Citation: Jun LI, Ping CHEN, Jiang ZHAO, De Shui ZHENG, Tsuneki Okasaki, Masaaki Hayami. ESR Study on the Photooxidation Mechanism of Near-Infrared Absorbing Benzothiazolone Cyanine Dye[J]. Chinese Chemical Letters, ;1997, 8(8): 711-714. shu

ESR Study on the Photooxidation Mechanism of Near-Infrared Absorbing Benzothiazolone Cyanine Dye

a Institute of Photographic Chemistry, The Chinese Academy of Sciences, Beijing 100101;
b Nippon Kankah-Shikiso Kenkyusho, Okayama 701, Japan

Received Date: 10 April 1997

Fund Project: This work was supported by NSFC.

In this paper,the direct photooxidation mechanism of near-infrared absorbing benzothiazolone cyanine dye has been studied by VIS absorption spectroscopy and Electron Spin Resonance (ESR).The technique of spin trapping has been successfully applied to the detection of the photoinduced formation of singlet oxygen (¹O₂) and superoxide (O₂^-).It was reveled that the singlet oxygen and superoxide anion all contributed to the photofading of cyanine dye.
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