Back isomerization from the excited state photoisomer of the laser dye 3,3' -diethyloxadicarbocyanine iodide (DODCI)

Autores
Scaffardi, Lucía Beatriz; Bilmes, Gabriel Mario; Schinca, Daniel Carlos; Tocho, Jorge Omar
Año de publicación
1987
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The fluorescence of the first excited state of both the normal (N) and the photoisomer (P) forms of 3,3'-diethyloxadicarbocyanine iodide (DODCI) were analyzed under steady state conditions. Argon ion laser and argon ion pumped dye laser were used for excitation. The long wavelength fluorescence, belonging mainly to the P form, shows a similar degree of polarization as the short wavelength part arising from the N form. The fluorescence spectra of DODCI at different fluences and different wavelengths of laser excitation yielded information about the relative concentrations of the N and P forms. Photoequilibrium between the two species via the excited state of the P form is postulated. The rate constant estimated for the P★→N transition is much lower than the one expected from a model of a twisted state through which all the non-radiative transitions of the P form take place. The value is in agreement with that derived from the previous optoacoustic measurements exciting with higher fluences. The results indicate that stimulated emission and excited state absorption are not important under the conditions of the experiment.
Centro de Investigaciones Ópticas
Materia
Física
Normal forms
Photoisomer forms
Argon ion laser
Argon ion pumped dye laser
Fluorescence spectra
3,3'-diethyloxadicarbocyanine iodide (DODCI)
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:10915/92929

id SEDICI_399d685b002ce537b81301aedcb37d7b
oai_identifier_str oai:sedici.unlp.edu.ar:10915/92929
network_acronym_str SEDICI
repository_id_str 1329
network_name_str SEDICI (UNLP)
spelling Back isomerization from the excited state photoisomer of the laser dye 3,3' -diethyloxadicarbocyanine iodide (DODCI)Scaffardi, Lucía BeatrizBilmes, Gabriel MarioSchinca, Daniel CarlosTocho, Jorge OmarFísicaNormal formsPhotoisomer formsArgon ion laserArgon ion pumped dye laserFluorescence spectra3,3'-diethyloxadicarbocyanine iodide (DODCI)The fluorescence of the first excited state of both the normal (N) and the photoisomer (P) forms of 3,3'-diethyloxadicarbocyanine iodide (DODCI) were analyzed under steady state conditions. Argon ion laser and argon ion pumped dye laser were used for excitation. The long wavelength fluorescence, belonging mainly to the P form, shows a similar degree of polarization as the short wavelength part arising from the N form. The fluorescence spectra of DODCI at different fluences and different wavelengths of laser excitation yielded information about the relative concentrations of the N and P forms. Photoequilibrium between the two species via the excited state of the P form is postulated. The rate constant estimated for the P★→N transition is much lower than the one expected from a model of a twisted state through which all the non-radiative transitions of the P form take place. The value is in agreement with that derived from the previous optoacoustic measurements exciting with higher fluences. The results indicate that stimulated emission and excited state absorption are not important under the conditions of the experiment.Centro de Investigaciones Ópticas1987info: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/10915/92929enginfo:eu-repo/semantics/altIdentifier/issn/0009-2614info:eu-repo/semantics/altIdentifier/hdl/11746/501info: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:UNLP2025-09-29T11:19:16Zoai:sedici.unlp.edu.ar:10915/92929Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-09-29 11:19:17.185SEDICI (UNLP) - Universidad Nacional de La Platafalse
dc.title.none.fl_str_mv Back isomerization from the excited state photoisomer of the laser dye 3,3' -diethyloxadicarbocyanine iodide (DODCI)
title Back isomerization from the excited state photoisomer of the laser dye 3,3' -diethyloxadicarbocyanine iodide (DODCI)
spellingShingle Back isomerization from the excited state photoisomer of the laser dye 3,3' -diethyloxadicarbocyanine iodide (DODCI)
Scaffardi, Lucía Beatriz
Física
Normal forms
Photoisomer forms
Argon ion laser
Argon ion pumped dye laser
Fluorescence spectra
3,3'-diethyloxadicarbocyanine iodide (DODCI)
title_short Back isomerization from the excited state photoisomer of the laser dye 3,3' -diethyloxadicarbocyanine iodide (DODCI)
title_full Back isomerization from the excited state photoisomer of the laser dye 3,3' -diethyloxadicarbocyanine iodide (DODCI)
title_fullStr Back isomerization from the excited state photoisomer of the laser dye 3,3' -diethyloxadicarbocyanine iodide (DODCI)
title_full_unstemmed Back isomerization from the excited state photoisomer of the laser dye 3,3' -diethyloxadicarbocyanine iodide (DODCI)
title_sort Back isomerization from the excited state photoisomer of the laser dye 3,3' -diethyloxadicarbocyanine iodide (DODCI)
dc.creator.none.fl_str_mv Scaffardi, Lucía Beatriz
Bilmes, Gabriel Mario
Schinca, Daniel Carlos
Tocho, Jorge Omar
author Scaffardi, Lucía Beatriz
author_facet Scaffardi, Lucía Beatriz
Bilmes, Gabriel Mario
Schinca, Daniel Carlos
Tocho, Jorge Omar
author_role author
author2 Bilmes, Gabriel Mario
Schinca, Daniel Carlos
Tocho, Jorge Omar
author2_role author
author
author
dc.subject.none.fl_str_mv Física
Normal forms
Photoisomer forms
Argon ion laser
Argon ion pumped dye laser
Fluorescence spectra
3,3'-diethyloxadicarbocyanine iodide (DODCI)
topic Física
Normal forms
Photoisomer forms
Argon ion laser
Argon ion pumped dye laser
Fluorescence spectra
3,3'-diethyloxadicarbocyanine iodide (DODCI)
dc.description.none.fl_txt_mv The fluorescence of the first excited state of both the normal (N) and the photoisomer (P) forms of 3,3'-diethyloxadicarbocyanine iodide (DODCI) were analyzed under steady state conditions. Argon ion laser and argon ion pumped dye laser were used for excitation. The long wavelength fluorescence, belonging mainly to the P form, shows a similar degree of polarization as the short wavelength part arising from the N form. The fluorescence spectra of DODCI at different fluences and different wavelengths of laser excitation yielded information about the relative concentrations of the N and P forms. Photoequilibrium between the two species via the excited state of the P form is postulated. The rate constant estimated for the P★→N transition is much lower than the one expected from a model of a twisted state through which all the non-radiative transitions of the P form take place. The value is in agreement with that derived from the previous optoacoustic measurements exciting with higher fluences. The results indicate that stimulated emission and excited state absorption are not important under the conditions of the experiment.
Centro de Investigaciones Ópticas
description The fluorescence of the first excited state of both the normal (N) and the photoisomer (P) forms of 3,3'-diethyloxadicarbocyanine iodide (DODCI) were analyzed under steady state conditions. Argon ion laser and argon ion pumped dye laser were used for excitation. The long wavelength fluorescence, belonging mainly to the P form, shows a similar degree of polarization as the short wavelength part arising from the N form. The fluorescence spectra of DODCI at different fluences and different wavelengths of laser excitation yielded information about the relative concentrations of the N and P forms. Photoequilibrium between the two species via the excited state of the P form is postulated. The rate constant estimated for the P★→N transition is much lower than the one expected from a model of a twisted state through which all the non-radiative transitions of the P form take place. The value is in agreement with that derived from the previous optoacoustic measurements exciting with higher fluences. The results indicate that stimulated emission and excited state absorption are not important under the conditions of the experiment.
publishDate 1987
dc.date.none.fl_str_mv 1987
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/10915/92929
url http://sedici.unlp.edu.ar/handle/10915/92929
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/issn/0009-2614
info:eu-repo/semantics/altIdentifier/hdl/11746/501
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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