| 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.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,1998,15(3):205-209. |
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| 作者姓名： | 田秋 陈次平 |
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| 作者单位： | 1. 中国科学院化学研究所, 北京 100080;2. 中国科学院感光化学研究所, 北京 100101 |
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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 |
| 收稿时间： | 1998-01-09 |
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,Xu Guangzhi.TIME-RESOLVED ESR STUDY ON THE PHOTOCHEMICAL PROCESS IN PHENOTHIAZINE/1,4-NAPHTHOQUINONE/ETHYLENE GLYCOL SYSTEM[J].Chinese Journal of Magnetic Resonance,1998,15(3):205-209. |
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| Authors: | Tian Qiu Chen Ciping He Guanglong Jian Huahua Xu Guangzhi |
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| Institution: | 1. Institute of Chemistry, The Chinese Academy of Sciences, Beijing 100080;2. Institute of Photographic Chemistry, The Chinese Academy of Sciences, Beijing 100101 |
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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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