Thermal conversion of infinite coordination polymers to europium-doped yttrium oxide microspheres

Author(s)

Arroyos, Guilherme ; Frem, Regina C. G.

• Document type: Journal article
• Source: Materials Letters; v. 330, p. 4-pg., 2023-01-01.

Abstract

We report the synthesis and thermal conversion of an infinite coordination polymer (ICP) based on the pyrazole-3,5-dicarboxylate linker, malonate coordination modulator, and Y3+ metallic matrix doped with 5 % of Eu3+. The ICP particles exhibited spherical morphology and diameters between 1.0 and 3.0 mu m. Then, this sample was subjected to a calcination process in order to obtain luminescent Y2O3:Eu3+ particles with the same spherical morphology but with smaller diameters overall (<1.5 mu m). A focused ion beam (FIB) was used to slice the particles and observe their insides using SEM. While the precursor ICP particles exhibit a smooth and massive interior, the calcinated Y2O3:Eu3+ particles show internal channels and cracks due to the combustion of the organic components. The combination of excellent luminescent behavior, spherical shape, microsize, and pres-ence of internal channels can lead to multifunctional Y2O3:Eu3+ microparticles for biomedicine, photonics, and catalysis applications. (AU)

• FAPESP's process: 18/09898-3 - Infinite coordination polymers based on rare-earth ions and pyrazole-3,5-dicarboxylate: structural, morphological and luminescent properties
• Grantee: Guilherme Arroyos
• Support Opportunities: Scholarships in Brazil - Doctorate