Influence of synthetic conditions on the formation of thermally and hydrolytically stable Sc-based metal–organic frameworks

Abstract

Three new coordination polymers ((CH3)2NH2)[Sc(H2O)2(fdc)2]·1,5CH3CN (1), ((CH3)2NH2)2[Sc(fdc)2(HCOO)] (2), [Sc2(H2O)2(fdc)3] (3) based on scandium cations and 2,5-furandicarboxylate ligand (fdc2−) have been synthesized and characterized by single crystal and powder X-ray diffraction crystallography, TG, elemental analyses and IR-spectroscopy. Compound 1 is formed from layers bind by hydrogen bonds. Calculated accessible for solvent volume is 41%. Compound 2 is a structure of negatively charged layers connected with interlayer dimethylammonium cations. Layered compound 3 appeared to be thermally stable (up to 300 °C) and retain its structure in wide range of pH from 1 to 13. Additionally, the solid-state luminescence properties of compounds 2 and 3 we investigated.