The effect of calcium ions on the electrocatalytic oxidation of NADH by poly(aniline)-poly(vinylsulfonate) and poly(aniline)-poly(styrenesulfonate) modified electrodes

被引：14

作者：

Toh, CS

Bartlett, PN ^{[1
]}

Mano, N

Aussenac, F

Kuhn, A

Dufourc, EJ

机构：

[1] Univ Southampton, Dept Chem, Southampton SO17 1BJ, Hants, England

[2] LACReM, F-33607 Pessac, France

[3] IECB Polytech, F-33607 Pessac, France

来源：

PHYSICAL CHEMISTRY CHEMICAL PHYSICS | 2003年 / 5卷 / 03期

关键词：

D O I：

10.1039/b209702h

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Addition of Ca2+ ions increases the electrocatalytic response towards NADH at poly( aniline) poly(vinylsulfonate) and poly( aniline) poly( styrenesulfonate) modified electrodes by up to 12 and 25 times, respectively. This enhancement effect is reproducible and reversible. Measurement of the amount of charge passed through the polymer film in the presence of Ca2+ indicates a correlation between the total amount of Ca2+ incorporated within the polymer film and the magnitude of the enhancement of the electrocatalytic current for NADH oxidation at the polymer film. In addition, P-31-NMR studies show that the amount of NADH bound within the poly( aniline) film is increased significantly when Ca2+ is present. These results suggest that the enhancement of the NADH oxidation current at poly( aniline) modified electrodes caused by Ca2+ is due to an increase in the partition of NADH into the polymer film and/or an increase in the binding affinity of the polymer for NADH.

引用

页码：588 / 593

页数：6

共 25 条

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