Properties of singlet- and triplet-excited states of hemicyanine dyes

The fluorescence emission spectra and fluorescence quantum yields of hemicyanine dyes LDS 698, LDS 722, and LDS 730 were measured in different media. No transient species was detected in the laser flash-photolysis experiments performed with Ar-saturated solutions of the dyes in methanol. However, in...

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Detalles Bibliográficos
Autores principales: Mártire, Daniel Osvaldo, Massad, Walter A., Montejano, Hernán A., González, Mónica Cristina, Caregnato, Paula, Villata, Laura Sofía, García, Norman A.
Formato: Articulo Comunicacion
Lenguaje:Inglés
Publicado: 2014
Materias:
Química
triplet states
singlet oxygen
hemicyanine dyes
flash-photolysis
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/145202
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-145202
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Química
triplet states
singlet oxygen
hemicyanine dyes
flash-photolysis
spellingShingle Química
triplet states
singlet oxygen
hemicyanine dyes
flash-photolysis
Mártire, Daniel Osvaldo
Massad, Walter A.
Montejano, Hernán A.
González, Mónica Cristina
Caregnato, Paula
Villata, Laura Sofía
García, Norman A.
Properties of singlet- and triplet-excited states of hemicyanine dyes
topic_facet Química
triplet states
singlet oxygen
hemicyanine dyes
flash-photolysis
description The fluorescence emission spectra and fluorescence quantum yields of hemicyanine dyes LDS 698, LDS 722, and LDS 730 were measured in different media. No transient species was detected in the laser flash-photolysis experiments performed with Ar-saturated solutions of the dyes in methanol. However, in the presence of 0.08 M potassium iodide, the absorption of the triplet states was clearly observed. Oxygen consumption measurements in the absence and presence of a chemical trap (furfuryl alcohol) in MeOH : H2O (ϕr = 1 : 1) solutions of the dyes containing KI confirmed the generation of singlet molecular oxygen.
format Articulo
Comunicacion
author Mártire, Daniel Osvaldo
Massad, Walter A.
Montejano, Hernán A.
González, Mónica Cristina
Caregnato, Paula
Villata, Laura Sofía
García, Norman A.
author_facet Mártire, Daniel Osvaldo
Massad, Walter A.
Montejano, Hernán A.
González, Mónica Cristina
Caregnato, Paula
Villata, Laura Sofía
García, Norman A.
author_sort Mártire, Daniel Osvaldo
title Properties of singlet- and triplet-excited states of hemicyanine dyes
title_short Properties of singlet- and triplet-excited states of hemicyanine dyes
title_full Properties of singlet- and triplet-excited states of hemicyanine dyes
title_fullStr Properties of singlet- and triplet-excited states of hemicyanine dyes
title_full_unstemmed Properties of singlet- and triplet-excited states of hemicyanine dyes
title_sort properties of singlet- and triplet-excited states of hemicyanine dyes
publishDate 2014
url http://sedici.unlp.edu.ar/handle/10915/145202
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