Electrocatalytic oxidation of some biologically important compounds at conducting polymer electrodes modified by metal complexes |
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Authors: | Ahmed Galal |
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Institution: | (1) Department of Chemistry, Faculty of Science, University of Cairo, Giza, Egypt, EG |
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Abstract: | Conducting poly(3-methylthiophene) electrodes were electrochemically prepared. The resulting polymer films were modified
with an inorganic complex, ferrocene. The incorporation of the ferrocene/ferrocenium moiety into the polymer film resulted
in enhanced charge transfer towards the oxidation of some organic molecules of biological interest. The electrochemical response
of the complex-containing polymer electrode was compared to that of the unmodified polymer electrode and that of the substrate.
Apparent diffusion coefficients of the redox species were estimated from the cyclic voltammetric data for different biological
molecules at the ferrocene-containing polymer electrode. Infra-red spectroscopic measurements for the “as-grown” films revealed
the presence of the inorganic complex within the polymer. The modified polymer electrode showed noticeable enhancement for
the charge transfer across the film interface and can be used as an electrochemical sensor for biological compounds.
Received: 3 June 1997 / Accepted: 7 July 1997 |
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Keywords: | Electrocatalysis Conducting polymers Modified electrodes Biosensors Voltammetry |
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