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dc.contributor.author
Planes, Gabriel Angel
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dc.contributor.author
Rodríguez, J. L.
dc.contributor.author
Miras, Maria Cristina
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dc.contributor.author
García, G.
dc.contributor.author
Pastor, E.
dc.contributor.author
Barbero, César Alfredo
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dc.date.available
2023-08-28T10:46:31Z
dc.date.issued
2010-02
dc.identifier.citation
Planes, Gabriel Angel; Rodríguez, J. L.; Miras, Maria Cristina; García, G.; Pastor, E.; et al.; Spectroscopic evidence for intermediate species formed during aniline polymerization and polyaniline degradation; Royal Society of Chemistry; Physical Chemistry Chemical Physics; 12; 35; 2-2010; 10584-10593
dc.identifier.issn
1463-9076
dc.identifier.uri
http://hdl.handle.net/11336/209460
dc.description.abstract
Spectroscopic methods are used to investigate the formation of low molecular mass intermediates during aniline (ANI) oxidation and polyaniline (PANI) degradation. Studying ANI anodic oxidation by in situ Fourier transform infrared spectroscopy (FTIRS) it is possible to obtain, for the first time, spectroscopic evidence for ANI dimers produced by head-to-tail (4-aminodiphenylamine, 4ADA) and tail-to-tail (benzidine, BZ) coupling of ANI cation radicals. The 4ADA dimer is adsorbed on the electrode surface during polymerization, as proved by cyclic voltammetry of thin PANI films and its infrared spectrum. This method also allows, with the help of computational simulations, to assign characteristic vibration frequencies for the different oxidation states of PANI. The presence of 4ADA retained inside thin polymer layers is established too. On the other hand, FTIRS demonstrates that the electrochemically promoted degradation of PANI renders p-benzoquinone as its main product. This compound, retained inside the film, is apparent in the cyclic voltammogram in the same potential region previously observed for 4ADA dimer. Therefore, applying in situ FTIRS is possible to distinguish between different chemical species (4ADA or p-benzoquinone) which give rise to voltammetric peaks in the same potential region. Indophenol and CO2 are also detected by FTIRS during ANI oxidation and polymer degradation. The formation of CO2 during degradation is confirmed by differential electrochemical mass spectroscopy. To the best of our knowledge, this is the first evidence of the oxidation of a conducting polymer to CO2 by electrochemical means. The relevance of the production of different intermediate species towards PANI fabrication and applications is discussed. © the Owner Societies.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Royal Society of Chemistry
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dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
FTIR
dc.subject
POLYANILINE
dc.subject
DEGRADATION
dc.subject
ELECTROPOLYMERIZATION
dc.subject.classification
Físico-Química, Ciencia de los Polímeros, Electroquímica
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dc.subject.classification
Ciencias Químicas
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dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
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dc.title
Spectroscopic evidence for intermediate species formed during aniline polymerization and polyaniline degradation
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2023-05-04T17:48:57Z
dc.identifier.eissn
0005-9021
dc.journal.volume
12
dc.journal.number
35
dc.journal.pagination
10584-10593
dc.journal.pais
Reino Unido
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dc.journal.ciudad
Cambridge
dc.description.fil
Fil: Planes, Gabriel Angel. Universidad Nacional de Río Cuarto. Facultad de Ciencias Exactas Fisicoquímicas y Naturales. Instituto de Investigaciones en Tecnologías Energéticas y Materiales Avanzados. - Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Investigaciones en Tecnologías Energéticas y Materiales Avanzados; Argentina
dc.description.fil
Fil: Rodríguez, J. L.. Universidad de La Laguna; España
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Fil: Miras, Maria Cristina. Universidad Nacional de Río Cuarto; Argentina
dc.description.fil
Fil: García, G.. Universidad de La Laguna; España
dc.description.fil
Fil: Pastor, E.. Universidad de La Laguna; España
dc.description.fil
Fil: Barbero, César Alfredo. Universidad Nacional de Río Cuarto. Facultad de Ciencias Exactas Fisicoquímicas y Naturales. Instituto de Investigaciones en Tecnologías Energéticas y Materiales Avanzados. - Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Investigaciones en Tecnologías Energéticas y Materiales Avanzados; Argentina
dc.journal.title
Physical Chemistry Chemical Physics
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dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/https://doi.org/10.1039/C002920C
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://pubs.rsc.org/en/content/articlelanding/2010/CP/c002920c
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