影像科学与光化学 ›› 1990, Vol. 8 ›› Issue (2): 126-133.DOI: 10.7517/j.issn.1674-0475.1990.02.126

• 研究论文 • 上一篇    下一篇

几种醌类化合物与三乙胺电子转移反应过程的ESR研究

吴兆学1, 蒯乃功1, 黄德音1, 陈涛2   

  1. 1. 华东化工学院专用化学品研究所, 上海 200237;
    2. 华东化工学院中心分析室, 上海 200237
  • 收稿日期:1988-10-13 修回日期:1989-05-22 出版日期:1990-05-20 发布日期:1990-05-20
  • 通讯作者: 黄德音

ELECTRON SPIN RESONANCE STUDY ON THE ELECTRON TRANSFER FROM TRIETHYLAMINE TO QUINONES

WU ZHAO-XIE1, KAI NAI-GONG1, HUANG DE-YIN1, CHEN TAO2   

  1. 1. Research Institute of Speciality Chemicals, East China University of Chemical Technology, Shanghai 200237, P.R. China;
    2. Analysis and Resarch Center, East China University of Chemical Technology, Shanghai 200237, P.R. China
  • Received:1988-10-13 Revised:1989-05-22 Online:1990-05-20 Published:1990-05-20

摘要: 用ESR研究了菲醌(PQ)、四氟对寒醌(TClQ)、2,3-二氯-5,6-二氰苯醌(DDQ)和苯醌(BQ)与三乙胺、(Et3bN)的电子转移反应过程。实验结果表明,醌上取代基吸电子能力越强,越易与Et3N反应,但所形成半醌负离子自由基的稳定性,则并未有此规律,而是由自由基终止机理所决定。由实验得到了DDQ与Et3N的表变曲线。本文讨论了DDQ与Et3N反应的机理,并得其反应的微分方程,用实验拟合曲线确定速率常数。然后,对该方程求解,与实验曲线比较初步确定了该反应的历程。

关键词: 醌美化合物, 三乙胺, 电子转移, 半醌自由基

Abstract: The electron transfer from triethylamine (Et3N) to phenanthraquinone (PQ),chloranil (TC1Q),2,3-dicyano-5,6-dichloro-l,4-benzoquinone (DDQ) and benzoquinone (BQ) was studied by ESR spectroscopy.The results indicated that the stronger the electron withdrawing capacity of quinones is,the easier they react with Et3N.But the stability of semiquinone radicals is affected by the properties of the substituted groups of quinones and the mechanism of radicals termination.From the DDQ- decay curves by the experiment,we proposed a reaction mechanism was proposed for DDQ and Et3N.Comparing the solutions of the equation and the experimental data,the reaction mechanism was confirmed.

Key words: quinones, triethylamine, electron transfer, semiquinone radicals