应用化学 ›› 1992, Vol. 0 ›› Issue (2): 51-55.
• 研究论文 • 上一篇 下一篇
朱毅暋, 张文斌, 董绍俊
收稿日期:
修回日期:
出版日期:
发布日期:
基金资助:
Zhu Yimin, Zhang Wenbin, Dong Shaojun
Received:
Revised:
Published:
Online:
摘要： 用电化学聚合法制备的聚吡咯及包夹亚甲绿的聚吡咯薄膜修饰电极可以促进血红蛋白的非均相电子传递过程。用光透薄层光谱电化学技术测定了血红蛋白在包夹亚甲绿的聚吡咯修饰电极上的电子传递数(n),标准电极电位(Eo')和非均相电子传递速度常数(kεho)。对血红蛋白在聚吡咯修饰电极上的电子传递反应机理进行了探讨。
关键词: 血红蛋白, 电子传递, 聚吡咯修饰电极, 亚甲绿, 光谱电化学技术
Abstract: Polypyrrole (PPy) and polypyrrole containng Methylene Green (MG/PPy)thin-film modified electrodes prepared by electrochemical polymerization may promote heterogeneous electron transfer process of hemoglobin. Using optical thin-layer spectroelectrochemical techniques some electrochemical parameters of hemoglobin on PPy and MG/PPy modified electrode were determined as follows:the electron transfer number n=1.88,formal electrode potential Eo'=-0.081V (vs Ag/AgCl) and the heterogeneous electron transfer rate constant ks=1.75×10-5cm/S. The mechanism for the electron transfer reaction of hemoglobin at polypyrrole modified electrode includes: first,the polypeptide chains of hemoglobin were got out of shape by pyrrole, as a result, heme groups were in part exposed; second, owing to the interaction between pyrrole and heme iron, Fe(Ⅱ)was lowered into the porphyrin ring.
Key words: hemoglobin, polypyrrole modified electrode, methylene green, spectroelectrochemical technique
朱毅暋, 张文斌, 董绍俊. 聚吡咯及包夹亚甲绿的聚吡咯修饰电极对血红蛋白电极过程的促进[J]. 应用化学, 1992, 0(2): 51-55.
Zhu Yimin, Zhang Wenbin, Dong Shaojun. ELECTRODE PROCESS OF HEMOGLOBIN PORMOTED BY POLYPYRROLE AND POLYPYRROLE CONTAINING METHYLENE GREEN MODIFIED ELECTRODES[J]. Chinese Journal of Applied Chemistry, 1992, 0(2): 51-55.
0 / / 推荐
导出引用管理器 EndNote|Ris|BibTeX
链接本文: http://yyhx.ciac.jl.cn/CN/
http://yyhx.ciac.jl.cn/CN/Y1992/V0/I2/51
