表面活性剂TX-100与SDBS胶束中光解苯甲醛自由基的化学诱导动态电子极化  

A CIDEP Study of Photolyzed Benzaldehyde Radicals in TX-100 and SDBS Micelles

作　　者：陆同兴[1] 涂兴华[1] 牟建海[2] 李干佐[2] 

机构地区：[1]安徽师范大学物理系,芜湖241000 [2]山东大学胶体与界面化学教育部重点实验室,济南250100

出　　处：《化学学报》2002年第7期1230-1234,共5页Acta Chimica Sinica

摘　　要：利用时间分辨ESR波谱仪 ,研究了苯甲醛在乙二醇和表面活性剂SDBS ,TX 10 0的胶束溶液中的激光光解化学诱导动态电子极化 (CIDEP)现象 .苯甲醛在激光照射下可以从体系和自身中得到氢生成α 羟基苄自由基和苯酰自由基 ,在SDBS胶束中是自由基对机理RPM极化 ,而在TX 10 0胶束中是三重态机理TM极化 .The time-resolved electron spin resonance (TRESR) spectra and chemically induced dynamic electron polarization (CIDEP) phenomena, obtained from laser flash photolysis of benzaldehyde(BA)in ethylene glycol, SDBS and TX-100 micellar solutions, were investigated. It was shown that α-hydroxybenzyl and benzoyl radicals were generated via hydrogen abstraction of the triplet state of BA from the systems and itself. The polarization spectrum lines confirmed the radical pair mechanism (RPM) in SDBS micelles as well as the triplet mechanism (TM) in TX-100 micelles. The computer simulation of the CIDEP spectra further confirmed the generation and polarization mechanisms of the radicals.

关 键 词：CIDEP 苯甲醛 反应机理 表面活性剂 TX-100 SDBS 胶束 光解 自由基 化学诱导动态电子极化 

分 类 号：O644[理学—物理化学]