| 吩噻嗪-1,4萘醌-乙二醇体系光化学过程的时间分辨ESR研究 |
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| 引用本文： | 田秋,陈次平,何光龙,简华华,徐广智. 吩噻嗪-1,4萘醌-乙二醇体系光化学过程的时间分辨ESR研究[J]. 波谱学杂志, 1998, 0(3) |
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| 作者姓名： | 田秋 陈次平 何光龙 简华华 徐广智 |
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| 作者单位： | 中国科学院化学研究所，中国科学院感光化学研究所 |
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| 摘 要： | 用时间分辨ＥＳＲ方法研究了吩噻嗪（ＰＴＨ）－１，４－萘醌（ＮＱ）－乙二醇（ＲＨ）体系中的光化学过程．只观察到萘醌的中性半醌自由基ＮＱＨ．＊的全发射极化的ＣＩＤＥＰ（化学诱导动态极化）信号，并未观察到极化的萘醌负离子ＮＱ－·＊的ＣＩＤＥＰ信号，表明ＲＨ与三重态ＮＱ间的质子转移反应远比ＰＴＨ与ＮＱ间的电子转移反应为快．ＮＱＨ．＊的ＣＩＤＥＰ信号随ｐＨ值的变化表明体系中同时有极化自由基ＮＱＨ．＊与ＮＱＨ．＋＊２存在，并且其间有质子交换．
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| 关 键 词： | 质子转移，自由基，CIDEP |
TIME RESOLVED ESR STUDY ON THE PHOTOCHEMICAL PROCESS IN PHENOTHIAZINE/1,4 NAPHTHOQUINONE/ETHYLENE GLYCOL SYSTEM |
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| Tian Qiu ,Chen Ciping ,He Guanglong ,Jian Huahua and Xu Guangzhi. TIME RESOLVED ESR STUDY ON THE PHOTOCHEMICAL PROCESS IN PHENOTHIAZINE/1,4 NAPHTHOQUINONE/ETHYLENE GLYCOL SYSTEM[J]. Chinese Journal of Magnetic Resonance, 1998, 0(3) |
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| Authors: | Tian Qiu Chen Ciping He Guanglong Jian Huahua Xu Guangzhi |
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| Affiliation: | Tian Qiu 1,Chen Ciping 2,He Guanglong 1,Jian Huahua 1 and Xu Guangzhi 1 |
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| Abstract: | The photoinduced hydrogen transfering reaction in phenothiazine/1,4 naphthoquinone/ethylene glycol system has been investigated by time resolved electron spin resonance technique. From the measured emission CIDEP signals of neutral 1,4 naphtho semiqinone radical NQH .* , it is concluded that the rate of hydrogen transfering reaction between ethylene glycol and 1,4 naphthoquinone is much faster than the rate of electron transfering reaction between phenothiazine and 1,4 naphthoquinone. The broadened CIDEP spectra obtained in acidic solution of 1,4 naphthoquinone/ethylene glycol systems indicate that a fast proton exchange process must exist between the spin polarized radicals NQH .* and NQH .+* 2. |
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| Keywords: | TRESR CIDEP Proton transfer |
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