Chinese Journal of Applied Chemistry ›› 1992, Vol. 0 ›› Issue (2): 51-55.
• Full Papers • Previous Articles Next Articles
Zhu Yimin, Zhang Wenbin, Dong Shaojun
Received:
Revised:
Published:
Online:
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
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 / / Recommend
Add to citation manager EndNote|Ris|BibTeX
URL: http://yyhx.ciac.jl.cn/EN/
http://yyhx.ciac.jl.cn/EN/Y1992/V0/I2/51