高等学校化学学报

高等学校化学学报

• 研究论文 • 上一篇    下一篇

室温下甲苯中C606-和C706-的电化学检测

张美芹, 刘卉, 胡虎, 谢书宝, 静平, 李美仙, 甘良兵, 朱志伟, 寇元, 邵元华   

  1. 北京大学化学与分子工程学院,北京分子科学国家实验室, 绿色化学研究中心, 北京100871
  • 收稿日期:2006-06-13 修回日期:1900-01-01 出版日期:2007-04-10 发布日期:2007-04-10
  • 通讯作者: 邵元华

Electrochemical Detection of C606- and C706- in Toluene at Room Temperature

ZHANG Mei-Qin, LIU Hui, HU Hu, XIE Shu-Bao, JING Ping, LI Mei-Xian, GAN Liang-Bing, ZHU Zhi-Wei, KOU Yuan, SHAO Yuan-Hua*   

  1. Beijing National Laboratory for Molecular Sciences, Green Chemistry Research Center, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
  • Received:2006-06-13 Revised:1900-01-01 Online:2007-04-10 Published:2007-04-10
  • Contact: SHAO Yuan-Hua

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摘要： 采用铂微电极观察到了室温下(25±1) ℃甲苯单一溶剂中C60和C70的六步单电子电化学还原过程. 在甲苯中采用一般的有机相支持电解质溶解度差, 电势窗口也不宽. 实验结果表明, 离子液体[Tetrahexylammonium bis(trifluoromethylsulfonyl)imide, THA-Tf2N]在甲苯中具有良好的溶解度, 因而可以作为这种非极性溶剂的理想支持电解质, 并且该体系可以提供宽达–3.7 V(相对于二茂铁电对, Fe+/Fe)的电化学还原窗口, 这是在室温下实现C606-和C706-的电化学检测的主要原因.

关键词: 富勒烯, 甲苯, 离子液体, 室温, 电化学还原

Abstract: The complete set of six one-electron reductions of C60 and C70 was observed for the first time in a single organic solvent, toluene, at room temperatures (25±1) ℃ by cyclic voltammetry and differential pulse voltammetry on a Pt disk ultramicroelectrode(UME). A type of room-temperature ionic liquid(RTIL), tetrahexylammonium bis(trifluoromethylsulfonyl)imide(THA-Tf2N), was found to have an excellent solubility in toluene, and was employed as the supporting electrolyte to increase the conductivity of toluene. This electrochemical system presents a wide potential window down to -3.7 V vs. ferrocenium/ferrocene(Fe+/Fe), which essentially allows electrochemical detection of C606-and C706-at room temperature. We also discussed the reasons why does this RTIL dissolve well in toluene, and the future applications of such system.

Key words: Fullerene, Toluene, Ionic liquid, Room temperature, Electrochemical reduction

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