TY - JOUR
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
DO - 10.1016/1010-6030(91)80007-5
M3 - Article
AN - SCOPUS:0011420391
SN - 1010-6030
VL - 56
SP - 73
EP - 80
JO - Journal of Photochemistry and Photobiology, A: Chemistry
JF - Journal of Photochemistry and Photobiology, A: Chemistry
IS - 1
ER -