On the photophysical behaviour of 4-halo-5-phenylisoxazoles

Detalhes bibliográficos
Autor(a) principal: Fonseca, Sofia M.
Data de Publicação: 2005
Outros Autores: Burrows, Hugh D., Nunes, Cláudio M., Melo, Teresa M. V. D. Pinho e, Gonsalves, António M. d'A. Rocha
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/10316/5099
https://doi.org/10.1016/j.cplett.2005.08.056
Resumo: Detailed spectral and photophysical properties of 4-halo-5-phenylisoxazoles in cyclohexane solutions are presented, including measurements of energies of lowest excited singlet and triplet states, fluorescence quantum yields, lifetimes, phosphorescence and triplet-singlet difference absorption spectra. Upon addition of ethanol, loss of vibrational structure is observed in fluorescence spectra and attributed to formation of isoxazole-ethanol aggregates. The relevance of these properties to the photochemical and thermal reactivity of these systems is discussed.
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spelling On the photophysical behaviour of 4-halo-5-phenylisoxazolesDetailed spectral and photophysical properties of 4-halo-5-phenylisoxazoles in cyclohexane solutions are presented, including measurements of energies of lowest excited singlet and triplet states, fluorescence quantum yields, lifetimes, phosphorescence and triplet-singlet difference absorption spectra. Upon addition of ethanol, loss of vibrational structure is observed in fluorescence spectra and attributed to formation of isoxazole-ethanol aggregates. The relevance of these properties to the photochemical and thermal reactivity of these systems is discussed.http://www.sciencedirect.com/science/article/B6TFN-4H16P6W-D/1/aee849eb84047bd4755109fdbbc0c5222005info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleaplication/PDFhttp://hdl.handle.net/10316/5099http://hdl.handle.net/10316/5099https://doi.org/10.1016/j.cplett.2005.08.056engChemical Physics Letters. 414:1-3 (2005) 98-101Fonseca, Sofia M.Burrows, Hugh D.Nunes, Cláudio M.Melo, Teresa M. V. D. Pinho eGonsalves, António M. d'A. Rochainfo:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2020-11-06T16:48:56Zoai:estudogeral.uc.pt:10316/5099Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T21:01:40.482857Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse
dc.title.none.fl_str_mv On the photophysical behaviour of 4-halo-5-phenylisoxazoles
title On the photophysical behaviour of 4-halo-5-phenylisoxazoles
spellingShingle On the photophysical behaviour of 4-halo-5-phenylisoxazoles
Fonseca, Sofia M.
title_short On the photophysical behaviour of 4-halo-5-phenylisoxazoles
title_full On the photophysical behaviour of 4-halo-5-phenylisoxazoles
title_fullStr On the photophysical behaviour of 4-halo-5-phenylisoxazoles
title_full_unstemmed On the photophysical behaviour of 4-halo-5-phenylisoxazoles
title_sort On the photophysical behaviour of 4-halo-5-phenylisoxazoles
author Fonseca, Sofia M.
author_facet Fonseca, Sofia M.
Burrows, Hugh D.
Nunes, Cláudio M.
Melo, Teresa M. V. D. Pinho e
Gonsalves, António M. d'A. Rocha
author_role author
author2 Burrows, Hugh D.
Nunes, Cláudio M.
Melo, Teresa M. V. D. Pinho e
Gonsalves, António M. d'A. Rocha
author2_role author
author
author
author
dc.contributor.author.fl_str_mv Fonseca, Sofia M.
Burrows, Hugh D.
Nunes, Cláudio M.
Melo, Teresa M. V. D. Pinho e
Gonsalves, António M. d'A. Rocha
description Detailed spectral and photophysical properties of 4-halo-5-phenylisoxazoles in cyclohexane solutions are presented, including measurements of energies of lowest excited singlet and triplet states, fluorescence quantum yields, lifetimes, phosphorescence and triplet-singlet difference absorption spectra. Upon addition of ethanol, loss of vibrational structure is observed in fluorescence spectra and attributed to formation of isoxazole-ethanol aggregates. The relevance of these properties to the photochemical and thermal reactivity of these systems is discussed.
publishDate 2005
dc.date.none.fl_str_mv 2005
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://hdl.handle.net/10316/5099
http://hdl.handle.net/10316/5099
https://doi.org/10.1016/j.cplett.2005.08.056
url http://hdl.handle.net/10316/5099
https://doi.org/10.1016/j.cplett.2005.08.056
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv Chemical Physics Letters. 414:1-3 (2005) 98-101
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv aplication/PDF
dc.source.none.fl_str_mv reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
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repository.name.fl_str_mv Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
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