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《CHEMICAL RESEARCH IN CHINESE UNIVERSITIES》 1994-01
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Direct Electrochemistry of Cytochrome C at Gold Electrode Modified with Pyridine or Its Polymer

QU Xiao-Gang;ZHOU Cheng-Li;LU Tian-Hong;DONG Shao-Jun(Laboratory of Electroanalytical Chemistry,Cheangchun Institute of Applied Chemistry,Chinese Academy of Sciences,Changchun,130022)  
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.
【Fund】: 国家自然科学基金
【CateGory Index】: O614.123
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