细胞色素C在吡啶、聚吡啶修饰的金电极上的直接电化学

研究了细胞色素C在吡啶修饰的金电极上的电化学反应,结果表明,只具有一个功能团的吡啶分子和它的聚合物对细胞色素C电化学反应也有促进作用,讨论了影响促进剂促进作用的主要因素。

Direct Electrochemistry of Cytochrome C at Gold Electrode Modified with Pyridine or Its Polymer

In this paper,the direct electrochemistry of cytochrome C at gold electrode modified with pyridine and its polymer(poly-pyridine) was studied.It was found that cytochrome C could undergo a rapid electron transfer reaction at pyridine-modified gold electrode.The promotion effect of pyridine was related to the adsorption time.With increasing the adsorption time,the separation between the cathodic and anodic peak potentials in the cyclic voltammogram of cytochrome C became smaller and smaller.When the electrode was dipped into pyridine solution for 12 h,the separation got upmost.This result demonstrates that pyridine is also a good promoter for the direct electrochemical reaction of cytochrome C although it has only one functional group.Its polymer,poly-pyridine was also investigated in the experiment.The poly-pyridine modified gold electrode was prepared with electrochemical polymerization method.According to our electrochemical results,the promotion effect of poly-pyridine was much better than that of pyridine,indicating that a major requirement for an effective promoter was that it should be strongly adsorbed on the surface of the gold electrode.