Rhenium(I) tricarbonyl complexes with 4,4´´-azobis(2,2´-bipyridine)

Autores
Abate, Pedro Oscar; Pourrieux, Gaston; Vergara, Monica Mercedes; Katz, Néstor Eduardo
Año de publicación
2016
Idioma
inglés
Tipo de recurso
documento de conferencia
Estado
versión publicada
Descripción
Rhenium(I) tricarbonyl complexes have interesting optical and electrical properties that can be applied in the design of molecular devices.1 We describe in this work the synthesis and spectroscopic and electrochemical characterization of new Re(I) species of formula: [{Re(CO)3Cl}2L] , 1 and [{Re(CO)3(CH3CN)}2L](PF)6 , 2 , where L = 4,4??-azobis(2,2?-bipiridine, whose structure is shown in Scheme 1. The IR spectrum of complex 2 shows the typical stretching frequencies CO at higher values than those of complex 1, which can be attributed to the competition between CH3CN and the CO groups for the metal electronic density. This effect is consistent with the shift observed in the absorption maxima corresponding to the MLCT d(Re) *(L) bands in the UV-Visible spectra for both species in CH3CN: max = 450 nm for 1 and max = 380 nm for 2. By adding L-cysteine to complex 2 (at pH = 7.5), the lowest-energy MLCT band is displaced to higher energiesmax = 350 nm), thus pointing to a reduction of the azo group. This colour change can be applied for sensing aminoacids. On the other hand, by irradiating complex 2 at ex = 277 nm for 1 hour, the shifts in the UV-visible bands to higher energies disclose a trans-cis isomerization process, sensitized by a low-energy MLCT state.In conclusion, complex 2 can be used as a molecular switch for sensing biologically relevant compounds and as a model for controlling changes of molecular geometry induced by light.
Fil: Abate, Pedro Oscar. 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: Pourrieux, Gaston. 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 Tucuman. Facultad de Bioquímica, Química y Farmacia. Cátedra de Fisicoquímica Iii; Argentina
Fil: Vergara, Monica Mercedes. Universidad Nacional de Tucumán. Facultad de Bioquímica, Química y Farmacia. Instituto de Física; 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
42nd International Conference on Coordination Chemistry
Brest
Francia
The ICCC 2016 Organizing Committee
Materia
RHENIUM
AZOBIS(BIPYRIDINE)
LUMINESCENCE
ISOMERIZATION
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/238268
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/238268
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Rhenium(I) tricarbonyl complexes with 4,4´´-azobis(2,2´-bipyridine)Abate, Pedro OscarPourrieux, GastonVergara, Monica MercedesKatz, Néstor EduardoRHENIUMAZOBIS(BIPYRIDINE)LUMINESCENCEISOMERIZATIONhttps://purl.org/becyt/ford/1.4https://purl.org/becyt/ford/1Rhenium(I) tricarbonyl complexes have interesting optical and electrical properties that can be applied in the design of molecular devices.1 We describe in this work the synthesis and spectroscopic and electrochemical characterization of new Re(I) species of formula: [{Re(CO)3Cl}2L] , 1 and [{Re(CO)3(CH3CN)}2L](PF)6 , 2 , where L = 4,4??-azobis(2,2?-bipiridine, whose structure is shown in Scheme 1. The IR spectrum of complex 2 shows the typical stretching frequencies CO at higher values than those of complex 1, which can be attributed to the competition between CH3CN and the CO groups for the metal electronic density. This effect is consistent with the shift observed in the absorption maxima corresponding to the MLCT d(Re) *(L) bands in the UV-Visible spectra for both species in CH3CN: max = 450 nm for 1 and max = 380 nm for 2. By adding L-cysteine to complex 2 (at pH = 7.5), the lowest-energy MLCT band is displaced to higher energiesmax = 350 nm), thus pointing to a reduction of the azo group. This colour change can be applied for sensing aminoacids. On the other hand, by irradiating complex 2 at ex = 277 nm for 1 hour, the shifts in the UV-visible bands to higher energies disclose a trans-cis isomerization process, sensitized by a low-energy MLCT state.In conclusion, complex 2 can be used as a molecular switch for sensing biologically relevant compounds and as a model for controlling changes of molecular geometry induced by light.Fil: Abate, Pedro Oscar. 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: Pourrieux, Gaston. 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 Tucuman. Facultad de Bioquímica, Química y Farmacia. Cátedra de Fisicoquímica Iii; ArgentinaFil: Vergara, Monica Mercedes. Universidad Nacional de Tucumán. Facultad de Bioquímica, Química y Farmacia. Instituto de Física; 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; Argentina42nd International Conference on Coordination ChemistryBrestFranciaThe ICCC 2016 Organizing CommitteeThe ICCC 2016 Organizing Committee2016info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/conferenceObjectConferenciaBookhttp://purl.org/coar/resource_type/c_5794info:ar-repo/semantics/documentoDeConferenciaapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/238268Rhenium(I) tricarbonyl complexes with 4,4´´-azobis(2,2´-bipyridine); 42nd International Conference on Coordination Chemistry; Brest; Francia; 2016; 138-138CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://iccc2016.sciencesconf.org/conference/iccc2016/pages/Posters_abstract_book_06_8.pdfinfo:eu-repo/semantics/altIdentifier/url/https://iccc2016.sciencesconf.org/Internacionalinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-15T14:46:41Zoai:ri.conicet.gov.ar:11336/238268instacron: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:34982025-10-15 14:46:41.882CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Rhenium(I) tricarbonyl complexes with 4,4´´-azobis(2,2´-bipyridine)
title Rhenium(I) tricarbonyl complexes with 4,4´´-azobis(2,2´-bipyridine)
spellingShingle Rhenium(I) tricarbonyl complexes with 4,4´´-azobis(2,2´-bipyridine)
Abate, Pedro Oscar
RHENIUM
AZOBIS(BIPYRIDINE)
LUMINESCENCE
ISOMERIZATION
title_short Rhenium(I) tricarbonyl complexes with 4,4´´-azobis(2,2´-bipyridine)
title_full Rhenium(I) tricarbonyl complexes with 4,4´´-azobis(2,2´-bipyridine)
title_fullStr Rhenium(I) tricarbonyl complexes with 4,4´´-azobis(2,2´-bipyridine)
title_full_unstemmed Rhenium(I) tricarbonyl complexes with 4,4´´-azobis(2,2´-bipyridine)
title_sort Rhenium(I) tricarbonyl complexes with 4,4´´-azobis(2,2´-bipyridine)
dc.creator.none.fl_str_mv Abate, Pedro Oscar
Pourrieux, Gaston
Vergara, Monica Mercedes
Katz, Néstor Eduardo
author Abate, Pedro Oscar
author_facet Abate, Pedro Oscar
Pourrieux, Gaston
Vergara, Monica Mercedes
Katz, Néstor Eduardo
author_role author
author2 Pourrieux, Gaston
Vergara, Monica Mercedes
Katz, Néstor Eduardo
author2_role author
author
author
dc.subject.none.fl_str_mv RHENIUM
AZOBIS(BIPYRIDINE)
LUMINESCENCE
ISOMERIZATION
topic RHENIUM
AZOBIS(BIPYRIDINE)
LUMINESCENCE
ISOMERIZATION
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.4
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Rhenium(I) tricarbonyl complexes have interesting optical and electrical properties that can be applied in the design of molecular devices.1 We describe in this work the synthesis and spectroscopic and electrochemical characterization of new Re(I) species of formula: [{Re(CO)3Cl}2L] , 1 and [{Re(CO)3(CH3CN)}2L](PF)6 , 2 , where L = 4,4??-azobis(2,2?-bipiridine, whose structure is shown in Scheme 1. The IR spectrum of complex 2 shows the typical stretching frequencies CO at higher values than those of complex 1, which can be attributed to the competition between CH3CN and the CO groups for the metal electronic density. This effect is consistent with the shift observed in the absorption maxima corresponding to the MLCT d(Re) *(L) bands in the UV-Visible spectra for both species in CH3CN: max = 450 nm for 1 and max = 380 nm for 2. By adding L-cysteine to complex 2 (at pH = 7.5), the lowest-energy MLCT band is displaced to higher energiesmax = 350 nm), thus pointing to a reduction of the azo group. This colour change can be applied for sensing aminoacids. On the other hand, by irradiating complex 2 at ex = 277 nm for 1 hour, the shifts in the UV-visible bands to higher energies disclose a trans-cis isomerization process, sensitized by a low-energy MLCT state.In conclusion, complex 2 can be used as a molecular switch for sensing biologically relevant compounds and as a model for controlling changes of molecular geometry induced by light.
Fil: Abate, Pedro Oscar. 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: Pourrieux, Gaston. 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 Tucuman. Facultad de Bioquímica, Química y Farmacia. Cátedra de Fisicoquímica Iii; Argentina
Fil: Vergara, Monica Mercedes. Universidad Nacional de Tucumán. Facultad de Bioquímica, Química y Farmacia. Instituto de Física; 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
42nd International Conference on Coordination Chemistry
Brest
Francia
The ICCC 2016 Organizing Committee
description Rhenium(I) tricarbonyl complexes have interesting optical and electrical properties that can be applied in the design of molecular devices.1 We describe in this work the synthesis and spectroscopic and electrochemical characterization of new Re(I) species of formula: [{Re(CO)3Cl}2L] , 1 and [{Re(CO)3(CH3CN)}2L](PF)6 , 2 , where L = 4,4??-azobis(2,2?-bipiridine, whose structure is shown in Scheme 1. The IR spectrum of complex 2 shows the typical stretching frequencies CO at higher values than those of complex 1, which can be attributed to the competition between CH3CN and the CO groups for the metal electronic density. This effect is consistent with the shift observed in the absorption maxima corresponding to the MLCT d(Re) *(L) bands in the UV-Visible spectra for both species in CH3CN: max = 450 nm for 1 and max = 380 nm for 2. By adding L-cysteine to complex 2 (at pH = 7.5), the lowest-energy MLCT band is displaced to higher energiesmax = 350 nm), thus pointing to a reduction of the azo group. This colour change can be applied for sensing aminoacids. On the other hand, by irradiating complex 2 at ex = 277 nm for 1 hour, the shifts in the UV-visible bands to higher energies disclose a trans-cis isomerization process, sensitized by a low-energy MLCT state.In conclusion, complex 2 can be used as a molecular switch for sensing biologically relevant compounds and as a model for controlling changes of molecular geometry induced by light.
publishDate 2016
dc.date.none.fl_str_mv 2016
dc.type.none.fl_str_mv info:eu-repo/semantics/publishedVersion
info:eu-repo/semantics/conferenceObject
Conferencia
Book
http://purl.org/coar/resource_type/c_5794
info:ar-repo/semantics/documentoDeConferencia
status_str publishedVersion
format conferenceObject
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/238268
Rhenium(I) tricarbonyl complexes with 4,4´´-azobis(2,2´-bipyridine); 42nd International Conference on Coordination Chemistry; Brest; Francia; 2016; 138-138
CONICET Digital
CONICET
url http://hdl.handle.net/11336/238268
identifier_str_mv Rhenium(I) tricarbonyl complexes with 4,4´´-azobis(2,2´-bipyridine); 42nd International Conference on Coordination Chemistry; Brest; Francia; 2016; 138-138
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/https://iccc2016.sciencesconf.org/conference/iccc2016/pages/Posters_abstract_book_06_8.pdf
info:eu-repo/semantics/altIdentifier/url/https://iccc2016.sciencesconf.org/
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.coverage.none.fl_str_mv Internacional
dc.publisher.none.fl_str_mv The ICCC 2016 Organizing Committee
publisher.none.fl_str_mv The ICCC 2016 Organizing Committee
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 13.22299

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