Triplet quantum yields in light-scattering powder samples measured by laser-induced optoacoustic spectroscopy (LIOAS)

Mostrar todas las versiones(2)

In recent years, different methods and techniques have been applied to study the primary photophysical processes occurring in dye-loaded light-scattering powdered samples. In spite of this, there are still no reliable methods for the determination of triplet quantum yields for this kind of systems....

Descripción completa

Detalles Bibliográficos
Autores principales: Tomasini, Eugenia Paula, Braslavsky, Silvia Elsa, San Roman, Enrique Arnoldo
Publicado: 2012
Materias:
cellulose
erythrosine
fluorescent dye
microcrystalline cellulose
rose bengal
solvent
water
article
chemistry
laser
light
photoacoustics
quantum theory
radiation scattering
Cellulose
Erythrosine
Fluorescent Dyes
Lasers
Light
Photoacoustic Techniques
Quantum Theory
Rose Bengal
Scattering, Radiation
Solvents
Water
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_1474905X_v11_n6_p1010_Tomasini
http://hdl.handle.net/20.500.12110/paper_1474905X_v11_n6_p1010_Tomasini
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_1474905X_v11_n6_p1010_Tomasini
record_format dspace
spelling paper:paper_1474905X_v11_n6_p1010_Tomasini2023-06-08T16:17:38Z Triplet quantum yields in light-scattering powder samples measured by laser-induced optoacoustic spectroscopy (LIOAS) Tomasini, Eugenia Paula Braslavsky, Silvia Elsa San Roman, Enrique Arnoldo cellulose erythrosine fluorescent dye microcrystalline cellulose rose bengal solvent water article chemistry laser light photoacoustics quantum theory radiation scattering Cellulose Erythrosine Fluorescent Dyes Lasers Light Photoacoustic Techniques Quantum Theory Rose Bengal Scattering, Radiation Solvents Water In recent years, different methods and techniques have been applied to study the primary photophysical processes occurring in dye-loaded light-scattering powdered samples. In spite of this, there are still no reliable methods for the determination of triplet quantum yields for this kind of systems. Laser-induced optoacoustic spectroscopy (LIOAS) has been extensively used for the determination of triplet quantum yields of dyes in solution. In a previous work, LIOAS was applied to the measurement of absolute emission quantum yields of highly fluorescent powdered samples. Excellent agreement was found with values obtained from reflectance data. In this work, we apply the same technique for the determination of triplet quantum yields of Rose Bengal and Erythrosine B adsorbed on microcrystalline cellulose. In contrast to water and other solvents, internal conversion cannot be neglected in the cellulose environment. The triplet quantum yield for both dyes is around 0.55 and does not change with dye concentration. © The Royal Society of Chemistry and Owner Societies 2012. Fil:Tomasini, E.P. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Braslavsky, S.E. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:San Román, E. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2012 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_1474905X_v11_n6_p1010_Tomasini http://hdl.handle.net/20.500.12110/paper_1474905X_v11_n6_p1010_Tomasini
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic cellulose
erythrosine
fluorescent dye
microcrystalline cellulose
rose bengal
solvent
water
article
chemistry
laser
light
photoacoustics
quantum theory
radiation scattering
Cellulose
Erythrosine
Fluorescent Dyes
Lasers
Light
Photoacoustic Techniques
Quantum Theory
Rose Bengal
Scattering, Radiation
Solvents
Water
spellingShingle cellulose
erythrosine
fluorescent dye
microcrystalline cellulose
rose bengal
solvent
water
article
chemistry
laser
light
photoacoustics
quantum theory
radiation scattering
Cellulose
Erythrosine
Fluorescent Dyes
Lasers
Light
Photoacoustic Techniques
Quantum Theory
Rose Bengal
Scattering, Radiation
Solvents
Water
Tomasini, Eugenia Paula
Braslavsky, Silvia Elsa
San Roman, Enrique Arnoldo
Triplet quantum yields in light-scattering powder samples measured by laser-induced optoacoustic spectroscopy (LIOAS)
topic_facet cellulose
erythrosine
fluorescent dye
microcrystalline cellulose
rose bengal
solvent
water
article
chemistry
laser
light
photoacoustics
quantum theory
radiation scattering
Cellulose
Erythrosine
Fluorescent Dyes
Lasers
Light
Photoacoustic Techniques
Quantum Theory
Rose Bengal
Scattering, Radiation
Solvents
Water
description In recent years, different methods and techniques have been applied to study the primary photophysical processes occurring in dye-loaded light-scattering powdered samples. In spite of this, there are still no reliable methods for the determination of triplet quantum yields for this kind of systems. Laser-induced optoacoustic spectroscopy (LIOAS) has been extensively used for the determination of triplet quantum yields of dyes in solution. In a previous work, LIOAS was applied to the measurement of absolute emission quantum yields of highly fluorescent powdered samples. Excellent agreement was found with values obtained from reflectance data. In this work, we apply the same technique for the determination of triplet quantum yields of Rose Bengal and Erythrosine B adsorbed on microcrystalline cellulose. In contrast to water and other solvents, internal conversion cannot be neglected in the cellulose environment. The triplet quantum yield for both dyes is around 0.55 and does not change with dye concentration. © The Royal Society of Chemistry and Owner Societies 2012.
author Tomasini, Eugenia Paula
Braslavsky, Silvia Elsa
San Roman, Enrique Arnoldo
author_facet Tomasini, Eugenia Paula
Braslavsky, Silvia Elsa
San Roman, Enrique Arnoldo
author_sort Tomasini, Eugenia Paula
title Triplet quantum yields in light-scattering powder samples measured by laser-induced optoacoustic spectroscopy (LIOAS)
title_short Triplet quantum yields in light-scattering powder samples measured by laser-induced optoacoustic spectroscopy (LIOAS)
title_full Triplet quantum yields in light-scattering powder samples measured by laser-induced optoacoustic spectroscopy (LIOAS)
title_fullStr Triplet quantum yields in light-scattering powder samples measured by laser-induced optoacoustic spectroscopy (LIOAS)
title_full_unstemmed Triplet quantum yields in light-scattering powder samples measured by laser-induced optoacoustic spectroscopy (LIOAS)
title_sort triplet quantum yields in light-scattering powder samples measured by laser-induced optoacoustic spectroscopy (lioas)
publishDate 2012
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_1474905X_v11_n6_p1010_Tomasini
http://hdl.handle.net/20.500.12110/paper_1474905X_v11_n6_p1010_Tomasini
work_keys_str_mv AT tomasinieugeniapaula tripletquantumyieldsinlightscatteringpowdersamplesmeasuredbylaserinducedoptoacousticspectroscopylioas
AT braslavskysilviaelsa tripletquantumyieldsinlightscatteringpowdersamplesmeasuredbylaserinducedoptoacousticspectroscopylioas
AT sanromanenriquearnoldo tripletquantumyieldsinlightscatteringpowdersamplesmeasuredbylaserinducedoptoacousticspectroscopylioas
_version_ 1768545708942557184

Ejemplares similares