CH_2Cl_2对离子液体BmimPF_6中二茂铁电化学行为的影响  

Effect of CH_2Cl_2 on the Redox Behavior of Ferrocene in Ionic Liquid BmimPF6

作　　者：季巍巍[1] 徐立群[1] 李冬梅[1] 王荣[1] 吴霞琴[1] 章宗穰[1] 

机构地区：[1]上海师范大学化学系,上海200234

出　　处：《电化学》2008年第4期411-414,共4页Journal of Electrochemistry

基　　金：国家自然科学基金(20503016);上海市科委启明星基金(07QA14044);湖南大学生物传感与计量学国家重点实验室开放基金资助

摘　　要：应用循环伏安和交流阻抗法研究有机溶剂二氯甲烷对二茂铁在离子液体1-丁基-3-甲基咪唑六氟磷酸盐(Bm imPF6)中电化学行为的影响.实验表明,二氯甲烷可促进离子液体的离子解离,减小离子液体粘度,增加离子液体电导率,加速二茂铁在离子液体中的扩散,增大氧化还原峰电流.由于电极界面双电层结构的变化,导致双电层电容增大,电极反应电阻减小,从而加速了界面电子传递反应.The effects of CH2Cl2 on the room temperature redox behaviors of ferrocene in ionic liquid, Bmi- mPF6, were studied by cyclic voltammetry and AC CH2Cl2, accelerated the dissociation of ionic liquid, Impedance. The results suggested that the presence of leading to lower viscosity and larger ionic conductovity, hence, the diffusions of ferrocence in BmimPF6 were enhanced and the peak currents of redox reactions were increased. The changes in the double-layer structure at the electrode interface resulted in larger capacitance, which reduced the electrode recution resistances, accordirgly, the reaction kinetics of ferrocene were enhanced.

关 键 词：离子液体 BmimPF6 双电层电容 反应速率 二茂铁 二氯甲烷 

分 类 号：O646[理学—物理化学]