| 有机锡化合物光解活泼自由基的ESR研究 |
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| 引用本文： | 王秀华,刘扬,徐广智,梁任又. 有机锡化合物光解活泼自由基的ESR研究[J]. 感光科学与光化学, 1989, 0(3) |
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| 作者姓名： | 王秀华 刘扬 徐广智 梁任又 |
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| 作者单位： | 中国科学院化学研究所，中国科学院化学研究所，中国科学院化学研究所，中国科学技术大学结构成分分析中心 北京 100080，北京 100080，北京 100080，合肥 |
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| 摘 要： | 本文用自旋捕捉技术与ESR相结合的方法,研究了六种有机锡化合物的光解反应历程。结果表明:有机锡化合物紫外光照时,碳—锡键发生均裂,产生碳中心和锡中心自由基。其中碳中心自由基易被捕捉剂α-苯基-N-特丁基氮氧化物(PBN)或2,3,5,6-四甲基亚硝基苯(ND)所捕获;而锡中心自由基可与菲醌形成稳定的环状加合物。由于环状加合物中配体的不同,产生的空间效应也不同,从而导致加合物中的未偶电子云密度发生变化,给出相异的ESR信号。
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| 关 键 词： | 有机锡 光解 活泼自由基 电子顺磁共振 自旋捕捉 |
ESR STUDY ON THE ACTIVE FREE RADICALS FORMED DURING THE PHOTOLYSIS OF ORGANO-STANNUM COMPOUNDS |
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| WANG XIU-HUA Liu YANG Xu GUANG-ZHI. ESR STUDY ON THE ACTIVE FREE RADICALS FORMED DURING THE PHOTOLYSIS OF ORGANO-STANNUM COMPOUNDS[J]. Photographic Science and Photochemistry, 1989, 0(3) |
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| Authors: | WANG XIU-HUA Liu YANG Xu GUANG-ZHI |
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| Abstract: | Active free radicals produced during the photolysis of organo-stannum compounds have been studied by the combination of spin trapping technique and ESR spectroscopy. The results show that during the UV irradiation the C-Sn bond of organo-stannum compounds is cleaved and both C-centre and Sn-centre radicals are produced, of which the C-centre radical can be trapped by PBN or ND and a stable cyclic adduct is formed from Sn-centre radical and phenanthrenequinone. It is also interesting to note that owing to the different coordinate of cyclic adduct and the difference of steric effect, the ESR signal is quite different and the spin density on the adduct is changed. |
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| Keywords: | photolysis radicals ESR spin trapping organo-stannum compounds |
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