One-electron oxidation of antioxidants: A kinetic-thermodynamic correlation

Autores
Villata, Laura Sofía; Berkovic, Andrea; González, Mónica Cristina; Mártire, Daniel Osvaldo
Año de publicación
2013
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The values of the bimolecular rate constants for the reactions of 2,2′-azino-bis(3-ethylbenz-thiazoline-6-sulfonic acid) radical cation with epicatechin (((2.4 ± 0.2)) s−1 M−1), and epigallocatechingallate ((29 ± 5) s−1 M−1) were obtained by spectrophotometric measurements. We propose a correlation between the Gibbs energy ΔGº for the one-electron charge-transfer reactions from several antioxidants to radical species and the rate constants of the corresponding bimolecular reactions. This correlation can be used to predict rate constants of reactions of known ΔGº values.
Facultad de Ciencias Exactas
Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas
Materia
Ciencias Exactas
Física
Química
ABTS
antioxidants
epicatechin
epigallocatechingallate
kinetic-thermodynamic correlation
Nivel de accesibilidad
acceso abierto
Condiciones de uso
http://creativecommons.org/licenses/by-nc-sa/4.0/
Repositorio
SEDICI (UNLP)
Institución
Universidad Nacional de La Plata
OAI Identificador
oai:sedici.unlp.edu.ar:10915/106565
Acceder
id SEDICI_6e8fec29b3dcde59365b619cbda11056
oai_identifier_str oai:sedici.unlp.edu.ar:10915/106565
network_acronym_str SEDICI
repository_id_str 1329
network_name_str SEDICI (UNLP)
spelling One-electron oxidation of antioxidants: A kinetic-thermodynamic correlationVillata, Laura SofíaBerkovic, AndreaGonzález, Mónica CristinaMártire, Daniel OsvaldoCiencias ExactasFísicaQuímicaABTSantioxidantsepicatechinepigallocatechingallatekinetic-thermodynamic correlationThe values of the bimolecular rate constants for the reactions of 2,2′-azino-bis(3-ethylbenz-thiazoline-6-sulfonic acid) radical cation with epicatechin (((2.4 ± 0.2)) s<sup>−1</sup> M<sup>−1</sup>), and epigallocatechingallate ((29 ± 5) s<sup>−1</sup> M<sup>−1</sup>) were obtained by spectrophotometric measurements. We propose a correlation between the Gibbs energy ΔGº for the one-electron charge-transfer reactions from several antioxidants to radical species and the rate constants of the corresponding bimolecular reactions. This correlation can be used to predict rate constants of reactions of known ΔGº values.Facultad de Ciencias ExactasInstituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas2013info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdf205-209http://sedici.unlp.edu.ar/handle/10915/106565enginfo:eu-repo/semantics/altIdentifier/url/http://europepmc.org/backend/ptpmcrender.fcgi?accid=PMC6837577&blobtype=pdfinfo:eu-repo/semantics/altIdentifier/issn/1743-2928info:eu-repo/semantics/altIdentifier/pmid/24020720info:eu-repo/semantics/altIdentifier/doi/10.1179/1351000213Y.0000000063info:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-nc-sa/4.0/Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)reponame:SEDICI (UNLP)instname:Universidad Nacional de La Platainstacron:UNLP2025-09-29T11:23:52Zoai:sedici.unlp.edu.ar:10915/106565Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-09-29 11:23:53.066SEDICI (UNLP) - Universidad Nacional de La Platafalse
dc.title.none.fl_str_mv One-electron oxidation of antioxidants: A kinetic-thermodynamic correlation
title One-electron oxidation of antioxidants: A kinetic-thermodynamic correlation
spellingShingle One-electron oxidation of antioxidants: A kinetic-thermodynamic correlation
Villata, Laura Sofía
Ciencias Exactas
Física
Química
ABTS
antioxidants
epicatechin
epigallocatechingallate
kinetic-thermodynamic correlation
title_short One-electron oxidation of antioxidants: A kinetic-thermodynamic correlation
title_full One-electron oxidation of antioxidants: A kinetic-thermodynamic correlation
title_fullStr One-electron oxidation of antioxidants: A kinetic-thermodynamic correlation
title_full_unstemmed One-electron oxidation of antioxidants: A kinetic-thermodynamic correlation
title_sort One-electron oxidation of antioxidants: A kinetic-thermodynamic correlation
dc.creator.none.fl_str_mv Villata, Laura Sofía
Berkovic, Andrea
González, Mónica Cristina
Mártire, Daniel Osvaldo
author Villata, Laura Sofía
author_facet Villata, Laura Sofía
Berkovic, Andrea
González, Mónica Cristina
Mártire, Daniel Osvaldo
author_role author
author2 Berkovic, Andrea
González, Mónica Cristina
Mártire, Daniel Osvaldo
author2_role author
author
author
dc.subject.none.fl_str_mv Ciencias Exactas
Física
Química
ABTS
antioxidants
epicatechin
epigallocatechingallate
kinetic-thermodynamic correlation
topic Ciencias Exactas
Física
Química
ABTS
antioxidants
epicatechin
epigallocatechingallate
kinetic-thermodynamic correlation
dc.description.none.fl_txt_mv The values of the bimolecular rate constants for the reactions of 2,2′-azino-bis(3-ethylbenz-thiazoline-6-sulfonic acid) radical cation with epicatechin (((2.4 ± 0.2)) s<sup>−1</sup> M<sup>−1</sup>), and epigallocatechingallate ((29 ± 5) s<sup>−1</sup> M<sup>−1</sup>) were obtained by spectrophotometric measurements. We propose a correlation between the Gibbs energy ΔGº for the one-electron charge-transfer reactions from several antioxidants to radical species and the rate constants of the corresponding bimolecular reactions. This correlation can be used to predict rate constants of reactions of known ΔGº values.
Facultad de Ciencias Exactas
Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas
description The values of the bimolecular rate constants for the reactions of 2,2′-azino-bis(3-ethylbenz-thiazoline-6-sulfonic acid) radical cation with epicatechin (((2.4 ± 0.2)) s<sup>−1</sup> M<sup>−1</sup>), and epigallocatechingallate ((29 ± 5) s<sup>−1</sup> M<sup>−1</sup>) were obtained by spectrophotometric measurements. We propose a correlation between the Gibbs energy ΔGº for the one-electron charge-transfer reactions from several antioxidants to radical species and the rate constants of the corresponding bimolecular reactions. This correlation can be used to predict rate constants of reactions of known ΔGº values.
publishDate 2013
dc.date.none.fl_str_mv 2013
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Articulo
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://sedici.unlp.edu.ar/handle/10915/106565
url http://sedici.unlp.edu.ar/handle/10915/106565
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/http://europepmc.org/backend/ptpmcrender.fcgi?accid=PMC6837577&blobtype=pdf
info:eu-repo/semantics/altIdentifier/issn/1743-2928
info:eu-repo/semantics/altIdentifier/pmid/24020720
info:eu-repo/semantics/altIdentifier/doi/10.1179/1351000213Y.0000000063
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by-nc-sa/4.0/
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
eu_rights_str_mv openAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by-nc-sa/4.0/
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
dc.format.none.fl_str_mv application/pdf
205-209
dc.source.none.fl_str_mv reponame:SEDICI (UNLP)
instname:Universidad Nacional de La Plata
instacron:UNLP
reponame_str SEDICI (UNLP)
collection SEDICI (UNLP)
instname_str Universidad Nacional de La Plata
instacron_str UNLP
institution UNLP
repository.name.fl_str_mv SEDICI (UNLP) - Universidad Nacional de La Plata
repository.mail.fl_str_mv alira@sedici.unlp.edu.ar
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score 13.070432

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