An electrochemical impedance and spectroelectrochemical study of the polypyrrole-flavin composite electrode
Electrodes modified with polypyrrole-flavin mononucleotide composite film (PPy-FMN) have been studied by cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS) and UV-visible spectro-electrochemistry with optically transparent electrodes (OTE). Flavin molecules, electrostatically trap...
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todo:paper_15726657_v449_n1-2_p111_Bonazzola2023-10-03T16:27:26Z An electrochemical impedance and spectroelectrochemical study of the polypyrrole-flavin composite electrode Bonazzola, C. Calvo, E.J. Cyclic voltammetry Dopant anions Electrochemical impedance spectroscopy Optically transparent electrodes Polypyrrole-flavin mononucleotide composite film UV-visible spectro-electrochemistry Aromatic polymers Chemical modification Cyclic voltammetry Electrostatics Molecular structure Nitrogen compounds Solutions Spectroscopy Flavin Optically transparent electrodes Polypyrrole Electrochemical electrodes Electrodes modified with polypyrrole-flavin mononucleotide composite film (PPy-FMN) have been studied by cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS) and UV-visible spectro-electrochemistry with optically transparent electrodes (OTE). Flavin molecules, electrostatically trapped in the composite film, act as dopant anions and can be reduced chemically by reduced PPy0 or electrochemically with a conducting PPy backbone connecting them to the underlying electrode. Both the electrochemistry and the electronic spectra of FMN entrapped in the PPy film markedly differ from those of FMN in aqueous solutions. These differences arise from the interactions of flavin molecules in a rigid matrix and the possibility of both chemical reduction of FMN by reduced PPy0 and flavin electro-reduction in the host polymer matrix. © 1998 Elsevier Science S.A. All rights reserved. Fil:Bonazzola, C. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Calvo, E.J. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_15726657_v449_n1-2_p111_Bonazzola |
institution |
Universidad de Buenos Aires |
institution_str |
I-28 |
repository_str |
R-134 |
collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
topic |
Cyclic voltammetry Dopant anions Electrochemical impedance spectroscopy Optically transparent electrodes Polypyrrole-flavin mononucleotide composite film UV-visible spectro-electrochemistry Aromatic polymers Chemical modification Cyclic voltammetry Electrostatics Molecular structure Nitrogen compounds Solutions Spectroscopy Flavin Optically transparent electrodes Polypyrrole Electrochemical electrodes |
spellingShingle |
Cyclic voltammetry Dopant anions Electrochemical impedance spectroscopy Optically transparent electrodes Polypyrrole-flavin mononucleotide composite film UV-visible spectro-electrochemistry Aromatic polymers Chemical modification Cyclic voltammetry Electrostatics Molecular structure Nitrogen compounds Solutions Spectroscopy Flavin Optically transparent electrodes Polypyrrole Electrochemical electrodes Bonazzola, C. Calvo, E.J. An electrochemical impedance and spectroelectrochemical study of the polypyrrole-flavin composite electrode |
topic_facet |
Cyclic voltammetry Dopant anions Electrochemical impedance spectroscopy Optically transparent electrodes Polypyrrole-flavin mononucleotide composite film UV-visible spectro-electrochemistry Aromatic polymers Chemical modification Cyclic voltammetry Electrostatics Molecular structure Nitrogen compounds Solutions Spectroscopy Flavin Optically transparent electrodes Polypyrrole Electrochemical electrodes |
description |
Electrodes modified with polypyrrole-flavin mononucleotide composite film (PPy-FMN) have been studied by cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS) and UV-visible spectro-electrochemistry with optically transparent electrodes (OTE). Flavin molecules, electrostatically trapped in the composite film, act as dopant anions and can be reduced chemically by reduced PPy0 or electrochemically with a conducting PPy backbone connecting them to the underlying electrode. Both the electrochemistry and the electronic spectra of FMN entrapped in the PPy film markedly differ from those of FMN in aqueous solutions. These differences arise from the interactions of flavin molecules in a rigid matrix and the possibility of both chemical reduction of FMN by reduced PPy0 and flavin electro-reduction in the host polymer matrix. © 1998 Elsevier Science S.A. All rights reserved. |
format |
JOUR |
author |
Bonazzola, C. Calvo, E.J. |
author_facet |
Bonazzola, C. Calvo, E.J. |
author_sort |
Bonazzola, C. |
title |
An electrochemical impedance and spectroelectrochemical study of the polypyrrole-flavin composite electrode |
title_short |
An electrochemical impedance and spectroelectrochemical study of the polypyrrole-flavin composite electrode |
title_full |
An electrochemical impedance and spectroelectrochemical study of the polypyrrole-flavin composite electrode |
title_fullStr |
An electrochemical impedance and spectroelectrochemical study of the polypyrrole-flavin composite electrode |
title_full_unstemmed |
An electrochemical impedance and spectroelectrochemical study of the polypyrrole-flavin composite electrode |
title_sort |
electrochemical impedance and spectroelectrochemical study of the polypyrrole-flavin composite electrode |
url |
http://hdl.handle.net/20.500.12110/paper_15726657_v449_n1-2_p111_Bonazzola |
work_keys_str_mv |
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