Photophysical properties of the photosensitizer [Ru(bpy)2(5-CNphen)]2+ and intramolecular quenching by complexation of Cu(II)

Autores
Mellace, María G.; Fagalde, Florencia; Katz, Néstor Eduardo; Hester, H.; Schmehl, R.
Año de publicación
2006
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The lifetime of the 3MLCT emitting state of [Ru(bpy)2(5-CNphen)]2+ (bpy = 2,2′-bipyridine, 5-CNphen = 5-cyano-1,10-phenanthroline) has been determined in CH3CN by flash photolysis and TCSPC techniques. The obtained value, τ = 2.2 μs, points to its potential use as a photosensitizer in molecular devices. The transient spectrum shows that this excited state can be formulated as a metal-to-ligand charge transfer state. Static and dynamic quenching of the complex luminescence by Cu2+ ions is observed. The static and dynamic components were evaluated by measuring emission intensities and lifetimes at different [Cu2+]. The combined quenching results point to a strong ground state complexation of Cu2+ (Keq = 7500 M-1 for 1:1 complex) with the nitrile group of 5-CNphen. At high [Cu2+], a short-lived component of the decay has been detected, with ket = 4.0 × 109 s-1. This value is compared to the electron transfer rate constant in the encounter complex of the bimolecular quenching, which was obtained from the dynamic quenching rate constant. © 2005 Elsevier B.V. All rights reserved.
Fil: Mellace, María G.. Universidad Nacional de Tucumán. Facultad de Bioquímica, Química y Farmacia. Instituto de Química Física; Argentina
Fil: Fagalde, Florencia. Universidad Nacional de Tucumán. Facultad de Bioquímica, Química y Farmacia. Instituto de Química Física; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán. Instituto de Química del Noroeste. Universidad Nacional de Tucumán. Facultad de Bioquímica, Química y Farmacia. Instituto de Química del Noroeste; Argentina
Fil: Katz, Néstor Eduardo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán. Instituto de Química del Noroeste. Universidad Nacional de Tucumán. Facultad de Bioquímica, Química y Farmacia. Instituto de Química del Noroeste; Argentina. Universidad Nacional de Tucumán. Facultad de Bioquímica, Química y Farmacia. Instituto de Química Inorgánica; Argentina
Fil: Hester, H.. University of Tulane; Estados Unidos
Fil: Schmehl, R.. University of Tulane; Estados Unidos
Materia
INTRAMOLECULAR PHOTOINDUCED ELECTRON TRANSFER
RUTHENIUM COMPLEX PHOTOPHYSICS
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
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CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/100865
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/100865
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Photophysical properties of the photosensitizer [Ru(bpy)2(5-CNphen)]2+ and intramolecular quenching by complexation of Cu(II)Mellace, María G.Fagalde, FlorenciaKatz, Néstor EduardoHester, H.Schmehl, R.INTRAMOLECULAR PHOTOINDUCED ELECTRON TRANSFERRUTHENIUM COMPLEX PHOTOPHYSICShttps://purl.org/becyt/ford/1.4https://purl.org/becyt/ford/1The lifetime of the 3MLCT emitting state of [Ru(bpy)2(5-CNphen)]2+ (bpy = 2,2′-bipyridine, 5-CNphen = 5-cyano-1,10-phenanthroline) has been determined in CH3CN by flash photolysis and TCSPC techniques. The obtained value, τ = 2.2 μs, points to its potential use as a photosensitizer in molecular devices. The transient spectrum shows that this excited state can be formulated as a metal-to-ligand charge transfer state. Static and dynamic quenching of the complex luminescence by Cu2+ ions is observed. The static and dynamic components were evaluated by measuring emission intensities and lifetimes at different [Cu2+]. The combined quenching results point to a strong ground state complexation of Cu2+ (Keq = 7500 M-1 for 1:1 complex) with the nitrile group of 5-CNphen. At high [Cu2+], a short-lived component of the decay has been detected, with ket = 4.0 × 109 s-1. This value is compared to the electron transfer rate constant in the encounter complex of the bimolecular quenching, which was obtained from the dynamic quenching rate constant. © 2005 Elsevier B.V. All rights reserved.Fil: Mellace, María G.. Universidad Nacional de Tucumán. Facultad de Bioquímica, Química y Farmacia. Instituto de Química Física; ArgentinaFil: Fagalde, Florencia. Universidad Nacional de Tucumán. Facultad de Bioquímica, Química y Farmacia. Instituto de Química Física; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán. Instituto de Química del Noroeste. Universidad Nacional de Tucumán. Facultad de Bioquímica, Química y Farmacia. Instituto de Química del Noroeste; ArgentinaFil: Katz, Néstor Eduardo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán. Instituto de Química del Noroeste. Universidad Nacional de Tucumán. Facultad de Bioquímica, Química y Farmacia. Instituto de Química del Noroeste; Argentina. Universidad Nacional de Tucumán. Facultad de Bioquímica, Química y Farmacia. Instituto de Química Inorgánica; ArgentinaFil: Hester, H.. University of Tulane; Estados UnidosFil: Schmehl, R.. University of Tulane; Estados UnidosElsevier Science Sa2006-07info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/100865Mellace, María G.; Fagalde, Florencia; Katz, Néstor Eduardo; Hester, H.; Schmehl, R.; Photophysical properties of the photosensitizer [Ru(bpy)2(5-CNphen)]2+ and intramolecular quenching by complexation of Cu(II); Elsevier Science Sa; Journal of Photochemistry and Photobiology A: Chemistry; 181; 1; 7-2006; 28-321010-6030CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1016/j.jphotochem.2005.10.022info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/abs/pii/S1010603005005095?via%3Dihubinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T10:12:28Zoai:ri.conicet.gov.ar:11336/100865instacron: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 10:12:28.299CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Photophysical properties of the photosensitizer [Ru(bpy)2(5-CNphen)]2+ and intramolecular quenching by complexation of Cu(II)
title Photophysical properties of the photosensitizer [Ru(bpy)2(5-CNphen)]2+ and intramolecular quenching by complexation of Cu(II)
spellingShingle Photophysical properties of the photosensitizer [Ru(bpy)2(5-CNphen)]2+ and intramolecular quenching by complexation of Cu(II)
Mellace, María G.
INTRAMOLECULAR PHOTOINDUCED ELECTRON TRANSFER
RUTHENIUM COMPLEX PHOTOPHYSICS
title_short Photophysical properties of the photosensitizer [Ru(bpy)2(5-CNphen)]2+ and intramolecular quenching by complexation of Cu(II)
title_full Photophysical properties of the photosensitizer [Ru(bpy)2(5-CNphen)]2+ and intramolecular quenching by complexation of Cu(II)
title_fullStr Photophysical properties of the photosensitizer [Ru(bpy)2(5-CNphen)]2+ and intramolecular quenching by complexation of Cu(II)
title_full_unstemmed Photophysical properties of the photosensitizer [Ru(bpy)2(5-CNphen)]2+ and intramolecular quenching by complexation of Cu(II)
title_sort Photophysical properties of the photosensitizer [Ru(bpy)2(5-CNphen)]2+ and intramolecular quenching by complexation of Cu(II)
dc.creator.none.fl_str_mv Mellace, María G.
Fagalde, Florencia
Katz, Néstor Eduardo
Hester, H.
Schmehl, R.
author Mellace, María G.
author_facet Mellace, María G.
Fagalde, Florencia
Katz, Néstor Eduardo
Hester, H.
Schmehl, R.
author_role author
author2 Fagalde, Florencia
Katz, Néstor Eduardo
Hester, H.
Schmehl, R.
author2_role author
author
author
author
dc.subject.none.fl_str_mv INTRAMOLECULAR PHOTOINDUCED ELECTRON TRANSFER
RUTHENIUM COMPLEX PHOTOPHYSICS
topic INTRAMOLECULAR PHOTOINDUCED ELECTRON TRANSFER
RUTHENIUM COMPLEX PHOTOPHYSICS
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.4
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv The lifetime of the 3MLCT emitting state of [Ru(bpy)2(5-CNphen)]2+ (bpy = 2,2′-bipyridine, 5-CNphen = 5-cyano-1,10-phenanthroline) has been determined in CH3CN by flash photolysis and TCSPC techniques. The obtained value, τ = 2.2 μs, points to its potential use as a photosensitizer in molecular devices. The transient spectrum shows that this excited state can be formulated as a metal-to-ligand charge transfer state. Static and dynamic quenching of the complex luminescence by Cu2+ ions is observed. The static and dynamic components were evaluated by measuring emission intensities and lifetimes at different [Cu2+]. The combined quenching results point to a strong ground state complexation of Cu2+ (Keq = 7500 M-1 for 1:1 complex) with the nitrile group of 5-CNphen. At high [Cu2+], a short-lived component of the decay has been detected, with ket = 4.0 × 109 s-1. This value is compared to the electron transfer rate constant in the encounter complex of the bimolecular quenching, which was obtained from the dynamic quenching rate constant. © 2005 Elsevier B.V. All rights reserved.
Fil: Mellace, María G.. Universidad Nacional de Tucumán. Facultad de Bioquímica, Química y Farmacia. Instituto de Química Física; Argentina
Fil: Fagalde, Florencia. Universidad Nacional de Tucumán. Facultad de Bioquímica, Química y Farmacia. Instituto de Química Física; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán. Instituto de Química del Noroeste. Universidad Nacional de Tucumán. Facultad de Bioquímica, Química y Farmacia. Instituto de Química del Noroeste; Argentina
Fil: Katz, Néstor Eduardo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán. Instituto de Química del Noroeste. Universidad Nacional de Tucumán. Facultad de Bioquímica, Química y Farmacia. Instituto de Química del Noroeste; Argentina. Universidad Nacional de Tucumán. Facultad de Bioquímica, Química y Farmacia. Instituto de Química Inorgánica; Argentina
Fil: Hester, H.. University of Tulane; Estados Unidos
Fil: Schmehl, R.. University of Tulane; Estados Unidos
description The lifetime of the 3MLCT emitting state of [Ru(bpy)2(5-CNphen)]2+ (bpy = 2,2′-bipyridine, 5-CNphen = 5-cyano-1,10-phenanthroline) has been determined in CH3CN by flash photolysis and TCSPC techniques. The obtained value, τ = 2.2 μs, points to its potential use as a photosensitizer in molecular devices. The transient spectrum shows that this excited state can be formulated as a metal-to-ligand charge transfer state. Static and dynamic quenching of the complex luminescence by Cu2+ ions is observed. The static and dynamic components were evaluated by measuring emission intensities and lifetimes at different [Cu2+]. The combined quenching results point to a strong ground state complexation of Cu2+ (Keq = 7500 M-1 for 1:1 complex) with the nitrile group of 5-CNphen. At high [Cu2+], a short-lived component of the decay has been detected, with ket = 4.0 × 109 s-1. This value is compared to the electron transfer rate constant in the encounter complex of the bimolecular quenching, which was obtained from the dynamic quenching rate constant. © 2005 Elsevier B.V. All rights reserved.
publishDate 2006
dc.date.none.fl_str_mv 2006-07
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/11336/100865
Mellace, María G.; Fagalde, Florencia; Katz, Néstor Eduardo; Hester, H.; Schmehl, R.; Photophysical properties of the photosensitizer [Ru(bpy)2(5-CNphen)]2+ and intramolecular quenching by complexation of Cu(II); Elsevier Science Sa; Journal of Photochemistry and Photobiology A: Chemistry; 181; 1; 7-2006; 28-32
1010-6030
CONICET Digital
CONICET
url http://hdl.handle.net/11336/100865
identifier_str_mv Mellace, María G.; Fagalde, Florencia; Katz, Néstor Eduardo; Hester, H.; Schmehl, R.; Photophysical properties of the photosensitizer [Ru(bpy)2(5-CNphen)]2+ and intramolecular quenching by complexation of Cu(II); Elsevier Science Sa; Journal of Photochemistry and Photobiology A: Chemistry; 181; 1; 7-2006; 28-32
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.2005.10.022
info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/abs/pii/S1010603005005095?via%3Dihub
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
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
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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score 13.070432

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