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 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.
Main Authors: | , , , |
---|---|
Other Authors: | |
Format: | artículo biblioteca |
Language: | English |
Published: |
Elsevier
2007
|
Online Access: | http://hdl.handle.net/10261/58702 http://dx.doi.org/10.13039/501100005363 http://dx.doi.org/10.13039/501100002923 http://dx.doi.org/10.13039/501100003074 |
Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
id |
dig-irnas-es-10261-58702 |
---|---|
record_format |
koha |
spelling |
dig-irnas-es-10261-587022018-09-11T12:29:46Z Pyrolysis-gas chromatography/mass spectrometry applied to the identification of different states of polyaniline Lizárraga, L. Verdejo Robles, Trinidad Molina, F. J. González-Vila, Francisco Javier Universidad de Buenos Aires Consejo Nacional de Investigaciones Científicas y Técnicas (Argentina) Agencia Nacional de Promoción Científica y Tecnológica (Argentina) 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. The authors acknowledge financial support from the Universidad de Buenos Aires (UBACYT 2004–2007 X105), the Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET, PIP 02287) and the Agencia Nacional de Promoción Científica y Tecnológica (grant N° 06-12467) from Argentina. L.L. is indebted to the Universidad de Buenos Aires for an R.H. Tallman fellowship which supported his stay in Spain. F.V.M. is a member of the Carrera del Investigador Científico of CONICET. Peer Reviewed 2012-10-23T12:03:59Z 2012-10-23T12:03:59Z 2007 2012-10-23T12:03:59Z artículo http://purl.org/coar/resource_type/c_6501 doi: 10.1016/j.jaap.2007.02.007 issn: 0165-2370 Journal of Analytical and Applied Pyrolysis 80(2): 485- 488 (2007) http://hdl.handle.net/10261/58702 10.1016/j.jaap.2007.02.007 http://dx.doi.org/10.13039/501100005363 http://dx.doi.org/10.13039/501100002923 http://dx.doi.org/10.13039/501100003074 en none Elsevier |
institution |
IRNAS ES |
collection |
DSpace |
country |
España |
countrycode |
ES |
component |
Bibliográfico |
access |
En linea |
databasecode |
dig-irnas-es |
tag |
biblioteca |
region |
Europa del Sur |
libraryname |
Biblioteca del IRNAS España |
language |
English |
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. |
author2 |
Universidad de Buenos Aires |
author_facet |
Universidad de Buenos Aires Lizárraga, L. Verdejo Robles, Trinidad Molina, F. J. González-Vila, Francisco Javier |
format |
artículo |
author |
Lizárraga, L. Verdejo Robles, Trinidad Molina, F. J. González-Vila, Francisco Javier |
spellingShingle |
Lizárraga, L. Verdejo Robles, Trinidad Molina, F. J. González-Vila, Francisco Javier Pyrolysis-gas chromatography/mass spectrometry applied to the identification of different states of polyaniline |
author_sort |
Lizárraga, L. |
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 |
publisher |
Elsevier |
publishDate |
2007 |
url |
http://hdl.handle.net/10261/58702 http://dx.doi.org/10.13039/501100005363 http://dx.doi.org/10.13039/501100002923 http://dx.doi.org/10.13039/501100003074 |
work_keys_str_mv |
AT lizarragal pyrolysisgaschromatographymassspectrometryappliedtotheidentificationofdifferentstatesofpolyaniline AT verdejoroblestrinidad pyrolysisgaschromatographymassspectrometryappliedtotheidentificationofdifferentstatesofpolyaniline AT molinafj pyrolysisgaschromatographymassspectrometryappliedtotheidentificationofdifferentstatesofpolyaniline AT gonzalezvilafranciscojavier pyrolysisgaschromatographymassspectrometryappliedtotheidentificationofdifferentstatesofpolyaniline |
_version_ |
1777664402659475456 |