ELECTROCHEMICAL STUDY OF SULFONATED FERROCENES AS REDOX MEDIATORS IN ENZYME ELECTRODES

被引：82

作者：

LIAUDET, E ^{[1
]}

BATTAGLINI, F ^{[1
]}

CALVO, EJ ^{[1
]}

机构：

[1] UNIV BUENOS AIRES,FAC CIENCIAS EXACTAS & NAT,DEPT QUIM INORGAN ANALIT & QUIM FIS,RA-1428 BUENOS AIRES,ARGENTINA

来源：

JOURNAL OF ELECTROANALYTICAL CHEMISTRY | 1990年 / 293卷 / 1-2期

关键词：

D O I：

10.1016/0022-0728(90)80052-8

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

The electrochemical oxidation of mono and disulphonic derivatives of ferrocene (dicyclopentadienyliron) to ferricinium was studied by cyclic voltammetry in aqueous solutions. Both redox systems show fast electrode kinetics on gold, platinum and carbon electrodes. As expected, the sulphonic derivatives are more oxidant than the unsubstituted ferrocene. Ferrocene sulphonates are efficient electron mediators in redox enzyme catalysis for the anaerobic oxidation of glucose catalyzed by glucose oxidase (GOD). The second order rate coefficients for the oxidation of reduced GOD (FADH2), k, are 9.5 × 104 and 9.0 ×103 1 mol-1 s-1 respectively, for mono and disulphonic derivatives at pH 4.7. Due to the increased solubility of sulphonic derivatives, the complete redox-enzymatic kinetic analysis can be made. © 1990.

引用

页码：55 / 68

页数：14

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