高等学校化学学报 ›› 1994, Vol. 15 ›› Issue (7): 977.

• 论文 • 上一篇    下一篇

双水杨醛缩乙二胺烷基钴(Ⅲ)配合物的电化学行为及光谱电化学表征

朱世民, 张天谊, 陈慧兰, 许国荣   

  1. 南京大学化学系, 配位化学国家重点实验室, 南京, 210008
  • 收稿日期:1993-08-21 修回日期:1993-12-05 出版日期:1994-07-24 发布日期:1994-07-24
  • 通讯作者: 朱世民,男,56岁,副教授.
  • 作者简介:朱世民,男,56岁,副教授.
  • 基金资助:

    国家自然科学基金

Electrochemical Behavior and Absorption Spectroelectro-Chemistry Characterization of RCo(Salen)

ZHU Shi-Min, ZHANG Tian-Yi, CHEN Hui-Lan, SU Guo-Rong   

  1. Department of Chemistry, Nanjing University, Nanjiing, 210008
  • Received:1993-08-21 Revised:1993-12-05 Online:1994-07-24 Published:1994-07-24

摘要: 用循环伏安法研究了双水杨醛缩乙二胺烷基钴(Ⅲ)配合物[RCo(Salen),R=CH3,C2H5,n-C4H9,i-C4H9]在热解石墨电极上的电化学行为。RCo(Salen)的电化学氧化或还原均为可逆的单电子过程;氧化时钴的价态变化为Co→Co,还原时为Co→Co→Co,并伴有Co─C键的断裂和R·自由基的产生。氧化产物和还原产物均不稳定,R影响电化学性质,随着R给电子能力的增强,氧化反应的电位和还原反应的电位均负移。光谱电化学实验的结果提供了进一步的验证。

关键词: 双水杨醛缩乙二胺烷基钴配合物, 热解石墨电极, 循环伏安法, 吸收光谱电化学

Abstract: Aseries of 4 alkyl cobalt Schiff base chelates(RCo(Salen), R=CH3, C2H5, n-C4H9, i-C4H9) have been studied by cyclic voltammetry and absorption spectroelectrochemistry, using PGEand RVEas the working electrodes, respectively.The RCo(Salen)takes one electron reversible oxidation and reduction processes.The valent variation of cobalt in chelates involved in electrode reactions and the cleavage of the Co-Cbond in both pocesses are analyzed.The effect of axial ligand Ron the electrochemical behavior was presented.The ECEelectrochemical mechanism was described.In order to get further verification, the absorptive spectroelectrochemical experiment has been done, and its result is consistent with the previous mechanism.

Key words: RCo(Salen), Pyrolytic graphite electrode, Cyclic voltainmetry, Absorption spectroelectro-chemistry

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