Organic Carboxylate Ligands Tuned Structural Variations of Three New Cd(II) Coordination Polymers with Guanazole as Co-ligand

Three new Cd(II) coordination polymers, namely [Cd3(mbdc)3(Hdatrz)]n (1), [Cd2(pbdc)1.5(datrz)2(H2O)2(DMA)]n (2) and [Cd2(L)(Hdatrz)2(H2O)2]n (3) (H2mbdc = 1,3-benzenedicarboxylic acid, Hdatrz = 3,5-diamino-1,2,4-triazole, H2pbdc = 1,4-benzenedicarboxylic acid, H4L = 1,2,3,4-cyclopentanetetracarboxylic acid, DMA = N,N′-dimethylacetamide), have been prepared via a mixed-ligand self-assembly strategy. Single crystal X-ray structural analyses reveal that compound 1 features a 3D framework based on two different building subunits: 1D –{Cd–COO–Cd}n– chain substructures and paddle-wheel shaped dinuclear [Cd2(COO)4] subunits, compound 2 features a 3D framework based on 1D –{Cd-datrz-Cd}n– chain substructures, and compound 3 displays a 3D supramolecular framework directed by intermolecular hydrogen bonds. Moreover, the thermal stabilities and luminescent properties of these three compounds were also investigated.