Multicolor-emitting luminescent Y2O3:RE3+@SiO2-[RE3+(β-diketone)3] core@shell hybrids featuring dual RE3+ activator centers

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MetadadosDescriçãoIdioma
Autor(es): dc.contributorUniversidade Estadual Paulista (Unesp)-
Autor(es): dc.creatorCosta, André L. [UNESP]-
Autor(es): dc.creatorBispo-Jr, Airton G. [UNESP]-
Autor(es): dc.creatorLima, Sergio A.M. [UNESP]-
Autor(es): dc.creatorPires, Ana M. [UNESP]-
Data de aceite: dc.date.accessioned2022-02-22T00:26:22Z-
Data de disponibilização: dc.date.available2022-02-22T00:26:22Z-
Data de envio: dc.date.issued2020-12-11-
Data de envio: dc.date.issued2020-12-11-
Data de envio: dc.date.issued2020-11-29-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.1016/j.jallcom.2020.155811-
Fonte completa do material: dc.identifierhttp://hdl.handle.net/11449/199065-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/199065-
Descrição: dc.descriptionLuminescent inorganic-organic hybrids find several applications such as in multifunctional devices or in bioimaging. In this regard, through a step-by-step process, inorganic-organic core@shell-like hybrids based on spherically-shaped Y2O3:Eu3+@SiO2-[Tb(acac)3(Salen)] or Y2O3:Tb3+@SiO2-[Eu(dbm)3(Salen)] particles with diameter of 170 nm were fabricated from Y2O3:RE3+ (RE3+ = Eu3+ or Tb3+) coated with a layer of SiO2 (2.7 nm), that was amino-functionalized, followed by imino-functionalization to get Salen ligands to which were finally bonded to [RE(β-diketonate)3] complexes (β-diketonate = acetylacetonate, acac, or dibenzoylmethanate, dbm). The core@shell architecture of the hybrids was confirmed by X-ray diffraction, FTIR and TEM. By changing the excitation pathways, the overall emitted color of both hybrids is tuned from green (Tb3+ emission) to red spectral region (Eu3+ emission), crossing the white color emission region due to the combination of the Eu3+, Tb3+ and Salen emissions. As an additional and interesting find, no energy transfer from the RE3+ in the core to the other RE3+ on the particle surface takes place, avoiding the quenching of both RE3+ luminescence. Therefore, the high 5D0 state quantum efficiency of Eu3+ (68%) and the multicolor emission qualify the hybrids for future photonic applications in multifunctional devices or in bioimaging.-
Descrição: dc.descriptionCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)-
Descrição: dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)-
Descrição: dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)-
Descrição: dc.descriptionSão Paulo State University (Unesp) School of Technology and Sciences-
Descrição: dc.descriptionSão Paulo State University (Unesp) Institute of Biosciences Humanities and Exact Sciences-
Descrição: dc.descriptionSão Paulo State University (Unesp) Institute of Chemistry-
Descrição: dc.descriptionSão Paulo State University (Unesp) School of Technology and Sciences-
Descrição: dc.descriptionSão Paulo State University (Unesp) Institute of Biosciences Humanities and Exact Sciences-
Descrição: dc.descriptionSão Paulo State University (Unesp) Institute of Chemistry-
Descrição: dc.descriptionFAPESP: 2016/20421-9-
Idioma: dc.languageen-
Relação: dc.relationJournal of Alloys and Compounds-
???dc.source???: dc.sourceScopus-
Palavras-chave: dc.subjectcore@shell-
Palavras-chave: dc.subjectHybrids-
Palavras-chave: dc.subjectLuminescence-
Palavras-chave: dc.subjectRare earth-
Palavras-chave: dc.subjectSelective excitation-
Título: dc.titleMulticolor-emitting luminescent Y2O3:RE3+@SiO2-[RE3+(β-diketone)3] core@shell hybrids featuring dual RE3+ activator centers-
Tipo de arquivo: dc.typelivro digital-
Aparece nas coleções:Repositório Institucional - Unesp

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