Phloxine B as a probe for entrapment in microcrystalline cellulose

Autores
Duarte, Paulo; Ferreira, Diana P.; Machado, Isabel Ferreira; Ferreira, Luís Filipe Vieira; Rodriguez, Hernan Bernardo; San Roman, Enrique Arnoldo
Año de publicación
2012
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The photophysical behaviour of phloxine B adsorbed onto microcrystalline cellulose was evaluated by reflectance spectroscopy and laser induced time-resolved luminescence in the picosecond-nanosecond and microsecond- millisecond ranges. Analysis of the absorption spectral changes with concentration points to a small tendency of the dye to aggregate in the range of concentrations under study. Prompt fluorescence, phosphorescence and delayed fluorescence spectral decays were measured at room temperature and 77 K, without the need of sample degassing because cellulose protects triplet states from oxygen quenching. In all cases, spectral changes with time and lifetime distribution analysis were consistent with the dye coexisting in two different environments: dyes tightly entrapped between polymer chains in crystalline regions of cellulose showed longer fluorescence and phosphorescence lifetimes and more energetic triplet states, while dyes adsorbed in more amorphous regions of the support showed shorter lifetimes and less energetic triplet states. This behaviour is discussed in terms of the different dye-support interactions in both kinds of adsorption sites.
Fil: Duarte, Paulo. Centro de Química-Física Molecular; Portugal
Fil: Ferreira, Diana P.. Centro de Química-Física Molecular; Portugal
Fil: Machado, Isabel Ferreira. Universidade Técnica de Lisboa; Portugal
Fil: Ferreira, Luís Filipe Vieira. Centro de Química-física Molecular; Portugal
Fil: Rodriguez, Hernan Bernardo. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Química, Física de los Materiales, Medioambiente y Energía. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Química, Física de los Materiales, Medioambiente y Energía; Argentina
Fil: San Roman, Enrique Arnoldo. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Química, Física de los Materiales, Medioambiente y Energía. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Química, Física de los Materiales, Medioambiente y Energía; Argentina
Materia
PHLOXINE B
HETEROGENEOUS SYSTEMS
PHOSPHORESCENCE
MICROENVIRONMENTAL EFFECTS
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:11336/71323
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/71323
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Phloxine B as a probe for entrapment in microcrystalline celluloseDuarte, PauloFerreira, Diana P.Machado, Isabel FerreiraFerreira, Luís Filipe VieiraRodriguez, Hernan BernardoSan Roman, Enrique ArnoldoPHLOXINE BHETEROGENEOUS SYSTEMSPHOSPHORESCENCEMICROENVIRONMENTAL EFFECTShttps://purl.org/becyt/ford/1.4https://purl.org/becyt/ford/1The photophysical behaviour of phloxine B adsorbed onto microcrystalline cellulose was evaluated by reflectance spectroscopy and laser induced time-resolved luminescence in the picosecond-nanosecond and microsecond- millisecond ranges. Analysis of the absorption spectral changes with concentration points to a small tendency of the dye to aggregate in the range of concentrations under study. Prompt fluorescence, phosphorescence and delayed fluorescence spectral decays were measured at room temperature and 77 K, without the need of sample degassing because cellulose protects triplet states from oxygen quenching. In all cases, spectral changes with time and lifetime distribution analysis were consistent with the dye coexisting in two different environments: dyes tightly entrapped between polymer chains in crystalline regions of cellulose showed longer fluorescence and phosphorescence lifetimes and more energetic triplet states, while dyes adsorbed in more amorphous regions of the support showed shorter lifetimes and less energetic triplet states. This behaviour is discussed in terms of the different dye-support interactions in both kinds of adsorption sites.Fil: Duarte, Paulo. Centro de Química-Física Molecular; PortugalFil: Ferreira, Diana P.. Centro de Química-Física Molecular; PortugalFil: Machado, Isabel Ferreira. Universidade Técnica de Lisboa; PortugalFil: Ferreira, Luís Filipe Vieira. Centro de Química-física Molecular; PortugalFil: Rodriguez, Hernan Bernardo. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Química, Física de los Materiales, Medioambiente y Energía. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Química, Física de los Materiales, Medioambiente y Energía; ArgentinaFil: San Roman, Enrique Arnoldo. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Química, Física de los Materiales, Medioambiente y Energía. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Química, Física de los Materiales, Medioambiente y Energía; ArgentinaMolecular Diversity Preservation International2012-02info: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/11336/71323Duarte, Paulo; Ferreira, Diana P.; Machado, Isabel Ferreira; Ferreira, Luís Filipe Vieira; Rodriguez, Hernan Bernardo; et al.; Phloxine B as a probe for entrapment in microcrystalline cellulose; Molecular Diversity Preservation International; Molecules; 17; 2; 2-2012; 1602-16161420-30491420-3049CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://www.mdpi.com/1420-3049/17/2/1602info:eu-repo/semantics/altIdentifier/doi/10.3390/molecules17021602info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-15T15:22:33Zoai:ri.conicet.gov.ar:11336/71323instacron: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 15:22:34.279CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Phloxine B as a probe for entrapment in microcrystalline cellulose
title Phloxine B as a probe for entrapment in microcrystalline cellulose
spellingShingle Phloxine B as a probe for entrapment in microcrystalline cellulose
Duarte, Paulo
PHLOXINE B
HETEROGENEOUS SYSTEMS
PHOSPHORESCENCE
MICROENVIRONMENTAL EFFECTS
title_short Phloxine B as a probe for entrapment in microcrystalline cellulose
title_full Phloxine B as a probe for entrapment in microcrystalline cellulose
title_fullStr Phloxine B as a probe for entrapment in microcrystalline cellulose
title_full_unstemmed Phloxine B as a probe for entrapment in microcrystalline cellulose
title_sort Phloxine B as a probe for entrapment in microcrystalline cellulose
dc.creator.none.fl_str_mv Duarte, Paulo
Ferreira, Diana P.
Machado, Isabel Ferreira
Ferreira, Luís Filipe Vieira
Rodriguez, Hernan Bernardo
San Roman, Enrique Arnoldo
author Duarte, Paulo
author_facet Duarte, Paulo
Ferreira, Diana P.
Machado, Isabel Ferreira
Ferreira, Luís Filipe Vieira
Rodriguez, Hernan Bernardo
San Roman, Enrique Arnoldo
author_role author
author2 Ferreira, Diana P.
Machado, Isabel Ferreira
Ferreira, Luís Filipe Vieira
Rodriguez, Hernan Bernardo
San Roman, Enrique Arnoldo
author2_role author
author
author
author
author
dc.subject.none.fl_str_mv PHLOXINE B
HETEROGENEOUS SYSTEMS
PHOSPHORESCENCE
MICROENVIRONMENTAL EFFECTS
topic PHLOXINE B
HETEROGENEOUS SYSTEMS
PHOSPHORESCENCE
MICROENVIRONMENTAL EFFECTS
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 behaviour of phloxine B adsorbed onto microcrystalline cellulose was evaluated by reflectance spectroscopy and laser induced time-resolved luminescence in the picosecond-nanosecond and microsecond- millisecond ranges. Analysis of the absorption spectral changes with concentration points to a small tendency of the dye to aggregate in the range of concentrations under study. Prompt fluorescence, phosphorescence and delayed fluorescence spectral decays were measured at room temperature and 77 K, without the need of sample degassing because cellulose protects triplet states from oxygen quenching. In all cases, spectral changes with time and lifetime distribution analysis were consistent with the dye coexisting in two different environments: dyes tightly entrapped between polymer chains in crystalline regions of cellulose showed longer fluorescence and phosphorescence lifetimes and more energetic triplet states, while dyes adsorbed in more amorphous regions of the support showed shorter lifetimes and less energetic triplet states. This behaviour is discussed in terms of the different dye-support interactions in both kinds of adsorption sites.
Fil: Duarte, Paulo. Centro de Química-Física Molecular; Portugal
Fil: Ferreira, Diana P.. Centro de Química-Física Molecular; Portugal
Fil: Machado, Isabel Ferreira. Universidade Técnica de Lisboa; Portugal
Fil: Ferreira, Luís Filipe Vieira. Centro de Química-física Molecular; Portugal
Fil: Rodriguez, Hernan Bernardo. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Química, Física de los Materiales, Medioambiente y Energía. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Química, Física de los Materiales, Medioambiente y Energía; Argentina
Fil: San Roman, Enrique Arnoldo. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Química, Física de los Materiales, Medioambiente y Energía. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Química, Física de los Materiales, Medioambiente y Energía; Argentina
description The photophysical behaviour of phloxine B adsorbed onto microcrystalline cellulose was evaluated by reflectance spectroscopy and laser induced time-resolved luminescence in the picosecond-nanosecond and microsecond- millisecond ranges. Analysis of the absorption spectral changes with concentration points to a small tendency of the dye to aggregate in the range of concentrations under study. Prompt fluorescence, phosphorescence and delayed fluorescence spectral decays were measured at room temperature and 77 K, without the need of sample degassing because cellulose protects triplet states from oxygen quenching. In all cases, spectral changes with time and lifetime distribution analysis were consistent with the dye coexisting in two different environments: dyes tightly entrapped between polymer chains in crystalline regions of cellulose showed longer fluorescence and phosphorescence lifetimes and more energetic triplet states, while dyes adsorbed in more amorphous regions of the support showed shorter lifetimes and less energetic triplet states. This behaviour is discussed in terms of the different dye-support interactions in both kinds of adsorption sites.
publishDate 2012
dc.date.none.fl_str_mv 2012-02
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/11336/71323
Duarte, Paulo; Ferreira, Diana P.; Machado, Isabel Ferreira; Ferreira, Luís Filipe Vieira; Rodriguez, Hernan Bernardo; et al.; Phloxine B as a probe for entrapment in microcrystalline cellulose; Molecular Diversity Preservation International; Molecules; 17; 2; 2-2012; 1602-1616
1420-3049
1420-3049
CONICET Digital
CONICET
url http://hdl.handle.net/11336/71323
identifier_str_mv Duarte, Paulo; Ferreira, Diana P.; Machado, Isabel Ferreira; Ferreira, Luís Filipe Vieira; Rodriguez, Hernan Bernardo; et al.; Phloxine B as a probe for entrapment in microcrystalline cellulose; Molecular Diversity Preservation International; Molecules; 17; 2; 2-2012; 1602-1616
1420-3049
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://www.mdpi.com/1420-3049/17/2/1602
info:eu-repo/semantics/altIdentifier/doi/10.3390/molecules17021602
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 Molecular Diversity Preservation International
publisher.none.fl_str_mv Molecular Diversity Preservation International
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
_version_ 1846083372905922560
score 13.22299

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