有序介质中二苯甲酰甲烷的酮醇互变异构  

Keto-enol Tautomerism of Dibenzoylmethane in Organized Media

作　　者：江云宝[1] 叶浓[1] 

机构地区：[1]厦门大学化学系,厦门361005

出　　处：《化学学报》1992年第9期924-929,共6页Acta Chimica Sinica

摘　　要：用紫外光谱法研究了二苯甲酰甲烷在β-环糊精及离子型和非离子型胶束介质中的酮醇互变异构性质,β-环糊精的引入或胶束的形成使酮醇异构平衡向烯醇式方向移动.结果表明,用二苯甲酰甲烷的酮醇互变异构性质能够表征有序介质的微环境性质,确定表面活性物质的临界胶束浓度.The keto-enol tautomerism of dibenzoylmethane (DBM) in organized media, e.g. β-cyclodextrin and micelles (ionic and non-ionic), was monitored by ultraviolet absorption spectra. It was observed that the introduction of β-cyclodextrin or the formation of micelle in the DBM aqueous solution made the tautomerism equilibrium favour for enol type. The results indicated that the properties of tautomerism of DBM could be applied to characterize the microenvironment al property of organized media, reveal the structural characteristics of micelle, and determine the critical micelle concentration of surfactant.

关 键 词：Β-二酮 酮醇互变异构 有序介质 

分 类 号：O625.14[理学—有机化学]