影像科学与光化学 ›› 1985, Vol. 3 ›› Issue (4): 43-47.DOI: 10.7517/j.issn.1674-0475.1985.04.43

• 研究论文 • 上一篇    下一篇

醇-二苯甲酮光化夺氢反应活泼自由基的ESR研究

徐广智1, 许红林1, 刘杨2, 宋心琦2   

  1. 1. 中国科学院化学研究所;
    2. 清华大学化学化工系
  • 收稿日期:1984-10-15 修回日期:1985-04-17 出版日期:1985-11-20 发布日期:1985-11-20
  • 基金资助:
    中国科学院科学基金

A STUDY OF ESR SPECTRA OF ACTIVE RADICALS FORMED IN PHOTOCHEMICAL HYDROGEN ABSTRA-CTION REACTION BETWEEN ALCOHOL AND BENZOPHENONE

XU GUANG-ZHI1, XU HONG-LIN1, LIU YANG2, SONG XIN-QI2   

  1. 1. Institute of Chemistry, Academia Sinica;
    2. Department of Chemistry and Chemical Engineering, Qinghua University
  • Received:1984-10-15 Revised:1985-04-17 Online:1985-11-20 Published:1985-11-20

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摘要： 本文用自由基捕捉剂2,3,4,6-四甲基亚硝基苯(ND)及苯亚甲基叔丁基氮氧化合物(PBN)与ESR相结合的方法研究了CnH2n+1OH(n=1,2,…8)、(CH3)2CH(CH2)nOH(n=0,1,2)、CH2=CHCH2OH及C6H5CH2OH等十三种醇与二苯甲酮的光化夺氢反应中的活泼自由基,结果表明: 1.用ND时,二苯酮分别夺取CnH2n+1OH、(CH3)2CH(CH2)nOH及RCH2OH(R=CH2=CH、C6H5)中α-C、叔-C及α-C上的氢,而捕捉到Cn-1H2n-1CHOH、(CH3)2CH(CH2)nOH及RCHOH自由基。 2.用PBN时,捕捉的自由基与ND捕获的相同。

Abstract: Active radicals formed in the photochemical hydrogen abstraction between alcohol and benzophenone have been studied with the combination of ESR spectroscopy and spin trapping technique. The results show that: 1. For n-CnH2n+1OH (n=1, 2,…8), benzophenone abstrats hydrogen from the α-C of alcohol to form n-Cn-1 H2n-1 CHOH radicals. 2. For (CH3)2CH(CH2)nOH (n=0, 1,2), benzophenone abstracts hydrogen fromtertiary carbon of alcohol to form (CH3)2C(CH2)nOH radicals. 3. For RCH2OH (R=CH2=CH, C6H5), benzophenone abstracts hydrogen from α-Cof RCH2OH to form RCHOH.

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