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 enviada
- 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.
- Materia
-
Ciencias Físicas
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/4.0/
- Repositorio
- Institución
- Comisión de Investigaciones Científicas de la Provincia de Buenos Aires
- OAI Identificador
- oai:digital.cic.gba.gob.ar:11746/501
Ver los metadatos del registro completo
id |
CICBA_1f5d9bc49e7cca472e4cb8b2757fc14e |
---|---|
oai_identifier_str |
oai:digital.cic.gba.gob.ar:11746/501 |
network_acronym_str |
CICBA |
repository_id_str |
9441 |
network_name_str |
CIC Digital (CICBA) |
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 OmarCiencias Físicasnormal 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 Ópticas (CIOP)1987info:eu-repo/semantics/articleinfo:eu-repo/semantics/submittedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfhttps://digital.cic.gba.gob.ar/handle/11746/501enghttp://digital.cic.gba.gob.ar/handle/123456789/68info:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by/4.0/reponame:CIC Digital (CICBA)instname:Comisión de Investigaciones Científicas de la Provincia de Buenos Airesinstacron:CICBA2025-09-29T13:40:21Zoai:digital.cic.gba.gob.ar:11746/501Institucionalhttp://digital.cic.gba.gob.arOrganismo científico-tecnológicoNo correspondehttp://digital.cic.gba.gob.ar/oai/snrdmarisa.degiusti@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:94412025-09-29 13:40:21.229CIC Digital (CICBA) - Comisión de Investigaciones Científicas de la Provincia de Buenos Airesfalse |
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 Ciencias Físicas 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 |
Ciencias Físicas normal forms photoisomer forms argon ion laser argon ion pumped dye laser fluorescence spectra 3,3' -diethyloxadicarbocyanine IODIDE (DODCI) |
topic |
Ciencias Físicas 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. |
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/submittedVersion http://purl.org/coar/resource_type/c_6501 info:ar-repo/semantics/articulo |
format |
article |
status_str |
submittedVersion |
dc.identifier.none.fl_str_mv |
https://digital.cic.gba.gob.ar/handle/11746/501 |
url |
https://digital.cic.gba.gob.ar/handle/11746/501 |
dc.language.none.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
http://digital.cic.gba.gob.ar/handle/123456789/68 |
dc.rights.none.fl_str_mv |
info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/4.0/ |
eu_rights_str_mv |
openAccess |
rights_invalid_str_mv |
http://creativecommons.org/licenses/by/4.0/ |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Centro de Investigaciones Ópticas (CIOP) |
publisher.none.fl_str_mv |
Centro de Investigaciones Ópticas (CIOP) |
dc.source.none.fl_str_mv |
reponame:CIC Digital (CICBA) instname:Comisión de Investigaciones Científicas de la Provincia de Buenos Aires instacron:CICBA |
reponame_str |
CIC Digital (CICBA) |
collection |
CIC Digital (CICBA) |
instname_str |
Comisión de Investigaciones Científicas de la Provincia de Buenos Aires |
instacron_str |
CICBA |
institution |
CICBA |
repository.name.fl_str_mv |
CIC Digital (CICBA) - Comisión de Investigaciones Científicas de la Provincia de Buenos Aires |
repository.mail.fl_str_mv |
marisa.degiusti@sedici.unlp.edu.ar |
_version_ |
1844618618334085120 |
score |
13.070432 |