Self-aggregation in pyrrole: Matrix isolation, solid state infrared spectroscopy, and DFT study
- Autores
- Gomez Zavaglia, Andrea; Fausto, Rui
- Año de publicación
- 2004
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- Pyrrole (C4H5N) was embedded in low-temperature solid inert matrixes (argon, xenon; T = 9 K.) and both the monomer and low-order aggregates characterized by FTIR spectroscopy. The spectroscopic studies were complemented by extensive theoretical [DFT(B3LYP)/6-311++G(d,p)] structural and vibrational studies carried out for the monomer and their self-aggregates (up to four units). The calculated spectrum for monomeric pyrrole fits well those obtained immediately after deposition (at 9 K) of diluted matrixes, which can be prepared keeping the compound at low temperature before deposition and using low fluxes of the sublimate. Annealing of the matrixes to higher temperatures or increasing of the gaseous flux during deposition leads to aggregation, which can be easily recognized spectroscopically. On the basis of the theoretically predicted spectra for the monomer, dimer, trimers, and tetramers of pyrrole, assignments were proposed for the experimentally observed bands. It was also found that the formation of the hydrogen-bonded clusters shows a significant cooperativity effect, which was studied in detail and could be related with several structural and spectroscopic parameters. Infrared spectra of the pure solid compound at low temperatures in both amorphous and crystalline states were also studied and interpreted.
Fil: Gomez Zavaglia, Andrea. Universidad de Coimbra; Portugal. Provincia de Buenos Aires. Gobernación. Comisión de Investigaciones Científicas. Centro de Investigación y Desarrollo en Criotecnología de Alimentos. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigación y Desarrollo en Criotecnología de Alimentos. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Centro de Investigación y Desarrollo en Criotecnología de Alimentos; Argentina
Fil: Fausto, Rui. Universidad de Coimbra; Portugal - Materia
-
Pyrrole
Matrix isolation
Aggregation - Nivel de accesibilidad
- acceso abierto
- Condiciones de uso
- https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
- Repositorio
- Institución
- Consejo Nacional de Investigaciones Científicas y Técnicas
- OAI Identificador
- oai:ri.conicet.gov.ar:11336/151924
Ver los metadatos del registro completo
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Self-aggregation in pyrrole: Matrix isolation, solid state infrared spectroscopy, and DFT studyGomez Zavaglia, AndreaFausto, RuiPyrroleMatrix isolationAggregationhttps://purl.org/becyt/ford/2.11https://purl.org/becyt/ford/2Pyrrole (C4H5N) was embedded in low-temperature solid inert matrixes (argon, xenon; T = 9 K.) and both the monomer and low-order aggregates characterized by FTIR spectroscopy. The spectroscopic studies were complemented by extensive theoretical [DFT(B3LYP)/6-311++G(d,p)] structural and vibrational studies carried out for the monomer and their self-aggregates (up to four units). The calculated spectrum for monomeric pyrrole fits well those obtained immediately after deposition (at 9 K) of diluted matrixes, which can be prepared keeping the compound at low temperature before deposition and using low fluxes of the sublimate. Annealing of the matrixes to higher temperatures or increasing of the gaseous flux during deposition leads to aggregation, which can be easily recognized spectroscopically. On the basis of the theoretically predicted spectra for the monomer, dimer, trimers, and tetramers of pyrrole, assignments were proposed for the experimentally observed bands. It was also found that the formation of the hydrogen-bonded clusters shows a significant cooperativity effect, which was studied in detail and could be related with several structural and spectroscopic parameters. Infrared spectra of the pure solid compound at low temperatures in both amorphous and crystalline states were also studied and interpreted.Fil: Gomez Zavaglia, Andrea. Universidad de Coimbra; Portugal. Provincia de Buenos Aires. Gobernación. Comisión de Investigaciones Científicas. Centro de Investigación y Desarrollo en Criotecnología de Alimentos. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigación y Desarrollo en Criotecnología de Alimentos. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Centro de Investigación y Desarrollo en Criotecnología de Alimentos; ArgentinaFil: Fausto, Rui. Universidad de Coimbra; PortugalAmerican Chemical Society2004-08info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/151924Gomez Zavaglia, Andrea; Fausto, Rui; Self-aggregation in pyrrole: Matrix isolation, solid state infrared spectroscopy, and DFT study; American Chemical Society; Journal of Physical Chemistry A; 108; 34; 8-2004; 6953-69671089-56391463-9084CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1021/jp048118finfo:eu-repo/semantics/altIdentifier/url/https://pubs.acs.org/doi/10.1021/jp048118finfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T09:36:39Zoai:ri.conicet.gov.ar:11336/151924instacron: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:34982025-09-29 09:36:39.895CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse |
dc.title.none.fl_str_mv |
Self-aggregation in pyrrole: Matrix isolation, solid state infrared spectroscopy, and DFT study |
title |
Self-aggregation in pyrrole: Matrix isolation, solid state infrared spectroscopy, and DFT study |
spellingShingle |
Self-aggregation in pyrrole: Matrix isolation, solid state infrared spectroscopy, and DFT study Gomez Zavaglia, Andrea Pyrrole Matrix isolation Aggregation |
title_short |
Self-aggregation in pyrrole: Matrix isolation, solid state infrared spectroscopy, and DFT study |
title_full |
Self-aggregation in pyrrole: Matrix isolation, solid state infrared spectroscopy, and DFT study |
title_fullStr |
Self-aggregation in pyrrole: Matrix isolation, solid state infrared spectroscopy, and DFT study |
title_full_unstemmed |
Self-aggregation in pyrrole: Matrix isolation, solid state infrared spectroscopy, and DFT study |
title_sort |
Self-aggregation in pyrrole: Matrix isolation, solid state infrared spectroscopy, and DFT study |
dc.creator.none.fl_str_mv |
Gomez Zavaglia, Andrea Fausto, Rui |
author |
Gomez Zavaglia, Andrea |
author_facet |
Gomez Zavaglia, Andrea Fausto, Rui |
author_role |
author |
author2 |
Fausto, Rui |
author2_role |
author |
dc.subject.none.fl_str_mv |
Pyrrole Matrix isolation Aggregation |
topic |
Pyrrole Matrix isolation Aggregation |
purl_subject.fl_str_mv |
https://purl.org/becyt/ford/2.11 https://purl.org/becyt/ford/2 |
dc.description.none.fl_txt_mv |
Pyrrole (C4H5N) was embedded in low-temperature solid inert matrixes (argon, xenon; T = 9 K.) and both the monomer and low-order aggregates characterized by FTIR spectroscopy. The spectroscopic studies were complemented by extensive theoretical [DFT(B3LYP)/6-311++G(d,p)] structural and vibrational studies carried out for the monomer and their self-aggregates (up to four units). The calculated spectrum for monomeric pyrrole fits well those obtained immediately after deposition (at 9 K) of diluted matrixes, which can be prepared keeping the compound at low temperature before deposition and using low fluxes of the sublimate. Annealing of the matrixes to higher temperatures or increasing of the gaseous flux during deposition leads to aggregation, which can be easily recognized spectroscopically. On the basis of the theoretically predicted spectra for the monomer, dimer, trimers, and tetramers of pyrrole, assignments were proposed for the experimentally observed bands. It was also found that the formation of the hydrogen-bonded clusters shows a significant cooperativity effect, which was studied in detail and could be related with several structural and spectroscopic parameters. Infrared spectra of the pure solid compound at low temperatures in both amorphous and crystalline states were also studied and interpreted. Fil: Gomez Zavaglia, Andrea. Universidad de Coimbra; Portugal. Provincia de Buenos Aires. Gobernación. Comisión de Investigaciones Científicas. Centro de Investigación y Desarrollo en Criotecnología de Alimentos. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigación y Desarrollo en Criotecnología de Alimentos. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Centro de Investigación y Desarrollo en Criotecnología de Alimentos; Argentina Fil: Fausto, Rui. Universidad de Coimbra; Portugal |
description |
Pyrrole (C4H5N) was embedded in low-temperature solid inert matrixes (argon, xenon; T = 9 K.) and both the monomer and low-order aggregates characterized by FTIR spectroscopy. The spectroscopic studies were complemented by extensive theoretical [DFT(B3LYP)/6-311++G(d,p)] structural and vibrational studies carried out for the monomer and their self-aggregates (up to four units). The calculated spectrum for monomeric pyrrole fits well those obtained immediately after deposition (at 9 K) of diluted matrixes, which can be prepared keeping the compound at low temperature before deposition and using low fluxes of the sublimate. Annealing of the matrixes to higher temperatures or increasing of the gaseous flux during deposition leads to aggregation, which can be easily recognized spectroscopically. On the basis of the theoretically predicted spectra for the monomer, dimer, trimers, and tetramers of pyrrole, assignments were proposed for the experimentally observed bands. It was also found that the formation of the hydrogen-bonded clusters shows a significant cooperativity effect, which was studied in detail and could be related with several structural and spectroscopic parameters. Infrared spectra of the pure solid compound at low temperatures in both amorphous and crystalline states were also studied and interpreted. |
publishDate |
2004 |
dc.date.none.fl_str_mv |
2004-08 |
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/11336/151924 Gomez Zavaglia, Andrea; Fausto, Rui; Self-aggregation in pyrrole: Matrix isolation, solid state infrared spectroscopy, and DFT study; American Chemical Society; Journal of Physical Chemistry A; 108; 34; 8-2004; 6953-6967 1089-5639 1463-9084 CONICET Digital CONICET |
url |
http://hdl.handle.net/11336/151924 |
identifier_str_mv |
Gomez Zavaglia, Andrea; Fausto, Rui; Self-aggregation in pyrrole: Matrix isolation, solid state infrared spectroscopy, and DFT study; American Chemical Society; Journal of Physical Chemistry A; 108; 34; 8-2004; 6953-6967 1089-5639 1463-9084 CONICET Digital CONICET |
dc.language.none.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
info:eu-repo/semantics/altIdentifier/doi/10.1021/jp048118f info:eu-repo/semantics/altIdentifier/url/https://pubs.acs.org/doi/10.1021/jp048118f |
dc.rights.none.fl_str_mv |
info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ |
eu_rights_str_mv |
openAccess |
rights_invalid_str_mv |
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ |
dc.format.none.fl_str_mv |
application/pdf application/pdf |
dc.publisher.none.fl_str_mv |
American Chemical Society |
publisher.none.fl_str_mv |
American Chemical Society |
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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1844613151816941568 |
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13.070432 |