Electrochemical Oxidation and Reduction of Flavin–Adenine Dinucleotide Adsorbed on a Mercury Electrode Surface

The acceleration effect of p-toluidine on the electroreduction of Zn(II) on the mercury electrode surface in binary mixtures water-methanol and water-dimethylformamide is discussed. The obtained apparent and true forward rate constants of Zn(II) reduction indicate that the rate constant of the first electron transfer increases in the presence of p-toluidine. The acceleration effect may probably be accounted for by the concept of the formation on the mercury electrode an activated complex, presumably composed of p-toluidine and solvent molecules.

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Electrochemical study of the mechanism and kinetics of reductive glycoside elimination of adriamycin adsorbed on a mercury electrode surface

Journal of Electroanalytical Chemistry ◽

10.1016/0022-0728(87)80013-x ◽

1987 ◽

Vol 225 (1-2) ◽

pp. 187-204 ◽

Cited By ~ 7

Author(s):

Kenji Kano ◽

Tomonori Konse ◽

Keiko Hasegawa ◽

Bunji Uno ◽

Tanekazu Kubota

Keyword(s):

Electrode Surface ◽

Mercury Electrode ◽

Electrochemical Study ◽

Mechanism And Kinetics ◽

Kinetics Of

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Studies on the surface orientation of uracil, uridine, thymine and thymidine at the mercury electrode surface by electrocapillary measurements

Bioelectrochemistry and Bioenergetics ◽

10.1016/0302-4598(91)87026-d ◽

1991 ◽

Vol 25 (1) ◽

pp. 137-144 ◽

Cited By ~ 8

Author(s):

M.M. Kamal ◽

Z.A. Ahmed ◽

M.E. Ahmed ◽

M.S. Ibrahim ◽

Y.M. Temerk

Keyword(s):

Electrode Surface ◽

Mercury Electrode ◽

Surface Orientation

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The electrochemical behavior of flavin adenine dinucleotide in neutral solutions

Canadian Journal of Chemistry ◽

10.1139/v88-013 ◽

1988 ◽

Vol 66 (1) ◽

pp. 86-96 ◽

Cited By ~ 41

Author(s):

V. I. Birss ◽

H. Elzanowska ◽

R. A. Turner

Keyword(s):

Electrochemical Behavior ◽

Electrode Surface ◽

Flavin Adenine Dinucleotide ◽

Cyclic Voltammetric ◽

Kinetics Of Oxidation ◽

Glassy Carbon Electrodes ◽

Peak Separation ◽

Standard Rate ◽

Kinetics Of ◽

Standard Rate Constant

A detailed investigation of the electrochemical behavior of flavin adenine dinucleotide (FAD) in neutral solutions has been carried out at Hg and glassy carbon electrodes. At FAD concentrations of about 10−4 M, cyclic voltammetry (CV) shows a pair of anodic and cathodic peaks having a peak separation at low sweep rates indicative of a two-electron transfer process and yielding a formal redox potential for FAD of −0.206 ± 0.003 V vs. NHE at pH 7. Evidence for FAD adsorption was obtained in experiments at high sweep rates, from the effect of time of exposure of the electrode surface to FAD in solution and from the effect of the potential limits on the cyclic voltammetric response. The process of FAD adsorption was studied in detail in dilute FAD solutions (ca 10−6 M) using a hanging mercury drop electrode and the techniques of CV and ac voltammetry. Three distinct stages of FAD adsorption were observed and a model of the orientation of FAD on the electrode surface as a function of time and potential is presented. In addition, the kinetics of oxidation and reduction of adsorbed FAD was studied for each of the stages of FAD deposition, and a surface standard rate constant of ca. 40 s−1 was obtained for Stages II and III of FAD adsorption.

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