The effect of calcium ions on the electrocatalytic oxidation of NADH by poly(aniline)-poly(vinylsulfonate) and poly(aniline)-poly(styrenesulfonate) modified electrodes
The effect of calcium ions on the electrocatalytic oxidation of NADH by poly(aniline)-poly(vinylsulfonate) and poly(aniline)-poly(styrenesulfonate) modified electrodes
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.
adenine-dinucleotide nadh, reduced nicotinamide coenzymes, nitro-fluorenone derivatives, poly(aniline)-coated electrodes, blue-o, kinetics, films
588-593
Toh, Chee-Seng
271ecaf6-fbed-454e-aa92-c5e645ada23c
Bartlett, Phillip N.
d99446db-a59d-4f89-96eb-f64b5d8bb075
Mano, Nicolas
319fe748-1947-4dd3-8247-c7bb318d0f64
Aussenac, Fabien
cc9cae31-ee65-4619-8483-1720e20fdf68
Kuhn, Alexander
73f46b8f-b350-4c8a-8ce5-590930408086
Dufourc, Erick J.
f723576f-17fe-4f04-b3e0-05b4863e8f7a
2003
Toh, Chee-Seng
271ecaf6-fbed-454e-aa92-c5e645ada23c
Bartlett, Phillip N.
d99446db-a59d-4f89-96eb-f64b5d8bb075
Mano, Nicolas
319fe748-1947-4dd3-8247-c7bb318d0f64
Aussenac, Fabien
cc9cae31-ee65-4619-8483-1720e20fdf68
Kuhn, Alexander
73f46b8f-b350-4c8a-8ce5-590930408086
Dufourc, Erick J.
f723576f-17fe-4f04-b3e0-05b4863e8f7a
Toh, Chee-Seng, Bartlett, Phillip N., Mano, Nicolas, Aussenac, Fabien, Kuhn, Alexander and Dufourc, Erick J.
(2003)
The effect of calcium ions on the electrocatalytic oxidation of NADH by poly(aniline)-poly(vinylsulfonate) and poly(aniline)-poly(styrenesulfonate) modified electrodes.
Physical Chemistry Chemical Physics, 5 (3), .
(doi:10.1039/b209702h).
Abstract
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.
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Published date: 2003
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Keywords:
adenine-dinucleotide nadh, reduced nicotinamide coenzymes, nitro-fluorenone derivatives, poly(aniline)-coated electrodes, blue-o, kinetics, films
Identifiers
Local EPrints ID: 20092
URI: http://eprints.soton.ac.uk/id/eprint/20092
ISSN: 1463-9076
PURE UUID: 1610588f-ee68-416e-9ba6-3d254f209c8e
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Date deposited: 23 Feb 2006
Last modified: 16 Mar 2024 02:42
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Author:
Chee-Seng Toh
Author:
Nicolas Mano
Author:
Fabien Aussenac
Author:
Alexander Kuhn
Author:
Erick J. Dufourc
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