微盘电极应用-聚在乙二醇离子导体中的伏安分析

在聚乙二醇离子导体中, 研究了二茂铁在其中的伏安性质, 结果表明如果电活性物质与聚合物溶剂不发生相互反应, 那么电活性物质在聚合物溶剂中的扩散仍然遵循Fick扩散方程, 其伏安结果可以定量描述。提出了在聚合物离子导体中不需要知道电活性物质的摩尔浓度就可估算扩散系数的伏安方法, 探索了在聚合物离子导体中电活性物质的扩散规律。

Application of microdisk electrode-voltammetric analysis in ionic conductive polyethylene glycol

In ionic conductive polyethylene glycol, the voltammetric properties for ferrocene oxidation at microdisc electrode are explored. Experimental results demonstrate that, if the electroactive molecules don't react with polymeric solvents, its diffusion behavior in polymeric solvents still follows Fick diffusion equation and the current-voltage curves can be described quantitatively. A simple method for evaluating the diffusion coefficient under the condition of unknown concentration of electroactive substance in ionic conductive polyethylene glycol is presented, and the effects of temperature, salt concentration in polymeric solvents as well as molecular weight of polyethylene glycol on diffusion coefficient of ferrocene have been discussed.