A comparative study on the photophysics and photochemistry of xanthene dyes in the presence of polyamidoamine (PAMAM) dendrimers

Autores
Arbeloa, Ernesto Maximiliano; Previtali, Carlos Mario; Bertolotti, Sonia Graciela
Año de publicación
2018
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The photophysical and photochemical properties of the xanthene dyes Eosin Y, Erythrosin B, and Rose Bengal are evaluated in the presence of amino-terminated polyamidoamine (PAMAM) dendrimers of relatively high generation (G3–G5) in alkaline aqueous solution. UV/Vis absorption and fluorescence spectra of the dyes show bathochromic shifts, which correlate with the size of the dendrimer. Binding constants (Kbind) are calculated from absorption data. The resulting high Kbind values indicate strong interactions between both molecules. Triplet–triplet absorption spectra of the dyes are recorded by laser flash photolysis, and a decrease in the triplet lifetimes is observed in the presence of dendrimers. At the same time, an increase in the absorption of the semireduced form of the dyes is observed. Rate constants for triplet quenching (3kq) and radical quantum yields (ΦR) are obtained. The results are explained by a very efficient electron-transfer process from PAMAM to xanthene dyes for all of the dye/dendrimer couples that are evaluated.
Fil: Arbeloa, Ernesto Maximiliano. Universidad Nacional de Río Cuarto. Facultad de Ciencias Exactas Fisicoquímicas y Naturales. Departamento de Química; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba; Argentina
Fil: Previtali, Carlos Mario. Universidad Nacional de Río Cuarto. Facultad de Ciencias Exactas Fisicoquímicas y Naturales. Departamento de Química; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba; Argentina
Fil: 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. Centro Científico Tecnológico Conicet - Córdoba; Argentina
Materia
DENDRIMERS
DYES/PIGMENTS
PHOTOCHEMISTRY
PHOTOPHYSICS
TIME-RESOLVED SPECTROSCOPY
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:11336/133563
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/133563
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling A comparative study on the photophysics and photochemistry of xanthene dyes in the presence of polyamidoamine (PAMAM) dendrimersArbeloa, Ernesto MaximilianoPrevitali, Carlos MarioBertolotti, Sonia GracielaDENDRIMERSDYES/PIGMENTSPHOTOCHEMISTRYPHOTOPHYSICSTIME-RESOLVED SPECTROSCOPYhttps://purl.org/becyt/ford/1.4https://purl.org/becyt/ford/1The photophysical and photochemical properties of the xanthene dyes Eosin Y, Erythrosin B, and Rose Bengal are evaluated in the presence of amino-terminated polyamidoamine (PAMAM) dendrimers of relatively high generation (G3–G5) in alkaline aqueous solution. UV/Vis absorption and fluorescence spectra of the dyes show bathochromic shifts, which correlate with the size of the dendrimer. Binding constants (Kbind) are calculated from absorption data. The resulting high Kbind values indicate strong interactions between both molecules. Triplet–triplet absorption spectra of the dyes are recorded by laser flash photolysis, and a decrease in the triplet lifetimes is observed in the presence of dendrimers. At the same time, an increase in the absorption of the semireduced form of the dyes is observed. Rate constants for triplet quenching (3kq) and radical quantum yields (ΦR) are obtained. The results are explained by a very efficient electron-transfer process from PAMAM to xanthene dyes for all of the dye/dendrimer couples that are evaluated.Fil: Arbeloa, Ernesto Maximiliano. Universidad Nacional de Río Cuarto. Facultad de Ciencias Exactas Fisicoquímicas y Naturales. Departamento de Química; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba; ArgentinaFil: Previtali, Carlos Mario. Universidad Nacional de Río Cuarto. Facultad de Ciencias Exactas Fisicoquímicas y Naturales. Departamento de Química; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba; 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. Centro Científico Tecnológico Conicet - Córdoba; ArgentinaWiley VCH Verlag2018-04-17info: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/11336/133563Arbeloa, Ernesto Maximiliano; Previtali, Carlos Mario; Bertolotti, Sonia Graciela; A comparative study on the photophysics and photochemistry of xanthene dyes in the presence of polyamidoamine (PAMAM) dendrimers; Wiley VCH Verlag; Chemphyschem; 19; 8; 17-4-2018; 934-9421439-42351439-7641CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/info:eu-repo/semantics/altIdentifier/url/https://chemistry-europe.onlinelibrary.wiley.com/doi/full/10.1002/cphc.201701295info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-10T13:05:05Zoai:ri.conicet.gov.ar:11336/133563instacron: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:34982025-09-10 13:05:05.513CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv A comparative study on the photophysics and photochemistry of xanthene dyes in the presence of polyamidoamine (PAMAM) dendrimers
title A comparative study on the photophysics and photochemistry of xanthene dyes in the presence of polyamidoamine (PAMAM) dendrimers
spellingShingle A comparative study on the photophysics and photochemistry of xanthene dyes in the presence of polyamidoamine (PAMAM) dendrimers
Arbeloa, Ernesto Maximiliano
DENDRIMERS
DYES/PIGMENTS
PHOTOCHEMISTRY
PHOTOPHYSICS
TIME-RESOLVED SPECTROSCOPY
title_short A comparative study on the photophysics and photochemistry of xanthene dyes in the presence of polyamidoamine (PAMAM) dendrimers
title_full A comparative study on the photophysics and photochemistry of xanthene dyes in the presence of polyamidoamine (PAMAM) dendrimers
title_fullStr A comparative study on the photophysics and photochemistry of xanthene dyes in the presence of polyamidoamine (PAMAM) dendrimers
title_full_unstemmed A comparative study on the photophysics and photochemistry of xanthene dyes in the presence of polyamidoamine (PAMAM) dendrimers
title_sort A comparative study on the photophysics and photochemistry of xanthene dyes in the presence of polyamidoamine (PAMAM) dendrimers
dc.creator.none.fl_str_mv Arbeloa, Ernesto Maximiliano
Previtali, Carlos Mario
Bertolotti, Sonia Graciela
author Arbeloa, Ernesto Maximiliano
author_facet Arbeloa, Ernesto Maximiliano
Previtali, Carlos Mario
Bertolotti, Sonia Graciela
author_role author
author2 Previtali, Carlos Mario
Bertolotti, Sonia Graciela
author2_role author
author
dc.subject.none.fl_str_mv DENDRIMERS
DYES/PIGMENTS
PHOTOCHEMISTRY
PHOTOPHYSICS
TIME-RESOLVED SPECTROSCOPY
topic DENDRIMERS
DYES/PIGMENTS
PHOTOCHEMISTRY
PHOTOPHYSICS
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 The photophysical and photochemical properties of the xanthene dyes Eosin Y, Erythrosin B, and Rose Bengal are evaluated in the presence of amino-terminated polyamidoamine (PAMAM) dendrimers of relatively high generation (G3–G5) in alkaline aqueous solution. UV/Vis absorption and fluorescence spectra of the dyes show bathochromic shifts, which correlate with the size of the dendrimer. Binding constants (Kbind) are calculated from absorption data. The resulting high Kbind values indicate strong interactions between both molecules. Triplet–triplet absorption spectra of the dyes are recorded by laser flash photolysis, and a decrease in the triplet lifetimes is observed in the presence of dendrimers. At the same time, an increase in the absorption of the semireduced form of the dyes is observed. Rate constants for triplet quenching (3kq) and radical quantum yields (ΦR) are obtained. The results are explained by a very efficient electron-transfer process from PAMAM to xanthene dyes for all of the dye/dendrimer couples that are evaluated.
Fil: Arbeloa, Ernesto Maximiliano. Universidad Nacional de Río Cuarto. Facultad de Ciencias Exactas Fisicoquímicas y Naturales. Departamento de Química; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba; Argentina
Fil: Previtali, Carlos Mario. Universidad Nacional de Río Cuarto. Facultad de Ciencias Exactas Fisicoquímicas y Naturales. Departamento de Química; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba; Argentina
Fil: 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. Centro Científico Tecnológico Conicet - Córdoba; Argentina
description The photophysical and photochemical properties of the xanthene dyes Eosin Y, Erythrosin B, and Rose Bengal are evaluated in the presence of amino-terminated polyamidoamine (PAMAM) dendrimers of relatively high generation (G3–G5) in alkaline aqueous solution. UV/Vis absorption and fluorescence spectra of the dyes show bathochromic shifts, which correlate with the size of the dendrimer. Binding constants (Kbind) are calculated from absorption data. The resulting high Kbind values indicate strong interactions between both molecules. Triplet–triplet absorption spectra of the dyes are recorded by laser flash photolysis, and a decrease in the triplet lifetimes is observed in the presence of dendrimers. At the same time, an increase in the absorption of the semireduced form of the dyes is observed. Rate constants for triplet quenching (3kq) and radical quantum yields (ΦR) are obtained. The results are explained by a very efficient electron-transfer process from PAMAM to xanthene dyes for all of the dye/dendrimer couples that are evaluated.
publishDate 2018
dc.date.none.fl_str_mv 2018-04-17
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/11336/133563
Arbeloa, Ernesto Maximiliano; Previtali, Carlos Mario; Bertolotti, Sonia Graciela; A comparative study on the photophysics and photochemistry of xanthene dyes in the presence of polyamidoamine (PAMAM) dendrimers; Wiley VCH Verlag; Chemphyschem; 19; 8; 17-4-2018; 934-942
1439-4235
1439-7641
CONICET Digital
CONICET
url http://hdl.handle.net/11336/133563
identifier_str_mv Arbeloa, Ernesto Maximiliano; Previtali, Carlos Mario; Bertolotti, Sonia Graciela; A comparative study on the photophysics and photochemistry of xanthene dyes in the presence of polyamidoamine (PAMAM) dendrimers; Wiley VCH Verlag; Chemphyschem; 19; 8; 17-4-2018; 934-942
1439-4235
1439-7641
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/
info:eu-repo/semantics/altIdentifier/url/https://chemistry-europe.onlinelibrary.wiley.com/doi/full/10.1002/cphc.201701295
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 Wiley VCH Verlag
publisher.none.fl_str_mv Wiley VCH Verlag
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 12.993085

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