Eastman-AQ/四硫富瓦烯修饰碳纤维微盘电极

Study of Eastman AQ/Tetrathiafulvalene Modified Carbon Fiber Microdisk Electrodes

利用新型的阳离子聚合物膜将四硫富瓦烯修饰到电极表面上，并研究了修饰电极的电化学行为。研究了浸泡时间、扫描速度和支持电解质对修饰电极性能的影响；循环伏安法、计时电流法和交流阻抗法表明四硫富瓦烯在膜中的扩散是控制步骤。四硫富瓦烯在膜中的第一对氧化还原峰呈现可逆的、单电子反应。用循环伏安法测得了ＴＴＦ＋ＴＴＦＺＴＴＦ反应的平衡常数。

Tetrathiafulvalene (TTF) was coated onto microelectrode surface with Eastman- AQ 29D polymer film and the electrochemical behavior of the resulting modified electrodes was investigated. The effects of dipping time, scan rate and supporting electrolyte on the modified microelectrode were examined. TTF is oxidized in two consecutive, one-electron steps to TTF+ and then to TTF2+ in the film. The equilibrium constant of TTF+TTF++ 2TTF+ in the Eastman-AQ 29D film determined by cyclic voltammetry is 1. 25 X 106.