The Influence of Different Ammonium Cations on the Optical Properties of Tetrakis Gd-III and Eu-III Complexes

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dc.contributor.authorAdati, Renata D. [UNESP]
dc.contributor.authorMonteiro, Jorge H. S. K. [UNESP]
dc.contributor.authorCardoso, Lucas P.
dc.contributor.authorOliveira, Daniel H. de
dc.contributor.authorJafelicci Jr, Miguel [UNESP]
dc.contributor.authorDavolos, Marian R. [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionUniv Tecnol Fed Parana UTFPR
dc.date.accessioned2019-10-04T12:39:42Z
dc.date.available2019-10-04T12:39:42Z
dc.date.issued2019-08-01
dc.description.abstractA series of tetrakis-beta-diketonate Q(+)[Ln(beta-dik)(4)](-), where Ln = Gd-III or Eu-III, Q = ammonium cations and beta-dik = tta (2-thenoyltrifluoracetone) or bmdm (1 -(4-tert-butylphenyl)-3-(4-methoxyphenyl)-1,3-propanedione) have been synthesized and characterized. The environment surrounding the Eu-III ion depends on the lateral groups of the ligand and on the alkyl chains of the counter ion Q. The shortest lifetime (tau) = 0.29 ms, and lowest quantum efficiencies (eta) = 24%, were obtained for (N(C12H25)(2)(CH3)(2))(+)[Eu(bmdm)(4)](-). while (N(C4H9)(4))(+)[Eu(bmdm)(4)](-) has the longest tau = 1.04 ms and eta = 90%. The Judd-Ofelt intensity parameters (Omega(2) and Omega(4)) strongly changes for tta series pointing to stronger ion-dipole interactions between the -CF3 group with the ammonium cations. The agreement between the experimental results of photoluminescence and theoretical data suggests that the geometries optimized by the Sparkle model are correct. These results point to potential candidates for building up Langmuir-Blodgett (LB) luminescent films, since it is possible to maximize the intermolecular interactions and the photoluminescent properties of tetrakis Ln(III) complexes.en
dc.description.affiliationUniv Estadual Paulista, UNESP, Inst Quim, Lab Mat Luminescentes,Dept Quim Geral & Inorgan, BR-14800060 Araraquara, SP, Brazil
dc.description.affiliationUniv Tecnol Fed Parana UTFPR, Dept Quim & Biol, BR-81280340 Curitiba, Parana, Brazil
dc.description.affiliationUnespUniv Estadual Paulista, UNESP, Inst Quim, Lab Mat Luminescentes,Dept Quim Geral & Inorgan, BR-14800060 Araraquara, SP, Brazil
dc.description.sponsorshipCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
dc.description.sponsorshipConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.format.extent1707-1716
dc.identifierhttp://dx.doi.org/10.21577/0103-5053.20190073
dc.identifier.citationJournal Of The Brazilian Chemical Society. Sao Paulo: Soc Brasileira Quimica, v. 30, n. 8, p. 1707-1716, 2019.
dc.identifier.doi10.21577/0103-5053.20190073
dc.identifier.fileS0103-50532019000801707.pdf
dc.identifier.issn0103-5053
dc.identifier.scieloS0103-50532019000801707
dc.identifier.urihttp://hdl.handle.net/11449/185927
dc.identifier.wosWOS:000476620200015
dc.language.isoeng
dc.publisherSoc Brasileira Quimica
dc.relation.ispartofJournal Of The Brazilian Chemical Society
dc.rights.accessRightsAcesso aberto
dc.sourceWeb of Science
dc.subjecttetrakis-beta-diketonate
dc.subjectammonium cations
dc.subjectphotoluminescent properties
dc.subjectsemi-empirical methods
dc.subjecteuropium
dc.titleThe Influence of Different Ammonium Cations on the Optical Properties of Tetrakis Gd-III and Eu-III Complexesen
dc.typeArtigo
dcterms.rightsHolderSoc Brasileira Quimica

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Artigos - Química Inorgânica - IQ