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 [Cd-3(mbdc)(3)(Hdatrz)](n) (1), [Cd-2(pbdc)(1.5)(datrz)(2)(H2O)(2)(DMA)](n) (2) and [Cd-2(L)(Hdatrz)(2)(H2O)(2)](n) (3) (H(2)mbdc = 1,3-benzenedicarboxylic acid, Hdatrz = 3,5-diamino-1,2,4-triazole, H(2)pbdc = 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 [Cd-2(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.