ELECTRON-TRANSFER EVENTS IN SOLUTIONS OF CYANINE DYES

被引：38

作者：

CHEN, CP ^{[1
]}

ZHOU, BM ^{[1
]}

LI, DH ^{[1
]}

XU, GG ^{[1
]}

机构：

[1] ACAD SINICA,INST CHEM,BEIJING 100080,PEOPLES R CHINA

来源：

JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY | 1995年 / 89卷 / 01期

关键词：

ELECTRON TRANSFER; CYANINE DYES; PHOTOSENSITIZED REDUCTION; SUPEROXIDE ANION; DIMETHYL SULFOXIDE;

D O I：

10.1016/1010-6030(94)04024-V

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Photosensitized reduction of oxygen to superoxide anion by cyanine dyes in dimethyl sulphoxide containing dissolved oxygen has been investigated. The technique of spin trapping has been successfully applied to the detection of the photoinduced formation of the superoxide anion. In aqueous solution the hydroxyl radical observed after irradiation originates from primarily formed O-2(-). The superoxide anion formation is due to photoinitiated electron transfer from the cyanine dyes to dissolved oxygen. The intensities of the electron spin resonance signals of various dyes as photosensitizers of superoxide are correlated with the redox potentials of the dyes.

引用

页码：25 / 29

页数：5

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