室温下甲苯中C_(60)^(6-)和C_(70)^(6-)的电化学检测  

Electrochemical Detection of C_(60)^(6-) and C_(70)^(6-) in Toluene at Room Temperature

作　　者：张美芹[1] 刘卉[1] 胡虎[1] 谢书宝[1] 静平[1] 李美仙[1] 甘良兵[1] 朱志伟[1] 寇元[1] 邵元华[1] 

机构地区：[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

出　　处：《高等学校化学学报》2007年第4期727-730,共4页Chemical Journal of Chinese Universities

基　　金：国家自然科学基金(批准号:20475003;20235010和20420130137);北京大学985子项目;国家重大基础研究项目(批准号:TG2000048002)资助.

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[Tetrahexylam-monium 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3/3.7V(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C660-和C760-的电化学检测的主要原因.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 uhramicroelectrode （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 C60^6- and C70^6- at room temperature. We also discussed the reasons why does this RTIL dissolve well in toluene, and the future applications of such system.

关 键 词：富勒烯 甲苯 离子液体 室温 电化学还原 

分 类 号：O646[理学—物理化学]