| 菁染料光敏化超氧自由基的产生 |
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| 引用本文： | 陈次平,陆道惠,等.菁染料光敏化超氧自由基的产生[J].波谱学杂志,1994,11(4):353-360. |
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| 作者姓名： | 陈次平 陆道惠 |
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| 作者单位： | 1. 中国科学院感光化学研究所, 北京 100101;2. 中国科学院化学研究所, 北京 100080 |
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| 摘 要： | 本文用自旋捕捉技术研究了青染料在含氧的二甲基亚用溶液中将氧光还原成超氧自由基的反应,在水溶液中光照时产生的羟基自由基来源于是初形成的O2·。超氧负离子的形成是由于电子从激发态染料转移至溶解的氧,各种染料的光致ESR信号强度与染料的氧化还原电位有关。
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| 关 键 词： | 自旋捕捉 菁染料 超氧自由基 |
| 收稿时间： | 1993-11-26 |
PHOTOSENSITIZED REDUCTION OF OXYGEN TO SUPEKOXIDE BY CYANINE DYES |
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| Chen Ciping,Zhou Benmao,Lu Dauhui,Xu Guangzhi.PHOTOSENSITIZED REDUCTION OF OXYGEN TO SUPEKOXIDE BY CYANINE DYES[J].Chinese Journal of Magnetic Resonance,1994,11(4):353-360. |
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| Authors: | Chen Ciping Zhou Benmao Lu Dauhui Xu Guangzhi |
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| Institution: | 1. Institute of Photographic Chemistry, The Chinese Academy of Sciences, Beijing 100101;2. Institute of Chemistry, The Chinese Academy of Sciences, Beijing 100080 |
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| Abstract: | Photosensitized reduction of oxygen to superoxide anion by cyanine dyes in dimethyl sulphoxide slaturatcd with oxygen has been studied by ESR. In aqueous solutions the hydroxide radical observed after irradiation originates from primarily formed O2·. The superoxide anion formation is due to photo-initiated electron transfer from the cyanine dyes to the dissolved oxygen. The intensity of ESR signals of the solutions containing various dyes used as photosensitizers is correlated with the redox potentials of dyes. |
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| Keywords: | Spin trapping Cyanine dyes Superoxide anion |
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