Thermal, vibrational and optical properties of PrLuO3 interlanthanides from hydrothermally-derived precursors

Autor(es)

Soares, Julia C. ; Siqueira, Kisla P. F. ; de Sousa Filho, Paulo C. ; Moreira, Roberto L. ; Dias, Anderson

• Tipo de documento: Artigo Científico
• Fonte: DALTON TRANSACTIONS; v. 46, n. 3, p. 825-835, 2017.
• Citações Web of Science: 2

Resumo

PrLuO3 interlanthanides were prepared at temperatures ranging from 800 degrees C to 1600 degrees C using hydro-thermally- derived precursors. The chemical reactions observed include the conversion and segregation of Pr(OH)(3) and LuO(OH), respectively, into PrO2 and Lu2O3 cubic oxides below 1200 degrees C, followed by the production of a mixture of hexagonal P6(3)/mmc and orthorhombic Pnma PrLuO3 phases at 1400 degrees C. Phasepure orthorhombic PrLuO3 was obtained at 1600 degrees C, which was corroborated by Raman and micro farinfrared spectroscopic analyses. Photoluminescence, colorimetric and lifetime measurements were carried out in PrLuO3 samples. Dominant emission verified in samples calcined at 1400 degrees C corresponds to the hypersensitive P-3(0) -> F-3(2) transition with a color purity of 97% (decay times of 12 mu s and 3 mu s), while emissions for the phase-pure samples correspond to the P-3(0) -> H-3(6) and P-3(0) -> H-3(5) transitions with a color purity of 94% (a single luminescence lifetime of 12 mu s). The optical properties of PrLuO3 interlanthanides thereby suggest that they can be used as luminescent materials in both structural arrangements. (AU)

• Processo FAPESP: 13/01669-1 - Luminóforos nanoestruturados e sistemas core@shell contendo terras raras: aplicações em marcação biológica, iluminação e visualização
• Beneficiário: Paulo Cesar de Sousa Filho
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado