香豆素酮类化合物的瞬态研究——Ⅱ.不同单体和胺类化合物对香豆素酮三重态的猝灭  

A TRANSIENT STUDY ON THE KETOCOUMARIN DERIVATIVES Ⅱ. THE TRIPLET QUENCHING OF KETOCOUMARIN BY DIFFERENT MONOMERS AND AMINES

作　　者：吴世康[1] 张建科[1] J.P.Fouassier D.Burr 

机构地区：[1]中国科学院感光化学研究所,北京100012 [2]阿尔萨斯大学牟罗兹化学学校普通光化学实验室

出　　处：《感光科学与光化学》1989年第2期47-54,共8页Photographic Science and Photochemistry

基　　金：国家自然科学基金

摘　　要：本工作采用激光闪光光解方法对香豆素酮类化合物的光还原及其三重态的猝灭问题进行了研究。当以胺类化合物为猝灭剂时,可以清楚地观察到半片呐醇自由基的生成,并得到了它的瞬态吸收光谱。以几种烯类单体去猝灭香豆素酮的三重态,所得的猝灭速度常数表明:单体的猝灭能力不能和胺类的猝灭能力相竞争,因此,可以预期这类化合物可以引发聚合某些不能为二苯酮引发体系所聚合的单体。In this work, the photoreduction and the triplet quenching of ketocoumarin derivatives have been studied by laser flash photolysis method. When the amine was used as a triplet quencher, the ketyl radical of ketocoumarin can be observed evidently. Meanwhile, the transient absorption spectrum of ketyl radical has been recorded. Several kinds of olefinic monomers were also used as triplet quenchers. The quenching constants indicate that the quenching ability of monomers cannot be competed with that of amines. Therefore, it can be expected that ketocoumarin derivatives can photoinitiate polymerization of several kind of monomers which cannot be initiated by benzophenone.

关 键 词：香豆素酮 衍生物 单体 胺 瞬态 

分 类 号：O626.31[理学—有机化学]