高等学校化学学报

高等学校化学学报 ›› 1992, Vol. 13 ›› Issue (11): 1448.

• 论文 • 上一篇    下一篇

三氟甲基叔丁基氮氧自由基的超精细偶合常数与溶剂极性参数的相关性研究

赵成学, 彭以源, 曲延玲, 彭红   

  1. 华中理工大学化学系, 武汉, 430074
  • 收稿日期:1992-01-29 修回日期:1992-04-10 出版日期:1992-11-24 发布日期:1992-11-24
  • 通讯作者: 赵成学
  • 基金资助:

    国家自然科学基金

EPR Study on Correlation Between aN Values of Trifluoromethyl t-Butyl Nitroxide and Solvent Parameters ET and Z(kosower)

ZHAO Cheng-Xue, PENG Yi-Yuan, QU YAN-Ling, PENG Hong   

  1. Department of Chemistry, Huazhong University of Science and Technology, Wuhan, 430074
  • Received:1992-01-29 Revised:1992-04-10 Online:1992-11-24 Published:1992-11-24

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被引次数

1

摘要： 用EPR方法测定了三氟甲基叔丁基氮氧自由基在16种溶剂中的顺磁参数αN和αFβ值.并对αN值与溶剂的极性参数ET、z进行了线性相关分析,讨论了这类低位阻含氟自旋探针对研究溶剂化和探针本身结构的作用.

关键词: 三氟甲基叔丁基氮氧自由基, &alpha, N值, ET参数, Kosower溶剂参数Z, 溶剂效应, EPR

Abstract: Trifluoromethyl t-Butyl nitroxide generated in the electron transfer reaction between(CF3CO2)2 and t-BuNHOCOPh was subjected to EPRstudy in16 solvents with different polarities.The result shows the linear relationships as aN=(2.17×10-2 ET +11.34)×10-4 T(r=0.975)and aN=(1.20×10-2 Z+11.46)×10-4 T(r=0.976).By making use of such a fluori-nated un-bulky nitroxide as the model molecule,much information of theoretical importance about the solvation as well as the electronic structure of the nitroxide have been disclosed.

Key words: Trifluoromethyl t-butyl nitroxide, aN Values, ET Parameters, Kosower solvent parameter Z, Solvation effect, EPR

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