| 氧化锌分散体光反应产生的自由基中间体 |
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| 引用本文： | 陈次平,任新民,陆道惠,张永康.氧化锌分散体光反应产生的自由基中间体[J].影像科学与光化学,1991,9(2):137-140. |
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| 作者姓名： | 陈次平 任新民 陆道惠 张永康 |
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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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| 基金项目： | 北京分子动态及稳态结构化学国家实验室资助课题 |
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| 摘 要： | 溶液中光诱导的电子转移反应已进行了大量的研究。而半导体粉末在水相或非水溶剂中的光化学研究也与自俱增1-3]。这种光化学与成像体系、太阳能转换以及光催化或污物的光降解有关。因此,越来越引起人们的重视。
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| 关 键 词： | 氧化锌 光反应 羟烷基自由基 自旋捕捉技术 |
| 收稿时间： | 1989-06-15 |
FREE RADICAL INTERMEDIATES FORMED UPON PHOTOREACTION OF ZnO DISPERSION |
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| CHEN CI-PING,REN XIN-MIN,Lu DAO-HUI,ZHANG YONG-KANG.FREE RADICAL INTERMEDIATES FORMED UPON PHOTOREACTION OF ZnO DISPERSION[J].Imaging Science and Photochemistry,1991,9(2):137-140. |
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| Authors: | CHEN CI-PING REN XIN-MIN Lu DAO-HUI ZHANG YONG-KANG |
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| Affiliation: | 1. Institute of Photographic Chemistry, Academia Siaica, Beijing 100101, P. R. China;2. Institute of Chemistry, Academia Sinica, Beijing 100080, P. R. China |
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| Abstract: | The combination of ESR spectroscopy and spin trapping technique was used to detect free radical intermediates formed upon irradiation of ZnO powders dispersed in a mixture of water and alcohol (methanol, ethanol, 1-propanol, 2-propanol, 1-butanol, and 2-butanol) The ESR signals for the 5,5-dimethyl-l-pyrroline-N-oxide (DMPO) adducts were observed. Hydro-xyalkyl adducts were identified Experiments performed with ZnO aqueous dispersions containing various amounts of alcohol suggest that alcohol should be very sensitive toward oxidation by the photogenerated holes. Hydroxyl radical formation seems to be the first step in the pho-tooxidation process of water. Alcohols can be oxidized by the radical, leading to the formation of hydroxyalkyl radicals. |
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| Keywords: | zinc oxide photoreaction hydroxyalkyl radical spin trapping |
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