Luminescent spherical particles of lanthanide-based infinite coordination polymers with tailorable sizes. Issue 14 (23rd March 2020)

• Record Type: Journal Article
• Authors: Arroyos, Guilherme; Frem, Regina C. G.
• Is Part Of: CrystEngComm. Volume 22:Issue 14(2020)
• Page Start: 2439
• Page End: 2446
• Publication Date: 2020-03-23
• Subjects: Crystals -- Periodicals; Crystal growth -- Periodicals; Crystallography -- Periodicals; Cristaux -- Périodiques; Cristaux -- Croissance -- Périodiques; Cristallographie -- Périodiques; 548
• DOI: 10.1039/d0ce00155d
• Languages: English
• ISSNs: 1466-8033

Abstract

Abstract : The influence of three different synthetic routes on the size and morphology of luminescent lanthanide-based infinite coordination polymers was investigated. Abstract : 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, 1 H NMR, CHN, FTIR, TGA, SEM and TEM. Photoluminescence spectroscopy was carried out to study the luminescence properties of the Eu 3+ and Tb 3+ -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.