Pyrolysis-gas chromatography/mass spectrometry applied to the identification of different states of polyaniline

Pyrolysis-gas chromatography/mass spectrometry (Py-CG/MS) has been applied to study and compare the composition of two electrochemically synthesized polyaniline (PANI) forms: fully reduced leucoemeraldine (LE) and intermediately oxidized emeraldine (EM). The different PANI forms were electrochemical...

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Detalles Bibliográficos
Autores principales:	Lizarraga, Leonardo, Molina, Fernando Victor
Publicado:	2007
Materias:	Conducting polymer Cyclic voltammetry Oxidation states Polymer structure Crosslinking Gas chromatography Mass spectrometry Oxidation Pyrolysis Synthesis (chemical) Aryl amine polymers Polyaniline
Acceso en línea:	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_01652370_v80_n2_p485_Lizarraga http://hdl.handle.net/20.500.12110/paper_01652370_v80_n2_p485_Lizarraga
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	paper:paper_01652370_v80_n2_p485_Lizarraga
record_format	dspace
spelling	paper:paper_01652370_v80_n2_p485_Lizarraga2023-06-08T15:14:49Z Pyrolysis-gas chromatography/mass spectrometry applied to the identification of different states of polyaniline Lizarraga, Leonardo Molina, Fernando Victor Conducting polymer Cyclic voltammetry Oxidation states Polymer structure Crosslinking Cyclic voltammetry Gas chromatography Mass spectrometry Oxidation Pyrolysis Synthesis (chemical) Aryl amine polymers Oxidation states Polymer structure Polyaniline Pyrolysis-gas chromatography/mass spectrometry (Py-CG/MS) has been applied to study and compare the composition of two electrochemically synthesized polyaniline (PANI) forms: fully reduced leucoemeraldine (LE) and intermediately oxidized emeraldine (EM). The different PANI forms were electrochemically synthesized using cyclic voltammetry. They were dedoped by stirring for 24 h in ammoniacal solutions. Leucoemeraldine and emeraldine pyrograms presented differences in the relative intensity of their fragment signals. Emeraldine pyrograms presented a higher relative intensity of the signals associated to oxidized fragments (i.e. quinone imine) than leucoemeraldine pyrograms. On the other hand, polymer samples synthesized under different anodic potentials showed small differences, consistent with a higher degree of crosslinking at higher anodic potentials. The results obtained indicate that Py-GC/MS may be used for identification among different oxidation states in aryl amine polymers. © 2007 Elsevier B.V. All rights reserved. Fil:Lizarraga, L. 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. 2007 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_01652370_v80_n2_p485_Lizarraga http://hdl.handle.net/20.500.12110/paper_01652370_v80_n2_p485_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	Conducting polymer Cyclic voltammetry Oxidation states Polymer structure Crosslinking Cyclic voltammetry Gas chromatography Mass spectrometry Oxidation Pyrolysis Synthesis (chemical) Aryl amine polymers Oxidation states Polymer structure Polyaniline
spellingShingle	Conducting polymer Cyclic voltammetry Oxidation states Polymer structure Crosslinking Cyclic voltammetry Gas chromatography Mass spectrometry Oxidation Pyrolysis Synthesis (chemical) Aryl amine polymers Oxidation states Polymer structure Polyaniline Lizarraga, Leonardo Molina, Fernando Victor Pyrolysis-gas chromatography/mass spectrometry applied to the identification of different states of polyaniline
topic_facet	Conducting polymer Cyclic voltammetry Oxidation states Polymer structure Crosslinking Cyclic voltammetry Gas chromatography Mass spectrometry Oxidation Pyrolysis Synthesis (chemical) Aryl amine polymers Oxidation states Polymer structure Polyaniline
description	Pyrolysis-gas chromatography/mass spectrometry (Py-CG/MS) has been applied to study and compare the composition of two electrochemically synthesized polyaniline (PANI) forms: fully reduced leucoemeraldine (LE) and intermediately oxidized emeraldine (EM). The different PANI forms were electrochemically synthesized using cyclic voltammetry. They were dedoped by stirring for 24 h in ammoniacal solutions. Leucoemeraldine and emeraldine pyrograms presented differences in the relative intensity of their fragment signals. Emeraldine pyrograms presented a higher relative intensity of the signals associated to oxidized fragments (i.e. quinone imine) than leucoemeraldine pyrograms. On the other hand, polymer samples synthesized under different anodic potentials showed small differences, consistent with a higher degree of crosslinking at higher anodic potentials. The results obtained indicate that Py-GC/MS may be used for identification among different oxidation states in aryl amine polymers. © 2007 Elsevier B.V. All rights reserved.
author	Lizarraga, Leonardo Molina, Fernando Victor
author_facet	Lizarraga, Leonardo Molina, Fernando Victor
author_sort	Lizarraga, Leonardo
title	Pyrolysis-gas chromatography/mass spectrometry applied to the identification of different states of polyaniline
title_short	Pyrolysis-gas chromatography/mass spectrometry applied to the identification of different states of polyaniline
title_full	Pyrolysis-gas chromatography/mass spectrometry applied to the identification of different states of polyaniline
title_fullStr	Pyrolysis-gas chromatography/mass spectrometry applied to the identification of different states of polyaniline
title_full_unstemmed	Pyrolysis-gas chromatography/mass spectrometry applied to the identification of different states of polyaniline
title_sort	pyrolysis-gas chromatography/mass spectrometry applied to the identification of different states of polyaniline
publishDate	2007
url	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_01652370_v80_n2_p485_Lizarraga http://hdl.handle.net/20.500.12110/paper_01652370_v80_n2_p485_Lizarraga
work_keys_str_mv	AT lizarragaleonardo pyrolysisgaschromatographymassspectrometryappliedtotheidentificationofdifferentstatesofpolyaniline AT molinafernandovictor pyrolysisgaschromatographymassspectrometryappliedtotheidentificationofdifferentstatesofpolyaniline
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Pyrolysis-gas chromatography/mass spectrometry applied to the identification of different states of polyaniline

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