Quasi-equilibrium volume changes of polyaniline films upon redox switching. formal potential distribution and configurational modeling

The quasi-equilibrium electrochemomechanical behavior of relatively thick polyaniline films in sulfuric acid is investigated through experimental measurements and theoretical modeling. The leucoemeraldine (LE)-emeraldine (EM) conversion, or redox switching, is studied. The dependence of film volume...

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Autores principales: Lizarraga, Leonardo, Andrade, Estela María, Molina, Fernando Victor
Publicado: 2005
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Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_15206106_v109_n40_p18815_Lizarraga
http://hdl.handle.net/20.500.12110/paper_15206106_v109_n40_p18815_Lizarraga
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spelling paper:paper_15206106_v109_n40_p18815_Lizarraga2023-06-08T16:18:54Z Quasi-equilibrium volume changes of polyaniline films upon redox switching. formal potential distribution and configurational modeling Lizarraga, Leonardo Andrade, Estela María Molina, Fernando Victor Aromatic polymers Electrostatics Nitrogen compounds Polymers Redox reactions Statistical methods Sulfuric acid Electromechanical behavior Polyanilines Polymer deformation Redox switching Plastic films aniline derivative polyaniline polymer sulfuric acid article artificial membrane chemical model chemical structure chemistry electrochemistry oxidation reduction reaction Aniline Compounds Electrochemistry Membranes, Artificial Models, Chemical Molecular Structure Oxidation-Reduction Polymers Sulfuric Acids The quasi-equilibrium electrochemomechanical behavior of relatively thick polyaniline films in sulfuric acid is investigated through experimental measurements and theoretical modeling. The leucoemeraldine (LE)-emeraldine (EM) conversion, or redox switching, is studied. The dependence of film volume and electrochemical charge is determined as a function of applied potential. It is observed that the film volume follows the charge, showing an expansion during the second half of the LE-EM oxidation. The model postulates the existence of a stable intermediate, protoemeraldine (PE), with a formal potential distribution for the PE-EM reaction. The volume change is modeled statistically considering contributions from mixing, polymer deformation, and electrostatic charge. The model shows very good agreement with the experiments, indicating that, in the conditions studied, the deformation contribution dominates the volume changes as a result of the conformational modifications undergone by the polymer in the PE-EM oxidation. © 2005 American Chemical Society. Fil:Lizarraga, L. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Andrade, E.M. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Molina, F.V. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2005 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_15206106_v109_n40_p18815_Lizarraga http://hdl.handle.net/20.500.12110/paper_15206106_v109_n40_p18815_Lizarraga
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Aromatic polymers
Electrostatics
Nitrogen compounds
Polymers
Redox reactions
Statistical methods
Sulfuric acid
Electromechanical behavior
Polyanilines
Polymer deformation
Redox switching
Plastic films
aniline derivative
polyaniline
polymer
sulfuric acid
article
artificial membrane
chemical model
chemical structure
chemistry
electrochemistry
oxidation reduction reaction
Aniline Compounds
Electrochemistry
Membranes, Artificial
Models, Chemical
Molecular Structure
Oxidation-Reduction
Polymers
Sulfuric Acids
spellingShingle Aromatic polymers
Electrostatics
Nitrogen compounds
Polymers
Redox reactions
Statistical methods
Sulfuric acid
Electromechanical behavior
Polyanilines
Polymer deformation
Redox switching
Plastic films
aniline derivative
polyaniline
polymer
sulfuric acid
article
artificial membrane
chemical model
chemical structure
chemistry
electrochemistry
oxidation reduction reaction
Aniline Compounds
Electrochemistry
Membranes, Artificial
Models, Chemical
Molecular Structure
Oxidation-Reduction
Polymers
Sulfuric Acids
Lizarraga, Leonardo
Andrade, Estela María
Molina, Fernando Victor
Quasi-equilibrium volume changes of polyaniline films upon redox switching. formal potential distribution and configurational modeling
topic_facet Aromatic polymers
Electrostatics
Nitrogen compounds
Polymers
Redox reactions
Statistical methods
Sulfuric acid
Electromechanical behavior
Polyanilines
Polymer deformation
Redox switching
Plastic films
aniline derivative
polyaniline
polymer
sulfuric acid
article
artificial membrane
chemical model
chemical structure
chemistry
electrochemistry
oxidation reduction reaction
Aniline Compounds
Electrochemistry
Membranes, Artificial
Models, Chemical
Molecular Structure
Oxidation-Reduction
Polymers
Sulfuric Acids
description The quasi-equilibrium electrochemomechanical behavior of relatively thick polyaniline films in sulfuric acid is investigated through experimental measurements and theoretical modeling. The leucoemeraldine (LE)-emeraldine (EM) conversion, or redox switching, is studied. The dependence of film volume and electrochemical charge is determined as a function of applied potential. It is observed that the film volume follows the charge, showing an expansion during the second half of the LE-EM oxidation. The model postulates the existence of a stable intermediate, protoemeraldine (PE), with a formal potential distribution for the PE-EM reaction. The volume change is modeled statistically considering contributions from mixing, polymer deformation, and electrostatic charge. The model shows very good agreement with the experiments, indicating that, in the conditions studied, the deformation contribution dominates the volume changes as a result of the conformational modifications undergone by the polymer in the PE-EM oxidation. © 2005 American Chemical Society.
author Lizarraga, Leonardo
Andrade, Estela María
Molina, Fernando Victor
author_facet Lizarraga, Leonardo
Andrade, Estela María
Molina, Fernando Victor
author_sort Lizarraga, Leonardo
title Quasi-equilibrium volume changes of polyaniline films upon redox switching. formal potential distribution and configurational modeling
title_short Quasi-equilibrium volume changes of polyaniline films upon redox switching. formal potential distribution and configurational modeling
title_full Quasi-equilibrium volume changes of polyaniline films upon redox switching. formal potential distribution and configurational modeling
title_fullStr Quasi-equilibrium volume changes of polyaniline films upon redox switching. formal potential distribution and configurational modeling
title_full_unstemmed Quasi-equilibrium volume changes of polyaniline films upon redox switching. formal potential distribution and configurational modeling
title_sort quasi-equilibrium volume changes of polyaniline films upon redox switching. formal potential distribution and configurational modeling
publishDate 2005
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_15206106_v109_n40_p18815_Lizarraga
http://hdl.handle.net/20.500.12110/paper_15206106_v109_n40_p18815_Lizarraga
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AT andradeestelamaria quasiequilibriumvolumechangesofpolyanilinefilmsuponredoxswitchingformalpotentialdistributionandconfigurationalmodeling
AT molinafernandovictor quasiequilibriumvolumechangesofpolyanilinefilmsuponredoxswitchingformalpotentialdistributionandconfigurationalmodeling
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