Synthesis, characterization and Judd-Ofelt analysis of Sm3+-doped anhydrous Yttrium trimesate MOFs and their Y2O3:Sm3+ low temperature calcination products

Author(s)

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

Affiliation

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

• Document type: Journal article
• Source: Journal of Luminescence; v. 210, p. 335-341, JUN 2019.
• Web of Science Citations: 0

Abstract

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)

• FAPESP's process: 15/19210-0 - Nanostructured double layered hydroxides with up e down-conversion properties for applications as sensitizers in solar cells
• Grantee: Danilo Mustafa
• Support Opportunities: Research Grants - Young Investigators Grants