物理化学学报 >> 2003, Vol. 19 >> Issue (10): 917-921.doi: 10.3866/PKU.WHXB20031007

研究论文 上一篇    下一篇

C60系列螺亚甲基衍生物的电化学性质

宁滨;范楼珍;郑立平;曹镛;郭志新   

  1. 北京师范大学化学系,北京 100875;华南理工大学聚合物光电材料与器件研究所,广州 510640中国科学院化学研究所,北京 100080
  • 收稿日期:2003-04-08 修回日期:2003-06-02 发布日期:2003-10-15
  • 通讯作者: 范楼珍 E-mail:lzfan@bnu.edu.cn

Electrochemical Properties of Methanofullerenes

Ning Bin;Fan Lou-Zhen;Zheng Li-Ping;Cao Yong;Guo Zhi-Xin   

  1. Department of Chemistry, Beijing Normal University, Beijing 100875; Institute of Polymer Optoelectronic Materials and Devices, South China University of Technology, Guangzhou 510640;Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080
  • Received:2003-04-08 Revised:2003-06-02 Published:2003-10-15
  • Contact: Fan Lou-Zhen E-mail:lzfan@bnu.edu.cn

摘要: 考虑到在生物、新型材料等方面的应用,采用循环伏安(CV)的方法,系统研究了11个C60螺亚甲基衍生物的电化学性质. 分析比较了螺碳原子上所连不同基团的性质及链的长度等因素对C60得电子能力的影响.结果发现,引入推电子基团,如烷基,会使C60得电子能力降低,第一个还原电位有较大的负移;引入具有拉电子性质的基团,如羧酸酯基,则会部分抵消由于C60共轭结构被破坏而引起的电位负移,结果使得电位负移值减少.增加引入基团链的长度对C60的得电子的能力影响较小.同时,对于因电化学反应所引起的异构化而使还原峰发生分裂的现象作了解释.

关键词: C60, C60螺亚甲基衍生物, 循环伏安(CV), 电化学性质, 异构化

Abstract: 11 methanofullerenes have been investigated using cyclic voltammetry(CV) systematically and comparatively. The influence of the nature of groups introduced and chain length of substituents on the electron-accepting ability of methanofullerenes was observed. It was found that introducing electron-donating groups, such as alkyls, weaken the electron- accepting ability of C60 and make its first reduction wave shifted to more negative position. Introducing electron-withdrawing groups, such as carboxylic ester groups, compensate part of negative shift of the reduction wave due to the effect of the saturation of a fullerene double bond. It was also found that increasing the chain length of substituents would not obviously change the electron-accepting ability of C60. Furthermore, the split of reduction peaks of some methanofullerenes induced by electrochemical isomerization was explained.

Key words: Fullerene, Methanofullerene, Cyclic voltammetry(CV), Electrochemical properties, Isomerization