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Abstract:

The electrochemical oxidation of mono and disulphonic derivatives of ferrocene (dicyclopentadienyliron) to ferricinium was studied by cyclic voltammetry in aqueous solutions. Both redox systems show fast electrode kinetics on gold, platinum and carbon electrodes. As expected, the sulphonic derivatives are more oxidant than the unsubstituted ferrocene. Ferrocene sulphonates are efficient electron mediators in redox enzyme catalysis for the anaerobic oxidation of glucose catalyzed by glucose oxidase (GOD). The second order rate coefficients for the oxidation of reduced GOD (FADH2), k, are 9.5 × 104 and 9.0 ×103 1 mol-1 s-1 respectively, for mono and disulphonic derivatives at pH 4.7. Due to the increased solubility of sulphonic derivatives, the complete redox-enzymatic kinetic analysis can be made. © 1990.

Registro:

Documento: Artículo
Título:Electrochemical study of sulphonated ferrocenes as redox mediators in enzyme electrodes
Autor:Liaudet, E.; Battaglini, F.; Calvo, E.J.
Filiación:Departamento de Químicia Inorgánica, Analítica y Química Física, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Pabellon II, Ciudad Universitaria, 1428, Buenos AiresArgentina
Palabras clave:Biochemistry; Chemical Reactions - Redox; Electrodes, Electrochemical - Enzymes; Enzymes - Enzyme Kinetics; Electron Mediators; Enzyme Electrodes; Sulfonated Ferrocenes; Organometallics
Año:1990
Volumen:293
Número:1-2
Página de inicio:55
Página de fin:68
DOI: http://dx.doi.org/10.1016/0022-0728(90)80052-8
Título revista:Journal of Electroanalytical Chemistry
Título revista abreviado:J Electroanal Chem
ISSN:00220728
CODEN:JECHE
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00220728_v293_n1-2_p55_Liaudet

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Citas:

---------- APA ----------
Liaudet, E., Battaglini, F. & Calvo, E.J. (1990) . Electrochemical study of sulphonated ferrocenes as redox mediators in enzyme electrodes. Journal of Electroanalytical Chemistry, 293(1-2), 55-68.
http://dx.doi.org/10.1016/0022-0728(90)80052-8
---------- CHICAGO ----------
Liaudet, E., Battaglini, F., Calvo, E.J. "Electrochemical study of sulphonated ferrocenes as redox mediators in enzyme electrodes" . Journal of Electroanalytical Chemistry 293, no. 1-2 (1990) : 55-68.
http://dx.doi.org/10.1016/0022-0728(90)80052-8
---------- MLA ----------
Liaudet, E., Battaglini, F., Calvo, E.J. "Electrochemical study of sulphonated ferrocenes as redox mediators in enzyme electrodes" . Journal of Electroanalytical Chemistry, vol. 293, no. 1-2, 1990, pp. 55-68.
http://dx.doi.org/10.1016/0022-0728(90)80052-8
---------- VANCOUVER ----------
Liaudet, E., Battaglini, F., Calvo, E.J. Electrochemical study of sulphonated ferrocenes as redox mediators in enzyme electrodes. J Electroanal Chem. 1990;293(1-2):55-68.
http://dx.doi.org/10.1016/0022-0728(90)80052-8