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
- Institución
- Universidad Nacional de La Plata
- OAI Identificador
- oai:sedici.unlp.edu.ar:10915/92929
Ver los metadatos del registro completo
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 |
_version_ |
1844616066380070912 |
score |
13.070432 |