Electrochemical oxidation of fisetin: Studies related to its adsorption on glassy carbon electrodes

Autores
Maza, Eliana María; Moressi, Marcela Beatriz; Fernández, Héctor; Zon, María Alicia
Año de publicación
2012
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The electrochemical oxidation of fisetin (FIS) on glassy carbon (GC) electrodes is studied in 15% dimethyl sulfoxide (DMSO) +85% pH 4.00 and 7.00 buffer solutions by cyclic (CV) and square-wave (SWV) voltammetries. The first oxidation peak of FIS showed an adsorption/diffusion mixed control, when studies were performed in solutions in the presence of FIS. Therefore, the FIS adsorption on the GC electrode surface could be inferred from cyclic voltammograms recorded in supporting electrolyte solutions, where a quasi-reversible redox couple was defined at both pH values. These findings show that both the reactant and the product of the electrode process are adsorbed on the electrode surface, being the surface redox couple slightly better defined at pH 4.00 than 7.00. The Frumkin adsorption isotherm was the best to describe the specific interaction of FIS with GC electrodes, using a fitting procedure of experimental fractional surface coverage (θ) vs. FIS bulk concentration (cFIS). Moreover, we used the SWV to obtain a full characterization of the surface redox couple, applying the combination of the "quasi-reversible maximum" and the "splitting of the net voltammetric peak" methods. Values of (0.340 ± 0.003) V, 41 s-1, and (0.49 ± 0.04) were determined for the formal potential, the formal rate constant, and the anodic transfer coefficient, respectively.
Fil: Maza, Eliana María. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas, Físicas y Naturales. Departamento de Química; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba; Argentina
Fil: Moressi, Marcela Beatriz. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas, Físicas y Naturales. Departamento de Química; Argentina
Fil: Fernández, Héctor. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas, Físicas y Naturales. Departamento de Química; Argentina
Fil: Zon, María Alicia. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas, Físicas y Naturales. Departamento de Química; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba; Argentina
Materia
ADSORPTION
CYCLIC VOLTAMMETRY
FISETIN
SQUARE WAVE VOLTAMMETRY
THERMODYNAMIC AND KINETICS PARAMETERS
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/198039
Acceder
id CONICETDig_d486f86cec958951f98c2368dda55150
oai_identifier_str oai:ri.conicet.gov.ar:11336/198039
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Electrochemical oxidation of fisetin: Studies related to its adsorption on glassy carbon electrodesMaza, Eliana MaríaMoressi, Marcela BeatrizFernández, HéctorZon, María AliciaADSORPTIONCYCLIC VOLTAMMETRYFISETINSQUARE WAVE VOLTAMMETRYTHERMODYNAMIC AND KINETICS PARAMETERShttps://purl.org/becyt/ford/1.4https://purl.org/becyt/ford/1The electrochemical oxidation of fisetin (FIS) on glassy carbon (GC) electrodes is studied in 15% dimethyl sulfoxide (DMSO) +85% pH 4.00 and 7.00 buffer solutions by cyclic (CV) and square-wave (SWV) voltammetries. The first oxidation peak of FIS showed an adsorption/diffusion mixed control, when studies were performed in solutions in the presence of FIS. Therefore, the FIS adsorption on the GC electrode surface could be inferred from cyclic voltammograms recorded in supporting electrolyte solutions, where a quasi-reversible redox couple was defined at both pH values. These findings show that both the reactant and the product of the electrode process are adsorbed on the electrode surface, being the surface redox couple slightly better defined at pH 4.00 than 7.00. The Frumkin adsorption isotherm was the best to describe the specific interaction of FIS with GC electrodes, using a fitting procedure of experimental fractional surface coverage (θ) vs. FIS bulk concentration (cFIS). Moreover, we used the SWV to obtain a full characterization of the surface redox couple, applying the combination of the "quasi-reversible maximum" and the "splitting of the net voltammetric peak" methods. Values of (0.340 ± 0.003) V, 41 s-1, and (0.49 ± 0.04) were determined for the formal potential, the formal rate constant, and the anodic transfer coefficient, respectively.Fil: Maza, Eliana María. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas, Físicas y Naturales. Departamento de Química; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba; ArgentinaFil: Moressi, Marcela Beatriz. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas, Físicas y Naturales. Departamento de Química; ArgentinaFil: Fernández, Héctor. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas, Físicas y Naturales. Departamento de Química; ArgentinaFil: Zon, María Alicia. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas, Físicas y Naturales. Departamento de Química; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba; ArgentinaElsevier2012-05info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/198039Maza, Eliana María; Moressi, Marcela Beatriz; Fernández, Héctor; Zon, María Alicia; Electrochemical oxidation of fisetin: Studies related to its adsorption on glassy carbon electrodes; Elsevier; Journal of Electroanalytical Chemistry; 675; 5-2012; 11-170022-07281572-6657CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S1572665712001592info:eu-repo/semantics/altIdentifier/doi/10.1016/j.jelechem.2012.04.022info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-03T09:57:35Zoai:ri.conicet.gov.ar:11336/198039instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-03 09:57:35.389CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Electrochemical oxidation of fisetin: Studies related to its adsorption on glassy carbon electrodes
title Electrochemical oxidation of fisetin: Studies related to its adsorption on glassy carbon electrodes
spellingShingle Electrochemical oxidation of fisetin: Studies related to its adsorption on glassy carbon electrodes
Maza, Eliana María
ADSORPTION
CYCLIC VOLTAMMETRY
FISETIN
SQUARE WAVE VOLTAMMETRY
THERMODYNAMIC AND KINETICS PARAMETERS
title_short Electrochemical oxidation of fisetin: Studies related to its adsorption on glassy carbon electrodes
title_full Electrochemical oxidation of fisetin: Studies related to its adsorption on glassy carbon electrodes
title_fullStr Electrochemical oxidation of fisetin: Studies related to its adsorption on glassy carbon electrodes
title_full_unstemmed Electrochemical oxidation of fisetin: Studies related to its adsorption on glassy carbon electrodes
title_sort Electrochemical oxidation of fisetin: Studies related to its adsorption on glassy carbon electrodes
dc.creator.none.fl_str_mv Maza, Eliana María
Moressi, Marcela Beatriz
Fernández, Héctor
Zon, María Alicia
author Maza, Eliana María
author_facet Maza, Eliana María
Moressi, Marcela Beatriz
Fernández, Héctor
Zon, María Alicia
author_role author
author2 Moressi, Marcela Beatriz
Fernández, Héctor
Zon, María Alicia
author2_role author
author
author
dc.subject.none.fl_str_mv ADSORPTION
CYCLIC VOLTAMMETRY
FISETIN
SQUARE WAVE VOLTAMMETRY
THERMODYNAMIC AND KINETICS PARAMETERS
topic ADSORPTION
CYCLIC VOLTAMMETRY
FISETIN
SQUARE WAVE VOLTAMMETRY
THERMODYNAMIC AND KINETICS PARAMETERS
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.4
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv The electrochemical oxidation of fisetin (FIS) on glassy carbon (GC) electrodes is studied in 15% dimethyl sulfoxide (DMSO) +85% pH 4.00 and 7.00 buffer solutions by cyclic (CV) and square-wave (SWV) voltammetries. The first oxidation peak of FIS showed an adsorption/diffusion mixed control, when studies were performed in solutions in the presence of FIS. Therefore, the FIS adsorption on the GC electrode surface could be inferred from cyclic voltammograms recorded in supporting electrolyte solutions, where a quasi-reversible redox couple was defined at both pH values. These findings show that both the reactant and the product of the electrode process are adsorbed on the electrode surface, being the surface redox couple slightly better defined at pH 4.00 than 7.00. The Frumkin adsorption isotherm was the best to describe the specific interaction of FIS with GC electrodes, using a fitting procedure of experimental fractional surface coverage (θ) vs. FIS bulk concentration (cFIS). Moreover, we used the SWV to obtain a full characterization of the surface redox couple, applying the combination of the "quasi-reversible maximum" and the "splitting of the net voltammetric peak" methods. Values of (0.340 ± 0.003) V, 41 s-1, and (0.49 ± 0.04) were determined for the formal potential, the formal rate constant, and the anodic transfer coefficient, respectively.
Fil: Maza, Eliana María. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas, Físicas y Naturales. Departamento de Química; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba; Argentina
Fil: Moressi, Marcela Beatriz. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas, Físicas y Naturales. Departamento de Química; Argentina
Fil: Fernández, Héctor. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas, Físicas y Naturales. Departamento de Química; Argentina
Fil: Zon, María Alicia. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas, Físicas y Naturales. Departamento de Química; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba; Argentina
description The electrochemical oxidation of fisetin (FIS) on glassy carbon (GC) electrodes is studied in 15% dimethyl sulfoxide (DMSO) +85% pH 4.00 and 7.00 buffer solutions by cyclic (CV) and square-wave (SWV) voltammetries. The first oxidation peak of FIS showed an adsorption/diffusion mixed control, when studies were performed in solutions in the presence of FIS. Therefore, the FIS adsorption on the GC electrode surface could be inferred from cyclic voltammograms recorded in supporting electrolyte solutions, where a quasi-reversible redox couple was defined at both pH values. These findings show that both the reactant and the product of the electrode process are adsorbed on the electrode surface, being the surface redox couple slightly better defined at pH 4.00 than 7.00. The Frumkin adsorption isotherm was the best to describe the specific interaction of FIS with GC electrodes, using a fitting procedure of experimental fractional surface coverage (θ) vs. FIS bulk concentration (cFIS). Moreover, we used the SWV to obtain a full characterization of the surface redox couple, applying the combination of the "quasi-reversible maximum" and the "splitting of the net voltammetric peak" methods. Values of (0.340 ± 0.003) V, 41 s-1, and (0.49 ± 0.04) were determined for the formal potential, the formal rate constant, and the anodic transfer coefficient, respectively.
publishDate 2012
dc.date.none.fl_str_mv 2012-05
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/198039
Maza, Eliana María; Moressi, Marcela Beatriz; Fernández, Héctor; Zon, María Alicia; Electrochemical oxidation of fisetin: Studies related to its adsorption on glassy carbon electrodes; Elsevier; Journal of Electroanalytical Chemistry; 675; 5-2012; 11-17
0022-0728
1572-6657
CONICET Digital
CONICET
url http://hdl.handle.net/11336/198039
identifier_str_mv Maza, Eliana María; Moressi, Marcela Beatriz; Fernández, Héctor; Zon, María Alicia; Electrochemical oxidation of fisetin: Studies related to its adsorption on glassy carbon electrodes; Elsevier; Journal of Electroanalytical Chemistry; 675; 5-2012; 11-17
0022-0728
1572-6657
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S1572665712001592
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.jelechem.2012.04.022
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
application/pdf
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
_version_ 1842269470696931328
score 13.13397

Publicaciones similares