Luminescence investigation of the Sm(III)-b-diketonates with sulfoxides, phosphine oxides and amides ligands.

Registro completo de metadados
MetadadosDescriçãoIdioma
Autor(es): dc.creatorBrito, Hermi Felinto de-
Autor(es): dc.creatorMalta, Oscar Manoel Loureiro-
Autor(es): dc.creatorFelinto, Maria Claudia França da Cunha-
Autor(es): dc.creatorTeotonio, Ercules Epaminondas de Sousa-
Autor(es): dc.creatorMenezes, Jorge Fernando Silva de-
Autor(es): dc.creatorSilva, C. F. B.-
Autor(es): dc.creatorTomiyama, C. S.-
Autor(es): dc.creatorCarvalho, Carlos Alberto Alves de-
Data de aceite: dc.date.accessioned2019-11-06T13:33:16Z-
Data de disponibilização: dc.date.available2019-11-06T13:33:16Z-
Data de envio: dc.date.issued2015-04-01-
Data de envio: dc.date.issued2015-04-01-
Data de envio: dc.date.issued2002-
Fonte completa do material: dc.identifierhttp://www.repositorio.ufop.br/handle/123456789/4866-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/capes/557948-
Descrição: dc.descriptionIn this paper we report on a photoluminescent investigation of complexes involving Sm -b-diketonates with sulfoxides, phosphine oxides and amides ligands. In the synthesis of the coordination compounds we used samarium tris(thenoyltrifluoroacetonate) dehydrated precursor with the following ligands (L): DBSO and PTSO sulfoxides; TPPO phosphine oxide and (PHA) N-phenylacetamide. They have 31 31 shown high orange luminescence characteristic of the Sm ion. The emission spectra of the Sm -complexes present narrow bands 4 6 4 6 arising from the G →H (J55/ 2, 7/ 2, 9/ 2, 11/2) transitions with the hypersensitive G →H transition as a prominent group. It 5 / 2 J 5 / 2 9/ 2 4 31 is observed an efficient intramolecular energy transfer from the triplet state (T) of the ligands to the emitting G state of the Sm ion. 5 / 2 The experimental intensity parameters (h andh ) for the Sm and Eu complexes have been determined and compared. The lifetimes (t ) Sm Eu 4 of the emitting level G of the Sm-complexes are approximately 10 times higher than in the precursor compound [Sm(TTA) ?(H O) ] 5 / 2 3 2 2 indicating that radiative processes are operative in all the compounds due to the absence of multiphonon relaxation by coupling with the OH oscillators.-
Idioma: dc.languageen-
Direitos: dc.rightsO Periódico Journal of Alloys and Compounds concede permissão para depósito deste artigo no Repositório Institucional da UFOP. Número da licença: 3577170187358.-
Palavras-chave: dc.subjectSamarium-
Palavras-chave: dc.subjectLuminescence-
Palavras-chave: dc.subjectThenoyltrifluoroacetonate-
Palavras-chave: dc.subjectSulfoxides and amides-
Título: dc.titleLuminescence investigation of the Sm(III)-b-diketonates with sulfoxides, phosphine oxides and amides ligands.-
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