Electrochemical reactions of cyanocobalamin in acidic media

被引：13

作者：

Zheng, DH ^{[1
]}

Lu, TH ^{[1
]}

机构：

[1] ACAD SINICA, CHANGCHUN INST APPL CHEM, CHANGCHUN 130022, PEOPLES R CHINA

来源：

JOURNAL OF ELECTROANALYTICAL CHEMISTRY | 1997年 / 429卷 / 1-2期

关键词：

cyanocobalamin; cyclic voltammetry; differential pulse polarography;

D O I：

10.1016/S0022-0728(96)05021-8

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Electrochemical reactions of cyanocobalamin, CN-Cbl[Co(III)], were studied at glassy carbon electrodes in acidic media by means of cyclic voltammetry and differential pulse polarography. It was found that in pH 0 solution, CN-Cbl[Co(III)] exists mainly in the base-off form, {CN-Cbl[Co(III)]}(base-off). It can undergo a one-electron reduction and a follow-up chemical reaction to form {H2O-Cbl[Co(II)]}(base-off). The rate-constant k of the follow-up decyanation reaction is 0.022 s(-1). {H2O-Cbl[Co(II)]}(base-off) is further reduced to obtain H2O-Cbl[Co(I)]. (C) 1997 Elsevier Science S.A.

引用

页码：61 / 65

页数：5

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