Dependence of the thioxanthone triplet-triplet absorption spectrum with solvent polarity and aromatic ring substitution

Detalhes bibliográficos
Autor(a) principal: Ferreira,Giovana C.
Data de Publicação: 2006
Outros Autores: Schmitt,Carla C., Neumann,Miguel G.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Journal of the Brazilian Chemical Society (Online)
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532006000500013
Resumo: The triplet-triplet (TT) and transient absorptions of non-substituted and substituted thioxanthones has been studied in different solvents in order to ascertain the effect of the solvent, as well as the substituents on the aromatic ring. Spectra taken after a couple of ms after the flash show three main transient absorptions due to the triplet state (600-650 nm), the thioxanthone ketyl radical (~450 nm) and an overlap of both (~300 nm). The amount of radicals formed in non hydroxylic solvents is much lower than in alcohols. The maxima of the TT absorption peaks show a good correlation with the E T(30) solvent parameter.
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spelling Dependence of the thioxanthone triplet-triplet absorption spectrum with solvent polarity and aromatic ring substitutionthioxanthonetriplet-triplet absorptionThe triplet-triplet (TT) and transient absorptions of non-substituted and substituted thioxanthones has been studied in different solvents in order to ascertain the effect of the solvent, as well as the substituents on the aromatic ring. Spectra taken after a couple of ms after the flash show three main transient absorptions due to the triplet state (600-650 nm), the thioxanthone ketyl radical (~450 nm) and an overlap of both (~300 nm). The amount of radicals formed in non hydroxylic solvents is much lower than in alcohols. The maxima of the TT absorption peaks show a good correlation with the E T(30) solvent parameter.Sociedade Brasileira de Química2006-10-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532006000500013Journal of the Brazilian Chemical Society v.17 n.5 2006reponame:Journal of the Brazilian Chemical Society (Online)instname:Sociedade Brasileira de Química (SBQ)instacron:SBQ10.1590/S0103-50532006000500013info:eu-repo/semantics/openAccessFerreira,Giovana C.Schmitt,Carla C.Neumann,Miguel G.eng2006-12-01T00:00:00Zoai:scielo:S0103-50532006000500013Revistahttp://jbcs.sbq.org.brONGhttps://old.scielo.br/oai/scielo-oai.php||office@jbcs.sbq.org.br1678-47900103-5053opendoar:2006-12-01T00:00Journal of the Brazilian Chemical Society (Online) - Sociedade Brasileira de Química (SBQ)false
dc.title.none.fl_str_mv Dependence of the thioxanthone triplet-triplet absorption spectrum with solvent polarity and aromatic ring substitution
title Dependence of the thioxanthone triplet-triplet absorption spectrum with solvent polarity and aromatic ring substitution
spellingShingle Dependence of the thioxanthone triplet-triplet absorption spectrum with solvent polarity and aromatic ring substitution
Ferreira,Giovana C.
thioxanthone
triplet-triplet absorption
title_short Dependence of the thioxanthone triplet-triplet absorption spectrum with solvent polarity and aromatic ring substitution
title_full Dependence of the thioxanthone triplet-triplet absorption spectrum with solvent polarity and aromatic ring substitution
title_fullStr Dependence of the thioxanthone triplet-triplet absorption spectrum with solvent polarity and aromatic ring substitution
title_full_unstemmed Dependence of the thioxanthone triplet-triplet absorption spectrum with solvent polarity and aromatic ring substitution
title_sort Dependence of the thioxanthone triplet-triplet absorption spectrum with solvent polarity and aromatic ring substitution
author Ferreira,Giovana C.
author_facet Ferreira,Giovana C.
Schmitt,Carla C.
Neumann,Miguel G.
author_role author
author2 Schmitt,Carla C.
Neumann,Miguel G.
author2_role author
author
dc.contributor.author.fl_str_mv Ferreira,Giovana C.
Schmitt,Carla C.
Neumann,Miguel G.
dc.subject.por.fl_str_mv thioxanthone
triplet-triplet absorption
topic thioxanthone
triplet-triplet absorption
description The triplet-triplet (TT) and transient absorptions of non-substituted and substituted thioxanthones has been studied in different solvents in order to ascertain the effect of the solvent, as well as the substituents on the aromatic ring. Spectra taken after a couple of ms after the flash show three main transient absorptions due to the triplet state (600-650 nm), the thioxanthone ketyl radical (~450 nm) and an overlap of both (~300 nm). The amount of radicals formed in non hydroxylic solvents is much lower than in alcohols. The maxima of the TT absorption peaks show a good correlation with the E T(30) solvent parameter.
publishDate 2006
dc.date.none.fl_str_mv 2006-10-01
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532006000500013
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532006000500013
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/S0103-50532006000500013
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv text/html
dc.publisher.none.fl_str_mv Sociedade Brasileira de Química
publisher.none.fl_str_mv Sociedade Brasileira de Química
dc.source.none.fl_str_mv Journal of the Brazilian Chemical Society v.17 n.5 2006
reponame:Journal of the Brazilian Chemical Society (Online)
instname:Sociedade Brasileira de Química (SBQ)
instacron:SBQ
instname_str Sociedade Brasileira de Química (SBQ)
instacron_str SBQ
institution SBQ
reponame_str Journal of the Brazilian Chemical Society (Online)
collection Journal of the Brazilian Chemical Society (Online)
repository.name.fl_str_mv Journal of the Brazilian Chemical Society (Online) - Sociedade Brasileira de Química (SBQ)
repository.mail.fl_str_mv ||office@jbcs.sbq.org.br
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