Two low-dimensional transition metal coordination polymers constructed from thiophene-2,5-dicarboxylic acid and N/O-donor ligands: Syntheses, structures and magnetic property

摘要

Two low-dimensional transition metal coordination polymers (CPs), namely, Co(TDC)(Hdmea)(2) (1), [Mn(TDC) (5,5'-dmbpy)(H2O)](n). (2) (H2TDC = thiophene-2,5-dicarboxylic acid, Hdmea = N,N-dimethylethanolamine, 5,5'-dmbpy = 5,5'-dimethyl-2,2'-dipyridyl) have been synthesized and characterized. Compound 1 which is the first coordination compound containing the H2TDC and chelating Hdmea ligands so far features an isolated structure containing the centrosymmetric dinuclear [Co(TDC)(Hdmea)(2)](2) unit. Notably, the imidazole ligand as one of the reactants is not incorporated into the final structure of compound 1, but it is important to obtain the single crystals suitable for single-crystal X-ray diffraction analysis. Compound 2 possesses a one-dimensional (1D) zigzag chain based on the [Mn(TDC)(5,5'-dmbpy)(H2O)] building unit. In addition, the magnetic property of compound 2 is investigated.