Dual laser excitation of a photochromic system: application to DODCI

A technique based on a combination of pump-and-probe fluorescence and absorption detection was developed in order to obtain the emission parameters of the pholoisomeric (P) species of dyes with noncompletely overlapped absorption spectra of P and the starting species (N ). Near total population tran...

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Detalles Bibliográficos
Autores principales: Duchowicz, Ricardo, Scaffardi, Lucía Beatriz, Di Paolo, Roberto E., Tocho, Jorge Omar
Formato: Articulo
Lenguaje:Inglés
Publicado: 1992
Materias:
Física
Pump-and-probe fluorescence
Absorption detection
Continuous wave high fluence pump laser
Singlet excited states of DODCI
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/92932
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-92932
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Física
Pump-and-probe fluorescence
Absorption detection
Continuous wave high fluence pump laser
Singlet excited states of DODCI
spellingShingle Física
Pump-and-probe fluorescence
Absorption detection
Continuous wave high fluence pump laser
Singlet excited states of DODCI
Duchowicz, Ricardo
Scaffardi, Lucía Beatriz
Di Paolo, Roberto E.
Tocho, Jorge Omar
Dual laser excitation of a photochromic system: application to DODCI
topic_facet Física
Pump-and-probe fluorescence
Absorption detection
Continuous wave high fluence pump laser
Singlet excited states of DODCI
description A technique based on a combination of pump-and-probe fluorescence and absorption detection was developed in order to obtain the emission parameters of the pholoisomeric (P) species of dyes with noncompletely overlapped absorption spectra of P and the starting species (N ). Near total population transfer to the ground state of P was achieved using a continuous wave high fluence pump laser. A pulsed laser probed this population in its absorption region in such a way that the pulsed emission corresponded to fluorescence from P. Absorption measurements allowed us to follow the P population and to establish its relationship with pump fluence and wavelength. The direct monitoring of the P concentration increased the accuracy of the previously reported values for several photophysical parameters. Temperature dependent fluorescence quantum yield and lifetime, emission spectrum, and Arrhenius parameters of the nonradiative decay processes of P from 3,3' diethyloxa dicarbocyanine iodide (DODCI) are given. The mechanism for the direct transformation between N and P through the singlet excited states of DODCI is reevaluated.
format Articulo
Articulo
author Duchowicz, Ricardo
Scaffardi, Lucía Beatriz
Di Paolo, Roberto E.
Tocho, Jorge Omar
author_facet Duchowicz, Ricardo
Scaffardi, Lucía Beatriz
Di Paolo, Roberto E.
Tocho, Jorge Omar
author_sort Duchowicz, Ricardo
title Dual laser excitation of a photochromic system: application to DODCI
title_short Dual laser excitation of a photochromic system: application to DODCI
title_full Dual laser excitation of a photochromic system: application to DODCI
title_fullStr Dual laser excitation of a photochromic system: application to DODCI
title_full_unstemmed Dual laser excitation of a photochromic system: application to DODCI
title_sort dual laser excitation of a photochromic system: application to dodci
publishDate 1992
url http://sedici.unlp.edu.ar/handle/10915/92932
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AT scaffardiluciabeatriz duallaserexcitationofaphotochromicsystemapplicationtododci
AT dipaolorobertoe duallaserexcitationofaphotochromicsystemapplicationtododci
AT tochojorgeomar duallaserexcitationofaphotochromicsystemapplicationtododci
bdutipo_str Repositorios
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