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

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 te...

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Autores principales: Bilmes, Gabriel Mario, Tocho, Jorge Omar, Braslavsky, Silvia E.
Formato: Articulo
Lenguaje:Inglés
Publicado: 1989
Materias:
Física
Laser hash photolysis
Laser induced optoacoustic spectroscopy
Fluorescence data
Ground state
Stable form
Photoisomer fluorescence quantum efficiency
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/92925
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-92925
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Física
Laser hash photolysis
Laser induced optoacoustic spectroscopy
Fluorescence data
Ground state
Stable form
Photoisomer fluorescence quantum efficiency
spellingShingle Física
Laser hash photolysis
Laser induced optoacoustic spectroscopy
Fluorescence data
Ground state
Stable form
Photoisomer fluorescence quantum efficiency
Bilmes, Gabriel Mario
Tocho, Jorge Omar
Braslavsky, Silvia E.
Photophysical Processes of Polymethine Dyes : An Absorption, Emission, and Optoacoustic Study on 3,3'-Diethylthladicarbocyanine Iodide
topic_facet Física
Laser hash photolysis
Laser induced optoacoustic spectroscopy
Fluorescence data
Ground state
Stable form
Photoisomer fluorescence quantum efficiency
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).
format Articulo
Articulo
author Bilmes, Gabriel Mario
Tocho, Jorge Omar
Braslavsky, Silvia E.
author_facet Bilmes, Gabriel Mario
Tocho, Jorge Omar
Braslavsky, Silvia E.
author_sort Bilmes, Gabriel Mario
title Photophysical Processes of Polymethine Dyes : An Absorption, Emission, and Optoacoustic Study on 3,3'-Diethylthladicarbocyanine Iodide
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
publishDate 1989
url http://sedici.unlp.edu.ar/handle/10915/92925
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AT tochojorgeomar photophysicalprocessesofpolymethinedyesanabsorptionemissionandoptoacousticstudyon33diethylthladicarbocyanineiodide
AT braslavskysilviae photophysicalprocessesofpolymethinedyesanabsorptionemissionandoptoacousticstudyon33diethylthladicarbocyanineiodide
bdutipo_str Repositorios
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