Luminescent spherical particles of lanthanide-based infinite coordination polymers with tailorable sizes

Autor(es)

Arroyos, Guilherme ^[1] ; Frem, Regina C. G. ^[1]

Afiliação do(s) autor(es)

^[1] Sao Paulo State Univ, Inst Chem, UNESP, BR-14800060 Araraquara, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: CrystEngComm; v. 22, n. 14, p. 2439-2446, APR 14 2020.
• Citações Web of Science: 0

Resumo

Infinite coordination polymers (ICPs) are compounds usually obtained as spherical particles exhibiting amorphous phases in powder X-ray diffraction patterns. In the present work, we report an ICP system based on rare-earth ions with pyrazole-3,5-dicarboxylate as a linker and malonate as a coordination modulator. The compounds exhibit a 2D MOF structure. Three different synthetic routes were used, namely microwave-assisted, solvothermal and gel diffusion. The syntheses yield single-phase spherical particles, which were characterized by PXRD, H-1 NMR, CHN, FTIR, TGA, SEM and TEM. Photoluminescence spectroscopy was carried out to study the luminescence properties of the Eu3+ and Tb3+-based samples. With the different-sized particles obtained, we could elucidate the intricate microstructure of the spheres and propose a reason behind the observed amorphous phases in the PXRD patterns. (AU)

• Processo FAPESP: 18/09898-3 - Polímeros de coordenação infinitos baseados em íons terras-raras e pirazol-3,5-dicarboxilato: propriedades estruturais, morfológicas e luminescentes
• Beneficiário: Guilherme Arroyos
• Modalidade de apoio: Bolsas no Brasil - Doutorado