Three new coordination polymers based on tripodal flexible ligand: Synthesis, structures and luminescent properties

Three new coordination polymers, formulated as [(CH3)2NH2]n[Zn(tci)(bpy)0.5]n (1), [Zn(Htci)(bpe)0.5]n·n(H2O) (2) and [Zn2Ca(tci)2(DMF)2]n·2n(CH3OH)·2n(DMF) (3) (H3tci = tri(2-carboxyethyl)isocyanurate, bpy = 4,4′-bipyridine, bpe = 1,2-di(4-pyridyl)ethylene, DMF = N,N′-dimethylformamide) have been hydrothermally prepared and characterized by single crystal X-ray diffraction, elemental analyses, IR spectra, and thermal analyses. Single crystal X-ray analysis reveals that compound 1 features a 2D → 3D polycatenated supramolecular structure based on rare (3,4)-connected 2D bilayers, compound 2 features a 3D pillar-layered architecture, and compound 3 represents a rare (3,6)-connected kgd topological network based on heterometallic trinuclear [Zn2Ca(COO)6] clusters. Moreover, the luminescent properties and thermal stabilities of these three compounds have also been studied.