Electrochemical oxidation of some tetrahydropteridine derivatives at the platinum electrode |
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| Authors: | J. Pradáč J. Pradáčová D. Homolka J. Koryta J. Weber K. Slavík R. Čiharř |
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| Affiliation: | Institute of Biophysics, Charles University, Salmouská 3, Prague 2 (Czecholsovakia);The Heyrovský Institute of Physical Chemistry and Electrochemistry, Czechoslovak Academy of Siiences Opletalova 25, Prague 1 (Czechoslovakia);Scientific Laboratory for Research of Protein Metabolism and Proteolysis of the Faculty of General Medicine, Charles University, U nemocnice 5, Prague 2 (Czechoslovakia) |
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| Abstract: | 6 and 7-substituted 2-amino-4-hydroxy-5,6,7,8-tetrahydropteridines are oxidized at a platinum electrode in several waves in the potential range between hydrogen and oxygen evolution potentials. The electrode process in the first (main) anodic wave was investigated in more detail using a stationary and rotating disc platinum electrode. The process in this wave is “semireversible” with an exchange of two electrons. The standard rate constants of this reaction were determined. The oxidation product is deactivated by an irreversible chemical reaction. Some of the products block the surface of the electrode. |
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