Acid-base equilibrium in conducting polymers. The case of reduced polyaniline

Autores
Marmisollé, Waldemar Alejandro; Florit, Maria Ines; Posadas, Dionisio
Año de publicación
2014
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The understanding of the acid-base properties of conducting polymers (CPs) is essential for a rational design of devices based on this type of materials. Much of the work about polyaniline protonation equilibrium is focused on the emeraldine form. However, for the complete description of the pH effect on the electrochemical behaviour, it is required the knowledge of proton binding equilibrium to both the reduced (leucoemeraldine) and the oxidized (emeraldine) forms. In this work, the acid-base titration of polyaniline films was performed by spectroelectrochemistry at constant applied potentials so to keep the polymer in its reduced form. The values of the apparent dissociation constant, pKa,app, result to be about 1. The analysis of the proton binding degree as a function of pH allows determining the distribution of dissociation constants. This distribution is interpreted in terms of a simple thermodynamic statistical model, that allows determining the internal dissociation constant, pKa,int c.a. 1.3. Comparison with the pKa values of related monomers reinforces the results obtained in this work.
Fil: Marmisollé, Waldemar Alejandro. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico la Plata. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas; Argentina. Universidad Nacional de La Plata; Argentina
Fil: Florit, Maria Ines. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico la Plata. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas; Argentina. Universidad Nacional de La Plata; Argentina
Fil: Posadas, Dionisio. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico la Plata. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas; Argentina. Universidad Nacional de La Plata; Argentina
Materia
Reduced Polyaniline
Leucoemeraldine
Pka
Acid-Base Equilibrium
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/5129
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/5129
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Acid-base equilibrium in conducting polymers. The case of reduced polyanilineMarmisollé, Waldemar AlejandroFlorit, Maria InesPosadas, DionisioReduced PolyanilineLeucoemeraldinePkaAcid-Base Equilibriumhttps://purl.org/becyt/ford/1.4https://purl.org/becyt/ford/1The understanding of the acid-base properties of conducting polymers (CPs) is essential for a rational design of devices based on this type of materials. Much of the work about polyaniline protonation equilibrium is focused on the emeraldine form. However, for the complete description of the pH effect on the electrochemical behaviour, it is required the knowledge of proton binding equilibrium to both the reduced (leucoemeraldine) and the oxidized (emeraldine) forms. In this work, the acid-base titration of polyaniline films was performed by spectroelectrochemistry at constant applied potentials so to keep the polymer in its reduced form. The values of the apparent dissociation constant, pKa,app, result to be about 1. The analysis of the proton binding degree as a function of pH allows determining the distribution of dissociation constants. This distribution is interpreted in terms of a simple thermodynamic statistical model, that allows determining the internal dissociation constant, pKa,int c.a. 1.3. Comparison with the pKa values of related monomers reinforces the results obtained in this work.Fil: Marmisollé, Waldemar Alejandro. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico la Plata. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas; Argentina. Universidad Nacional de La Plata; ArgentinaFil: Florit, Maria Ines. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico la Plata. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas; Argentina. Universidad Nacional de La Plata; ArgentinaFil: Posadas, Dionisio. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico la Plata. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas; Argentina. Universidad Nacional de La Plata; ArgentinaElsevier2014-11info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/5129Marmisollé, Waldemar Alejandro; Florit, Maria Ines; Posadas, Dionisio; Acid-base equilibrium in conducting polymers. The case of reduced polyaniline; Elsevier; Journal Of Electroanalytical Chemistry - (print); 734; 11-2014; 10-171572-6657enginfo:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S1572665714000903info:eu-repo/semantics/altIdentifier/doi/info:eu-repo/semantics/altIdentifier/doi/10.1016/j.jelechem.2014.03.003info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-nd/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-17T10:55:38Zoai:ri.conicet.gov.ar:11336/5129instacron: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:34982025-09-17 10:55:38.509CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Acid-base equilibrium in conducting polymers. The case of reduced polyaniline
title Acid-base equilibrium in conducting polymers. The case of reduced polyaniline
spellingShingle Acid-base equilibrium in conducting polymers. The case of reduced polyaniline
Marmisollé, Waldemar Alejandro
Reduced Polyaniline
Leucoemeraldine
Pka
Acid-Base Equilibrium
title_short Acid-base equilibrium in conducting polymers. The case of reduced polyaniline
title_full Acid-base equilibrium in conducting polymers. The case of reduced polyaniline
title_fullStr Acid-base equilibrium in conducting polymers. The case of reduced polyaniline
title_full_unstemmed Acid-base equilibrium in conducting polymers. The case of reduced polyaniline
title_sort Acid-base equilibrium in conducting polymers. The case of reduced polyaniline
dc.creator.none.fl_str_mv Marmisollé, Waldemar Alejandro
Florit, Maria Ines
Posadas, Dionisio
author Marmisollé, Waldemar Alejandro
author_facet Marmisollé, Waldemar Alejandro
Florit, Maria Ines
Posadas, Dionisio
author_role author
author2 Florit, Maria Ines
Posadas, Dionisio
author2_role author
author
dc.subject.none.fl_str_mv Reduced Polyaniline
Leucoemeraldine
Pka
Acid-Base Equilibrium
topic Reduced Polyaniline
Leucoemeraldine
Pka
Acid-Base Equilibrium
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 understanding of the acid-base properties of conducting polymers (CPs) is essential for a rational design of devices based on this type of materials. Much of the work about polyaniline protonation equilibrium is focused on the emeraldine form. However, for the complete description of the pH effect on the electrochemical behaviour, it is required the knowledge of proton binding equilibrium to both the reduced (leucoemeraldine) and the oxidized (emeraldine) forms. In this work, the acid-base titration of polyaniline films was performed by spectroelectrochemistry at constant applied potentials so to keep the polymer in its reduced form. The values of the apparent dissociation constant, pKa,app, result to be about 1. The analysis of the proton binding degree as a function of pH allows determining the distribution of dissociation constants. This distribution is interpreted in terms of a simple thermodynamic statistical model, that allows determining the internal dissociation constant, pKa,int c.a. 1.3. Comparison with the pKa values of related monomers reinforces the results obtained in this work.
Fil: Marmisollé, Waldemar Alejandro. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico la Plata. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas; Argentina. Universidad Nacional de La Plata; Argentina
Fil: Florit, Maria Ines. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico la Plata. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas; Argentina. Universidad Nacional de La Plata; Argentina
Fil: Posadas, Dionisio. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico la Plata. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas; Argentina. Universidad Nacional de La Plata; Argentina
description The understanding of the acid-base properties of conducting polymers (CPs) is essential for a rational design of devices based on this type of materials. Much of the work about polyaniline protonation equilibrium is focused on the emeraldine form. However, for the complete description of the pH effect on the electrochemical behaviour, it is required the knowledge of proton binding equilibrium to both the reduced (leucoemeraldine) and the oxidized (emeraldine) forms. In this work, the acid-base titration of polyaniline films was performed by spectroelectrochemistry at constant applied potentials so to keep the polymer in its reduced form. The values of the apparent dissociation constant, pKa,app, result to be about 1. The analysis of the proton binding degree as a function of pH allows determining the distribution of dissociation constants. This distribution is interpreted in terms of a simple thermodynamic statistical model, that allows determining the internal dissociation constant, pKa,int c.a. 1.3. Comparison with the pKa values of related monomers reinforces the results obtained in this work.
publishDate 2014
dc.date.none.fl_str_mv 2014-11
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/11336/5129
Marmisollé, Waldemar Alejandro; Florit, Maria Ines; Posadas, Dionisio; Acid-base equilibrium in conducting polymers. The case of reduced polyaniline; Elsevier; Journal Of Electroanalytical Chemistry - (print); 734; 11-2014; 10-17
1572-6657
url http://hdl.handle.net/11336/5129
identifier_str_mv Marmisollé, Waldemar Alejandro; Florit, Maria Ines; Posadas, Dionisio; Acid-base equilibrium in conducting polymers. The case of reduced polyaniline; Elsevier; Journal Of Electroanalytical Chemistry - (print); 734; 11-2014; 10-17
1572-6657
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S1572665714000903
info:eu-repo/semantics/altIdentifier/doi/
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.jelechem.2014.03.003
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
dc.format.none.fl_str_mv 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
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score 13.000565

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