胶束微环境下光解苯半醌负离子基的CIDEP研究  

The CIDEP Study of Photolyzed p-Benzosemiquinone Anion-radical in Micellar Microenvironment

作　　者：陆同兴[1] 汤开元 李干佐[2] 苏红梅[2] 

机构地区：[1]安徽师范大学物理系,芜湖241000 [2]山东大学化学院胶体和界面化学开放实验室,济南250100

出　　处：《化学学报》1997年第3期215-220,共6页Acta Chimica Sinica

基　　金：国家自然科学基金;中国科学院羰基合成与选择氧化国家重点实验室资助项目

摘　　要：用高时间分辨电子自旋共振(TRESR)波谱仪,研究对苯醌(PBQ)在不同的介质中光解苯半醌自由基的化学诱导动态电子自旋极化(CIDEP).实验结果指出,在乙二醇溶液中得到苯半醌自由基(PBQH)和以碳为中心的自由基(R)(OH)_2.在乙二醇/水溶液中,得到以PBQH的六条峰为主的谱线图,然后在该体系中随着加入表面活性剂TX-100,AOT的浓度增加,苯半醌负离子基(PBQ^-)的谱线强度增加,而PBQH的谱线减弱直至消失.本文从自由基所处微环境性质出发。The CIDEP spectra of photolyzed p - benzosemiquinone radical in different media have been studied experimentally with the highly time resolved ESR spectrometer. In p - benzoquinone solution with ethylene glycol as solvent,emission lines from PBQH'and R(OH)2 were obtained. With ethylene glycol and water mixture as solvent, the spectrum mainly contained six lines from PBQH'. With the addition of some surfactants (TX - 100 and AOT) and increase of their concentration, the strength of PBQH lines decreased gradually to such an extent as to disappear at last. At the same time,lines from PBQ- appeared in the spectrum and increased gradually. On the basis of special properties of the microenvironment in which radicals lied, a polarization transference mechanism and some related physical chemical properties were discussed to explain these experimental results.

关 键 词：光解 苯半醌自由基 胶束 CIDEP TRESR 苯醌 

分 类 号：O625.461[理学—有机化学]