The effect of PAMAM dendrimers on the excited states of little-explored xanthene dyes: In search of eco-friendly photoinitiating systems

Autores
Militello, María Paula; Porcal, Gabriela Valeria; Bertolotti, Sonia Graciela; Previtali, Carlos Mario; Arbeloa, Ernesto Maximiliano
Año de publicación
2023
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
A complete photophysical and photochemical study on the little explored xanthene dyes 2´,7´-dichlorofluorescein; 4, 5, 6, 7- tetrachlorofluorescein; 4´, 5´-dibromofluorescein and 4´, 5´-diiodofluorescein was carried out in aqueous solution. The effect of three PAMAM dendrimers of low generations (G0, G1 and G3) on their excited states was also evaluated. Absorption and fluorescence measurements showed that although the ground and singlet-excited states of the dyes interact weakly with dendrimers, the binding constants obtained correlated with dendrimer size. The triplet-excited states of the dyes were analyzed by laser flash photolysis even for chlorinated ones; which, to the best of our knowledge, had not been characterized until now. Chlorinated fluoresceins showed triplet quantum yields in the order of 0.10, indicating that the intersystem crossing is not a negligible process. Efficient electron transfer reactions were observed between amino moieties of PAMAM and the triplet states of the dyes. The triplet quenching rate constants also correlated with dendrimer size and the semi-reduced species of the dyes were characterized by their transient spectra. Radical formation efficiencies similar to those obtained with a typical tertiary amine were estimated, so the present results suggest that these dye/dendrimer couples might be promising as photoinitiating systems for polymerizations with low ecological impact.
Fil: Militello, María Paula. 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; Argentina
Fil: Porcal, Gabriela Valeria. 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; Argentina
Fil: Bertolotti, Sonia Graciela. 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; Argentina
Fil: Previtali, Carlos Mario. 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; Argentina
Fil: Arbeloa, Ernesto Maximiliano. 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; Argentina
Materia
PHOTOPHYSICS
PAMAM DENDRIMERS
XANTHENIC DYES
EXCITED STATES
TIME-RESOLVED SPECTROSCOPY
Nivel de accesibilidad
acceso embargado
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:11336/222490
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/222490
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling The effect of PAMAM dendrimers on the excited states of little-explored xanthene dyes: In search of eco-friendly photoinitiating systemsMilitello, María PaulaPorcal, Gabriela ValeriaBertolotti, Sonia GracielaPrevitali, Carlos MarioArbeloa, Ernesto MaximilianoPHOTOPHYSICSPAMAM DENDRIMERSXANTHENIC DYESEXCITED STATESTIME-RESOLVED SPECTROSCOPYhttps://purl.org/becyt/ford/1.4https://purl.org/becyt/ford/1A complete photophysical and photochemical study on the little explored xanthene dyes 2´,7´-dichlorofluorescein; 4, 5, 6, 7- tetrachlorofluorescein; 4´, 5´-dibromofluorescein and 4´, 5´-diiodofluorescein was carried out in aqueous solution. The effect of three PAMAM dendrimers of low generations (G0, G1 and G3) on their excited states was also evaluated. Absorption and fluorescence measurements showed that although the ground and singlet-excited states of the dyes interact weakly with dendrimers, the binding constants obtained correlated with dendrimer size. The triplet-excited states of the dyes were analyzed by laser flash photolysis even for chlorinated ones; which, to the best of our knowledge, had not been characterized until now. Chlorinated fluoresceins showed triplet quantum yields in the order of 0.10, indicating that the intersystem crossing is not a negligible process. Efficient electron transfer reactions were observed between amino moieties of PAMAM and the triplet states of the dyes. The triplet quenching rate constants also correlated with dendrimer size and the semi-reduced species of the dyes were characterized by their transient spectra. Radical formation efficiencies similar to those obtained with a typical tertiary amine were estimated, so the present results suggest that these dye/dendrimer couples might be promising as photoinitiating systems for polymerizations with low ecological impact.Fil: Militello, María Paula. 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: Porcal, Gabriela Valeria. 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. 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: Previtali, Carlos Mario. 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: Arbeloa, Ernesto Maximiliano. 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; ArgentinaElsevier Science SA2023-01info:eu-repo/date/embargoEnd/2024-07-05info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/222490Militello, María Paula; Porcal, Gabriela Valeria; Bertolotti, Sonia Graciela; Previtali, Carlos Mario; Arbeloa, Ernesto Maximiliano; The effect of PAMAM dendrimers on the excited states of little-explored xanthene dyes: In search of eco-friendly photoinitiating systems; Elsevier Science SA; Journal of Photochemistry and Photobiology A: Chemistry; 434; 1-2023; 114234-1142421010-6030CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://linkinghub.elsevier.com/retrieve/pii/S1010603022004579info:eu-repo/semantics/embargoedAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-03T09:47:03Zoai:ri.conicet.gov.ar:11336/222490instacron: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:34982025-09-03 09:47:03.664CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv The effect of PAMAM dendrimers on the excited states of little-explored xanthene dyes: In search of eco-friendly photoinitiating systems
title The effect of PAMAM dendrimers on the excited states of little-explored xanthene dyes: In search of eco-friendly photoinitiating systems
spellingShingle The effect of PAMAM dendrimers on the excited states of little-explored xanthene dyes: In search of eco-friendly photoinitiating systems
Militello, María Paula
PHOTOPHYSICS
PAMAM DENDRIMERS
XANTHENIC DYES
EXCITED STATES
TIME-RESOLVED SPECTROSCOPY
title_short The effect of PAMAM dendrimers on the excited states of little-explored xanthene dyes: In search of eco-friendly photoinitiating systems
title_full The effect of PAMAM dendrimers on the excited states of little-explored xanthene dyes: In search of eco-friendly photoinitiating systems
title_fullStr The effect of PAMAM dendrimers on the excited states of little-explored xanthene dyes: In search of eco-friendly photoinitiating systems
title_full_unstemmed The effect of PAMAM dendrimers on the excited states of little-explored xanthene dyes: In search of eco-friendly photoinitiating systems
title_sort The effect of PAMAM dendrimers on the excited states of little-explored xanthene dyes: In search of eco-friendly photoinitiating systems
dc.creator.none.fl_str_mv Militello, María Paula
Porcal, Gabriela Valeria
Bertolotti, Sonia Graciela
Previtali, Carlos Mario
Arbeloa, Ernesto Maximiliano
author Militello, María Paula
author_facet Militello, María Paula
Porcal, Gabriela Valeria
Bertolotti, Sonia Graciela
Previtali, Carlos Mario
Arbeloa, Ernesto Maximiliano
author_role author
author2 Porcal, Gabriela Valeria
Bertolotti, Sonia Graciela
Previtali, Carlos Mario
Arbeloa, Ernesto Maximiliano
author2_role author
author
author
author
dc.subject.none.fl_str_mv PHOTOPHYSICS
PAMAM DENDRIMERS
XANTHENIC DYES
EXCITED STATES
TIME-RESOLVED SPECTROSCOPY
topic PHOTOPHYSICS
PAMAM DENDRIMERS
XANTHENIC DYES
EXCITED STATES
TIME-RESOLVED SPECTROSCOPY
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.4
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv A complete photophysical and photochemical study on the little explored xanthene dyes 2´,7´-dichlorofluorescein; 4, 5, 6, 7- tetrachlorofluorescein; 4´, 5´-dibromofluorescein and 4´, 5´-diiodofluorescein was carried out in aqueous solution. The effect of three PAMAM dendrimers of low generations (G0, G1 and G3) on their excited states was also evaluated. Absorption and fluorescence measurements showed that although the ground and singlet-excited states of the dyes interact weakly with dendrimers, the binding constants obtained correlated with dendrimer size. The triplet-excited states of the dyes were analyzed by laser flash photolysis even for chlorinated ones; which, to the best of our knowledge, had not been characterized until now. Chlorinated fluoresceins showed triplet quantum yields in the order of 0.10, indicating that the intersystem crossing is not a negligible process. Efficient electron transfer reactions were observed between amino moieties of PAMAM and the triplet states of the dyes. The triplet quenching rate constants also correlated with dendrimer size and the semi-reduced species of the dyes were characterized by their transient spectra. Radical formation efficiencies similar to those obtained with a typical tertiary amine were estimated, so the present results suggest that these dye/dendrimer couples might be promising as photoinitiating systems for polymerizations with low ecological impact.
Fil: Militello, María Paula. 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; Argentina
Fil: Porcal, Gabriela Valeria. 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; Argentina
Fil: Bertolotti, Sonia Graciela. 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; Argentina
Fil: Previtali, Carlos Mario. 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; Argentina
Fil: Arbeloa, Ernesto Maximiliano. 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; Argentina
description A complete photophysical and photochemical study on the little explored xanthene dyes 2´,7´-dichlorofluorescein; 4, 5, 6, 7- tetrachlorofluorescein; 4´, 5´-dibromofluorescein and 4´, 5´-diiodofluorescein was carried out in aqueous solution. The effect of three PAMAM dendrimers of low generations (G0, G1 and G3) on their excited states was also evaluated. Absorption and fluorescence measurements showed that although the ground and singlet-excited states of the dyes interact weakly with dendrimers, the binding constants obtained correlated with dendrimer size. The triplet-excited states of the dyes were analyzed by laser flash photolysis even for chlorinated ones; which, to the best of our knowledge, had not been characterized until now. Chlorinated fluoresceins showed triplet quantum yields in the order of 0.10, indicating that the intersystem crossing is not a negligible process. Efficient electron transfer reactions were observed between amino moieties of PAMAM and the triplet states of the dyes. The triplet quenching rate constants also correlated with dendrimer size and the semi-reduced species of the dyes were characterized by their transient spectra. Radical formation efficiencies similar to those obtained with a typical tertiary amine were estimated, so the present results suggest that these dye/dendrimer couples might be promising as photoinitiating systems for polymerizations with low ecological impact.
publishDate 2023
dc.date.none.fl_str_mv 2023-01
info:eu-repo/date/embargoEnd/2024-07-05
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/11336/222490
Militello, María Paula; Porcal, Gabriela Valeria; Bertolotti, Sonia Graciela; Previtali, Carlos Mario; Arbeloa, Ernesto Maximiliano; The effect of PAMAM dendrimers on the excited states of little-explored xanthene dyes: In search of eco-friendly photoinitiating systems; Elsevier Science SA; Journal of Photochemistry and Photobiology A: Chemistry; 434; 1-2023; 114234-114242
1010-6030
CONICET Digital
CONICET
url http://hdl.handle.net/11336/222490
identifier_str_mv Militello, María Paula; Porcal, Gabriela Valeria; Bertolotti, Sonia Graciela; Previtali, Carlos Mario; Arbeloa, Ernesto Maximiliano; The effect of PAMAM dendrimers on the excited states of little-explored xanthene dyes: In search of eco-friendly photoinitiating systems; Elsevier Science SA; Journal of Photochemistry and Photobiology A: Chemistry; 434; 1-2023; 114234-114242
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/url/https://linkinghub.elsevier.com/retrieve/pii/S1010603022004579
dc.rights.none.fl_str_mv info:eu-repo/semantics/embargoedAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv embargoedAccess
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
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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