Excited states quenching of phenosafranine dye by electron donors

The quenching of the excited singlet and triplet states of phenosafranine by aromatic amines, methoxybenzenes and triethanolamine was investigated in acetonitrile and methanol. The rate constants for the aromatic quenchers present a typical dependence of an electron transfer process with the one-ele...

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Autores: Broglia, Martin Federico, Bertolotti, Sonia Graciela, Previtali, Carlos Mario
Formato: artículo
Estado:Versión publicada
Fecha de publicación:2005
País:Argentina
Recursos:Consejo Nacional de Investigaciones Científicas y Técnicas
Repositorio:CONICET Digital (CONICET)
Idioma:inglés
OAI Identifier:oai:ri.conicet.gov.ar:11336/115564
Acesso em linha:http://hdl.handle.net/11336/115564
Access Level:acceso abierto
Palavra-chave:DYES
ELECTRON TRANSFER
LASER FLASH PHOTOLYSIS
PHENOSAFRANINE
QUENCHING PROCESS
SEMIREDUCED DYE
https://purl.org/becyt/ford/1.4
https://purl.org/becyt/ford/1
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network_acronym_str AR
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repository_id_str
spelling Excited states quenching of phenosafranine dye by electron donorsBroglia, Martin FedericoBertolotti, Sonia GracielaPrevitali, Carlos MarioDYESELECTRON TRANSFERLASER FLASH PHOTOLYSISPHENOSAFRANINEQUENCHING PROCESSSEMIREDUCED DYEhttps://purl.org/becyt/ford/1.4https://purl.org/becyt/ford/1The quenching of the excited singlet and triplet states of phenosafranine by aromatic amines, methoxybenzenes and triethanolamine was investigated in acetonitrile and methanol. The rate constants for the aromatic quenchers present a typical dependence of an electron transfer process with the one-electron redox potential of the donor. A Rehm-Weller correlation is obtained with the driving force. The fitting parameters are very similar in both solvents. The electron transfer nature of the quenching reaction is further confirmed by the detection of the radical cations of the quenchers and the semireduced form of the dye in laser flash photolysis experiments. The absorption coefficients of the transient species were estimated, and the quantum yield of the charge separation process was determined.Fil: Broglia, Martin Federico. 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; ArgentinaFil: Bertolotti, Sonia Graciela. Universidad Nacional de Río Cuarto. Facultad de Ciencias Exactas Fisicoquímicas y Naturales. Departamento de Química; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Previtali, Carlos Mario. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de Río Cuarto. Facultad de Ciencias Exactas Fisicoquímicas y Naturales. Departamento de Química; ArgentinaElsevier Science Sa2005-03info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/115564Broglia, Martin Federico; Bertolotti, Sonia Graciela; Previtali, Carlos Mario; Excited states quenching of phenosafranine dye by electron donors; Elsevier Science Sa; Journal of Photochemistry and Photobiology A: Chemistry; 170; 3; 3-2005; 261-2651010-6030CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1016/j.jphotochem.2004.08.017info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2024-05-08T14:14:39Zoai:ri.conicet.gov.ar:11336/115564instacron: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:34982024-05-08 14:14:39.693CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Excited states quenching of phenosafranine dye by electron donors
title Excited states quenching of phenosafranine dye by electron donors
spellingShingle Excited states quenching of phenosafranine dye by electron donors
Broglia, Martin Federico
DYES
ELECTRON TRANSFER
LASER FLASH PHOTOLYSIS
PHENOSAFRANINE
QUENCHING PROCESS
SEMIREDUCED DYE
https://purl.org/becyt/ford/1.4
https://purl.org/becyt/ford/1
title_short Excited states quenching of phenosafranine dye by electron donors
title_full Excited states quenching of phenosafranine dye by electron donors
title_fullStr Excited states quenching of phenosafranine dye by electron donors
title_full_unstemmed Excited states quenching of phenosafranine dye by electron donors
title_sort Excited states quenching of phenosafranine dye by electron donors
dc.creator.none.fl_str_mv Broglia, Martin Federico
Bertolotti, Sonia Graciela
Previtali, Carlos Mario
author Broglia, Martin Federico
author_facet Broglia, Martin Federico
Bertolotti, Sonia Graciela
Previtali, Carlos Mario
author_role author
author2 Bertolotti, Sonia Graciela
Previtali, Carlos Mario
author2_role author
author
dc.subject.none.fl_str_mv DYES
ELECTRON TRANSFER
LASER FLASH PHOTOLYSIS
PHENOSAFRANINE
QUENCHING PROCESS
SEMIREDUCED DYE
https://purl.org/becyt/ford/1.4
https://purl.org/becyt/ford/1
topic DYES
ELECTRON TRANSFER
LASER FLASH PHOTOLYSIS
PHENOSAFRANINE
QUENCHING PROCESS
SEMIREDUCED DYE
https://purl.org/becyt/ford/1.4
https://purl.org/becyt/ford/1
description The quenching of the excited singlet and triplet states of phenosafranine by aromatic amines, methoxybenzenes and triethanolamine was investigated in acetonitrile and methanol. The rate constants for the aromatic quenchers present a typical dependence of an electron transfer process with the one-electron redox potential of the donor. A Rehm-Weller correlation is obtained with the driving force. The fitting parameters are very similar in both solvents. The electron transfer nature of the quenching reaction is further confirmed by the detection of the radical cations of the quenchers and the semireduced form of the dye in laser flash photolysis experiments. The absorption coefficients of the transient species were estimated, and the quantum yield of the charge separation process was determined.
publishDate 2005
dc.date.none.fl_str_mv 2005-03
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/11336/115564
Broglia, Martin Federico; Bertolotti, Sonia Graciela; Previtali, Carlos Mario; Excited states quenching of phenosafranine dye by electron donors; Elsevier Science Sa; Journal of Photochemistry and Photobiology A: Chemistry; 170; 3; 3-2005; 261-265
1010-6030
CONICET Digital
CONICET
url http://hdl.handle.net/11336/115564
identifier_str_mv Broglia, Martin Federico; Bertolotti, Sonia Graciela; Previtali, Carlos Mario; Excited states quenching of phenosafranine dye by electron donors; Elsevier Science Sa; Journal of Photochemistry and Photobiology A: Chemistry; 170; 3; 3-2005; 261-265
1010-6030
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1016/j.jphotochem.2004.08.017
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
application/pdf
dc.publisher.none.fl_str_mv Elsevier Science Sa
publisher.none.fl_str_mv Elsevier Science Sa
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
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
_version_ 1799196096197558272
score 15,198674

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