solutions, respectively.

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U2 - 10.1016/1010-6030(91)80007-5

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AN - SCOPUS:0011420391

SN - 1010-6030

VL - 56

SP - 73

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JO - Journal of Photochemistry and Photobiology, A: Chemistry

JF - Journal of Photochemistry and Photobiology, A: Chemistry

IS - 1

ER -

Effect of pH on the photosensitizing ability of eosin - an intermediate study

Abstract

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