Autor(es)

Silva, Ivan G. N. ^[1] ; Morals, Alysson F. ^[1] ; Mustafa, Danilo ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Inst Fis, BR-05508090 Sao Paulo, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Journal of Luminescence; v. 210, p. 335-341, JUN 2019.
• Citações Web of Science: 0

Resumo

The luminescence quenching in RE3+-containing materials (RE: rare earth) has a close dependence with the water content on the first coordination sphere around the activator ions. The hydration content of {[}RE(TMA)] systems (TMA = 1,3,5-benzenetricarboxylic acid) is dependent on the RE3+ ionic radius, leading to elements smaller than Gd3+ to form anhydrous matrixes. It is noteworthy that {[}Sm(TMA).6(H2O)] is hexahydrate, while {[}Y(TMA)] is anhydrous. In this work, we report the synthesis, characterization and the luminescent properties of {[}Y(TMA)] anhydrous metal organic frameworks (MOFs) serving as hosts for Sm3+ ions. The materials are synthesized by a quick and easy coprecipitation procedure in aqueous solution. Under calcination at mild conditions (starting at 500 degrees C, benzenecarboxylate method), the precursor complexes are converted into Y2O3:Sm3+ with strong Sm3+ photoluminescence. The compounds were characterized by different techniques (elemental analyses, infrared spectroscopy, thermogravimetry, powder X ray diffraction and photoluminescence). The phenomenological intensity parameters (Omega(2,4,6) ) of Sm3+ were determined by a least squares procedure based on the Judd-Ofelt theory. (AU)

• Processo FAPESP: 15/19210-0 - Hidróxidos duplos lamelares (LDH) nanoestruturados com propriedades de up e down-conversion para aplicações como sensibilizadores em células solares
• Beneficiário: Danilo Mustafa
• Modalidade de apoio: Auxílio à Pesquisa - Jovens Pesquisadores