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化学学报
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化学学报 ›› 2002, Vol. 60 ›› Issue (7): 1230-1234. 上一篇    下一篇

研究论文

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

陆同兴;涂兴华;牟建海;李干佐   

  1. 安徽师范大学物理系,芜湖(241000);山东大学,济南(250100)
  • 发布日期:2002-07-15

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

Lu Tongxing;Tu Xinghua;Mu Jianhai;Li Ganzuo   

  1. Department of Physics, Anhui Normal University,Wuhan(241000);Key Lab for Colloid & Interface Chemistry of State Education Ministry, Shandong University,Jinan(250100)
  • Published:2002-07-15

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被引次数

4 | 1

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-100 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-100胶束中是三重态机理TM极化。计算机模拟 谱图进一步证实了自由基的产生和极化机理。

关键词: 胶束, 苯甲醛, 电子自旋共振, 乙二醇, 光解, 极化, 游离基

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.

Key words: MICELLE, BENZALDEHYDE, ESR, ETHANEDIOL, PHOTOLYSIS, POLARIZATION, FREE RADICAL

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