Four Flexible Bis(Thiabendazole)-Based Cd(II) Coordination Polymers with Various Aromatic Carboxylates: Syntheses, Structures and Properties

Four Cd(II) coordination polymers (CPs) including [Cd(btbb)(0.5)(L1)] (n) (1), [Cd(btbb)(L2)center dot(H2O)(1.5)] (n) (2), [Cd(btbb)(L3)] (n) (3), and [Cd(btbb)(HL4)] (n) (4) (btbb = 1,4-bis(thiabendazole)butane, H(2)L1 = 5-hydroxyisophthalic acid, H(2)L2 = 4,4'-biphenyldicarboxylic acid, H(2)L3 = tetrabromoterephthalic acid, H(3)L4 = 5-nitro-1,2,3-benzenetricarboxylic acid) were prepared under hydrothermal conditions based on flexible bis(thiabendazole) ligand and different co-carboxylates. Their structures have been determined by single-crystal X-ray diffraction analyses, elemental analyses, IR spectra, X-ray powder diffraction, and thermogravimetric analyses. CP 1 exhibits a 3D 2-nodal (3,4)-connected framework with the 3,4T10 topology. CP 2 and 3 feature typical hcb layer structure, and 3 is further combined into a 3D supramolecular architecture through C-Hai<overline>O hydrogen bonds. CP 4 possesses an infinite chain and further extended into 2D supramolecular network by O-HaiO hydrogen-bonding interactions. The effects of the aromatic polycarboxylate co-ligands on the CPs framework have been discussed and the catalytic activities of CPs 1-4 for degradation of methyl orange in Fenton-like process are also investigated.