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化学学报
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化学学报 ›› 1990, Vol. 48 ›› Issue (6): 608-611. 上一篇    下一篇

研究论文

水溶性甲磺酸二苯甲酮季铵盐光敏剂的闪光光介研究

陈文祥;Allen, N.S   

  1. 中国科学院感光化学研究所;Department of Chemistry, Faculty of Scie;Polytechnic, Britain
  • 发布日期:1990-06-15

Flash photolysis study on the initiator of water-soluble benzophenone ammonium quaternary methyl sulfonate salt

CHEN WENXIANG;Allen, N.S   

  • Published:1990-06-15

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用闪光光介研究的结果显示了水溶性甲磺酸二苯甲酮季铵盐(1)经由n-λ^*激发导致三线态, 与叔胺形成三线态激发复合物, 同时再从叔胺夺取一个电子产生自由基阴离子。经过分子间抽氢产生ketyl自由基和烷基自由基, 通过对氧、PH和胺电离势的影响的研究证实了上述机理。

关键词: 反应机理, 二苯基甲酮 P, 水溶性, 激发态, 游离基, 甲磺酸, 光敏化剂, 烃季铵化合物, 闪光光解

Flash photolysis of the water-sol. title compound, p-C6H5C(O)C6H4O(CH2)3N+(CH3)3-O3SCH3 (I) leads to the excited n-p triplet state, which abstrs. an electron from a tertiary amine via an excited triplet exciplex. The I radical anion then induces H atom abstraction to give a ketyl radical and an alkylamino radical. This mechanism is confirmed through a detailed study of the effects of O, pH, and the ionization potential of various amines used in the study.

Key words: REACTION MECHANISM, DIPHENYLMETHANONE P, WATER SOLUBILITY, EXCITED STATE, FREE RADICAL, METHANESULFONIC ACID, PHOTOSENSITIZER, METHONIUM COMPOUNDS, FLASH PHOTOLYSIS

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