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Abstract:

Electrochemical fluorescence modulation of flavin redox centers covalently attached to a poly(allylamine)-hydrogel modified ITO electrode was achieved by faradaic modulation of redox states. At least a fraction of the fluorescent flavins is electroactive. Redox switching between oxidised flavin and non-fluorescent reduced leucoflavin was monitored by square wave modulated and linear scan voltfluorometry. Differential cyclic voltfluorograms and cyclic voltammograms are in very good agreement. In situ fluorescence spectroscopy can be applied to complement electrochemical studies of redox-dyes incorporated in polymeric matrices attached to the electrode surface. Advantages of electrochemical modulated fluorescence in these systems are enhanced sensitivity and selectivity in bio-sensors and the ability to obtain an insight into dynamic electron transfer processes.

Registro:

Documento: Artículo
Título:Electrochemical fluorescence modulation at a redox hydrogel modified electrode
Autor:Bonazzola, C.; Brust, M.; Calvo, E.J.
Filiación:INQUIMAE-Fac. de Cie. Exact. y Nat., Universidad de Buenos Aires, Ciudad Universitaria, AR-1428 Buenos Aires, Argentina
Palabras clave:Flavin-modified electrodes; Fluorescence spectroscopy; Biosensors; Cyclic voltammetry; Fluorescence; Hydrogels; Redox reactions; Spectroscopic analysis; Differential cyclic voltfluorograms; Electrochemical fluorescence modulation; Flavin modified electrodes; Fluorescence spectroscopy; Redox hydrogel modified electrodes; Electrochemical electrodes
Año:1996
Volumen:407
Número:1-2
Página de inicio:203
Página de fin:207
DOI: http://dx.doi.org/10.1016/0022-0728(95)04506-6
Título revista:Journal of Electroanalytical Chemistry
Título revista abreviado:J Electroanal Chem
ISSN:15726657
CODEN:JECHE
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_15726657_v407_n1-2_p203_Bonazzola

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Citas:

---------- APA ----------
Bonazzola, C., Brust, M. & Calvo, E.J. (1996) . Electrochemical fluorescence modulation at a redox hydrogel modified electrode. Journal of Electroanalytical Chemistry, 407(1-2), 203-207.
http://dx.doi.org/10.1016/0022-0728(95)04506-6
---------- CHICAGO ----------
Bonazzola, C., Brust, M., Calvo, E.J. "Electrochemical fluorescence modulation at a redox hydrogel modified electrode" . Journal of Electroanalytical Chemistry 407, no. 1-2 (1996) : 203-207.
http://dx.doi.org/10.1016/0022-0728(95)04506-6
---------- MLA ----------
Bonazzola, C., Brust, M., Calvo, E.J. "Electrochemical fluorescence modulation at a redox hydrogel modified electrode" . Journal of Electroanalytical Chemistry, vol. 407, no. 1-2, 1996, pp. 203-207.
http://dx.doi.org/10.1016/0022-0728(95)04506-6
---------- VANCOUVER ----------
Bonazzola, C., Brust, M., Calvo, E.J. Electrochemical fluorescence modulation at a redox hydrogel modified electrode. J Electroanal Chem. 1996;407(1-2):203-207.
http://dx.doi.org/10.1016/0022-0728(95)04506-6