在特殊环境中硫代苯甲酸-S-苯酯光解机理的研究  

Photolysis of S-Phenyl Thiobenzoates in Various Media

作　　者：苏京京 戴光松[1] 吴世康[1] 

机构地区：[1]中国科学院感光化学研究所,北京100101

出　　处：《化学学报》1994年第12期1159-1164,共6页Acta Chimica Sinica

基　　金：国家自然科学基金资助的项目

摘　　要：本工作对两种具不同取代基的硫代苯甲酸-S-苯酯在苯溶液和硅胶薄层色谱板上的光解进行了研究,发现硫代苯甲酸-S-苯酯在苯溶液中的光解产物有苯甲醛(3)、苯硫酚(4)、二苯基硫醚(8)、二苯基二硫醚(5)、联苯(9)以及邻巯基苯甲酰基苯(6)与对巯基苯甲酸基苯(7)两个Fries光重排产物.实验结果表明,光解产物的分布受环境和介质的强烈影响.讨论了笼效应和外加磁场效应在硫代苯甲酸-S-苯酯光解中的作用,并进一步确定此类化合物的光解反应是通过其三重态而发生的.In this work, the photolysis of two S-phenyl thiobenzoates with different substitutent groups in benzene solution and on thin-layer chromatography plates (silica TLC) has been investigated. It was found that the photolytic products of S-phenyl thiobenzoate include benzaldehyde, thiophenol, diphenyldisulphide, diphenylsulphide, 1,1'-biphenyl and two photo Fries rearrangement products orthemercaptobenzoylbenzene and paramercaptobenzoylbenzene. Results indicate that the distribution of photolytic products strongly depends on the environmental medium. Cage effect and external magnetic field effect both which played and important role in the photolysis of these compounds are also discussed. It was further confirmed that the photolytic reaction of S-phenyl thiobenzoates proceeds through the triplet excited state.

关 键 词：硫代苯甲酸 苯酯 光解机理 光解反应 磁场效应 

分 类 号：O644.1[理学—物理化学]