Photophysical Processes of Polymethine Dyes : An Absorption, Emission, and Optoacoustic Study on 3,3'-Diethylthladicarbocyanine Iodide

Autores
Bilmes, Gabriel Mario; Tocho, Jorge Omar; Braslavsky, Silvia E.
Año de publicación
1989
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Laser Hash photolysis, laser induced optoacoustic spectroscopy (LIOAS), and fluorescence data were used for the study of the photophysical deactivation processes of excited 3,3 diethylthiadicarbocyanine iodide (DTDCI). Direct excitation of this molecule in air saturated methanol solutions at room temperature results in the formation of only one transient species, a photoisomer, the spectrum of which was derived for the 600-680 nm spectral range. The energy content difference between the ground state of the stable form and that of the photoisomer was evaluated, ΔE=0.15±0.15eV, as well as limit values for the photoisomer fluorescence quantum efficiency (ΦPf)<0.2 and for the quantum yield for the back photoisomerization from the first excited singlet state of the photoisomer to the ground state of the stable form (ΦPN≤0.14).
Centro de Investigaciones Ópticas
Materia
Física
Laser hash photolysis
Laser induced optoacoustic spectroscopy
Fluorescence data
Ground state
Stable form
Photoisomer fluorescence quantum efficiency
Nivel de accesibilidad
acceso abierto
Condiciones de uso
http://creativecommons.org/licenses/by-nc-sa/4.0/
Repositorio
SEDICI (UNLP)
Institución
Universidad Nacional de La Plata
OAI Identificador
oai:sedici.unlp.edu.ar:10915/92925
Acceder
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oai_identifier_str oai:sedici.unlp.edu.ar:10915/92925
network_acronym_str SEDICI
repository_id_str 1329
network_name_str SEDICI (UNLP)
spelling Photophysical Processes of Polymethine Dyes : An Absorption, Emission, and Optoacoustic Study on 3,3'-Diethylthladicarbocyanine IodideBilmes, Gabriel MarioTocho, Jorge OmarBraslavsky, Silvia E.FísicaLaser hash photolysisLaser induced optoacoustic spectroscopyFluorescence dataGround stateStable formPhotoisomer fluorescence quantum efficiencyLaser Hash photolysis, laser induced optoacoustic spectroscopy (LIOAS), and fluorescence data were used for the study of the photophysical deactivation processes of excited 3,3 diethylthiadicarbocyanine iodide (DTDCI). Direct excitation of this molecule in air saturated methanol solutions at room temperature results in the formation of only one transient species, a photoisomer, the spectrum of which was derived for the 600-680 nm spectral range. The energy content difference between the ground state of the stable form and that of the photoisomer was evaluated, ΔE=0.15±0.15eV, as well as limit values for the photoisomer fluorescence quantum efficiency (ΦPf)<0.2 and for the quantum yield for the back photoisomerization from the first excited singlet state of the photoisomer to the ground state of the stable form (ΦPN≤0.14).Centro de Investigaciones Ópticas1989info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfhttp://sedici.unlp.edu.ar/handle/10915/92925enginfo:eu-repo/semantics/altIdentifier/issn/0022-365info:eu-repo/semantics/altIdentifier/hdl/11746/498info:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-nc-sa/4.0/Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)reponame:SEDICI (UNLP)instname:Universidad Nacional de La Platainstacron:UNLP2025-10-22T17:00:06Zoai:sedici.unlp.edu.ar:10915/92925Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-10-22 17:00:06.9SEDICI (UNLP) - Universidad Nacional de La Platafalse
dc.title.none.fl_str_mv Photophysical Processes of Polymethine Dyes : An Absorption, Emission, and Optoacoustic Study on 3,3'-Diethylthladicarbocyanine Iodide
title Photophysical Processes of Polymethine Dyes : An Absorption, Emission, and Optoacoustic Study on 3,3'-Diethylthladicarbocyanine Iodide
spellingShingle Photophysical Processes of Polymethine Dyes : An Absorption, Emission, and Optoacoustic Study on 3,3'-Diethylthladicarbocyanine Iodide
Bilmes, Gabriel Mario
Física
Laser hash photolysis
Laser induced optoacoustic spectroscopy
Fluorescence data
Ground state
Stable form
Photoisomer fluorescence quantum efficiency
title_short Photophysical Processes of Polymethine Dyes : An Absorption, Emission, and Optoacoustic Study on 3,3'-Diethylthladicarbocyanine Iodide
title_full Photophysical Processes of Polymethine Dyes : An Absorption, Emission, and Optoacoustic Study on 3,3'-Diethylthladicarbocyanine Iodide
title_fullStr Photophysical Processes of Polymethine Dyes : An Absorption, Emission, and Optoacoustic Study on 3,3'-Diethylthladicarbocyanine Iodide
title_full_unstemmed Photophysical Processes of Polymethine Dyes : An Absorption, Emission, and Optoacoustic Study on 3,3'-Diethylthladicarbocyanine Iodide
title_sort Photophysical Processes of Polymethine Dyes : An Absorption, Emission, and Optoacoustic Study on 3,3'-Diethylthladicarbocyanine Iodide
dc.creator.none.fl_str_mv Bilmes, Gabriel Mario
Tocho, Jorge Omar
Braslavsky, Silvia E.
author Bilmes, Gabriel Mario
author_facet Bilmes, Gabriel Mario
Tocho, Jorge Omar
Braslavsky, Silvia E.
author_role author
author2 Tocho, Jorge Omar
Braslavsky, Silvia E.
author2_role author
author
dc.subject.none.fl_str_mv Física
Laser hash photolysis
Laser induced optoacoustic spectroscopy
Fluorescence data
Ground state
Stable form
Photoisomer fluorescence quantum efficiency
topic Física
Laser hash photolysis
Laser induced optoacoustic spectroscopy
Fluorescence data
Ground state
Stable form
Photoisomer fluorescence quantum efficiency
dc.description.none.fl_txt_mv Laser Hash photolysis, laser induced optoacoustic spectroscopy (LIOAS), and fluorescence data were used for the study of the photophysical deactivation processes of excited 3,3 diethylthiadicarbocyanine iodide (DTDCI). Direct excitation of this molecule in air saturated methanol solutions at room temperature results in the formation of only one transient species, a photoisomer, the spectrum of which was derived for the 600-680 nm spectral range. The energy content difference between the ground state of the stable form and that of the photoisomer was evaluated, ΔE=0.15±0.15eV, as well as limit values for the photoisomer fluorescence quantum efficiency (ΦPf)<0.2 and for the quantum yield for the back photoisomerization from the first excited singlet state of the photoisomer to the ground state of the stable form (ΦPN≤0.14).
Centro de Investigaciones Ópticas
description Laser Hash photolysis, laser induced optoacoustic spectroscopy (LIOAS), and fluorescence data were used for the study of the photophysical deactivation processes of excited 3,3 diethylthiadicarbocyanine iodide (DTDCI). Direct excitation of this molecule in air saturated methanol solutions at room temperature results in the formation of only one transient species, a photoisomer, the spectrum of which was derived for the 600-680 nm spectral range. The energy content difference between the ground state of the stable form and that of the photoisomer was evaluated, ΔE=0.15±0.15eV, as well as limit values for the photoisomer fluorescence quantum efficiency (ΦPf)<0.2 and for the quantum yield for the back photoisomerization from the first excited singlet state of the photoisomer to the ground state of the stable form (ΦPN≤0.14).
publishDate 1989
dc.date.none.fl_str_mv 1989
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Articulo
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://sedici.unlp.edu.ar/handle/10915/92925
url http://sedici.unlp.edu.ar/handle/10915/92925
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/issn/0022-365
info:eu-repo/semantics/altIdentifier/hdl/11746/498
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by-nc-sa/4.0/
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
eu_rights_str_mv openAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by-nc-sa/4.0/
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
dc.format.none.fl_str_mv application/pdf
dc.source.none.fl_str_mv reponame:SEDICI (UNLP)
instname:Universidad Nacional de La Plata
instacron:UNLP
reponame_str SEDICI (UNLP)
collection SEDICI (UNLP)
instname_str Universidad Nacional de La Plata
instacron_str UNLP
institution UNLP
repository.name.fl_str_mv SEDICI (UNLP) - Universidad Nacional de La Plata
repository.mail.fl_str_mv alira@sedici.unlp.edu.ar
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score 12.982451

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