高等学校化学学报 ›› 1989, Vol. 10 ›› Issue (1): 45.

• 研究论文 • 上一篇    下一篇

氮氧自由基研究(ⅩⅫ)--哌啶氮氧自由基与卤代甲烷的接触电荷转移络合物及其光诱导的反应

江致勤1, 吴树屏1, 张茂熹2, 刘有成2   

  1. 1. 同济大学化学系;
    2. 兰州大学化学系
  • 收稿日期:1987-09-17 出版日期:1989-01-24 发布日期:1989-01-24
  • 基金资助:

    中国科学院科学基金

Studies on Nitroxides(XXI)--Contact Charge Transfer Complexes of Piperidine Nitroxides with Halomethanes and Their Photo induced Reaction

Jiang Zhiqin1, Wu Shuping1, Zhang Maoxi2, Liu Youcheng2   

  1. 1. Department of Chemistry, Tongji University, Shanghai;
    2. Department of Chemistry, Lanzhou University, Lanzhou
  • Received:1987-09-17 Online:1989-01-24 Published:1989-01-24

摘要: 本文应用UV法研究了哌啶氮氧自由基与卤代甲烷所形成CCT络合物及其光诱导的电子转移反应。实验发现,氮氧自由基π-π*的吸收红移。

关键词: 氮氧自由基, 卤代甲烷, 电荷转移络合物, 光化学氧化还原反应

Abstract: The contact Charge transfer (CCT) complexes formed from piperidine nitroxides and halomethanes and their photo-induced electron transfer reactions were studied by UVabsorption spectrometry. It was found that the π-π* transition of the nitroxides in halomethahes showed red shift, and the values of the determined complex stability constants between nitroxides and halomethanes were very low. This was consistent with the formation of their characteristic CCT complexes. The radical 2 as an electron donor underwent a rapid photo-induced redox reaction in carbon tetrachloride leading to the formation of the corresponding piperidine hydroxylamine hydrochloride. Oxygen showed a little influence upon the reaction. The reaction mechanism caused by CCT was briefly described.

Key words: Nitroxides, Halomethanes, Charge transfer complex, Photochemical redox reaction

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