Assembly of two Cu-based coordination polymers from 2-(pyridine-3-yl)-1H-4,5-imidazoledicarboxylate ligand

Two novel Cu-based coordination polymers [Cu-5(HPyImDC)(4)]center dot(NH4)(3) (1) and [Cu-3(H2O)(2)(HPyImDC)(2) (C3N2H10)] (2) containing the 2-(pyridine-3-yl)-1H-4,5-imidazoledicarboxylate (H(3)PyImDC) ligand have been solvothermally synthesized. Single crystal X-ray diffraction analysis reveals that compound 1 exhibits a three dimensional framework with 1D rhombic channels, which can be simplified into a novel (3,4)-connected network with Schlafli symbol of (6(2).14(4))(6(2).8)(4). Compound 2 is one dimensional chain which packed with each other via n it and hydrogen-bonding interactions to construct a three dimensional supramolecular structure. As the first example related to Cu (I) and Cu (I, II) coordination polymers based on H(3)PyImDC ligands, compounds 1 and 2 are further studied by elemental analyses, IR spectroscopy and thermogravimetric analyses. (C) 2015 Elsevier B.V. All rights reserved.