A 3D SUPRAMOLECULAR POLYMER INVOLVING HYDROGEN BONDS BASED ON NICKEL(II), 1,3-BENZENEDICARBOXYLIC ACID, AND A NITROGEN-CONTAINING LIGAND

The [Ni(1,3-bdc)(L)(H 2 O) 2 ] n ·2 n H 2 O ( 1 ) coordination polymer (1,3-H 2 bdc = 1,3-benzenedicarboxylic acid, L = 4,4′-N,N′-bis(3-pyridylformamide)diphenyl ether) is hydrothermally synthesized and structurally characterized by single crystal X-ray diffraction and UV-Vis spectroscopy. The single crystal X-ray diffraction analysis reveals that each nickel(II) atom is six-coordinated with one 1,3-bdc anion, one L ligand, two coordinated and two free water molecules. The one-dimensional chain of complex 1 is formed by Ni metal and mixed ligands with a Ni⋯Ni distance of 7.780 Å. Furthermore, the existence of strong hydrogen bonding between chains and layers forms a final three-dimensional supramolecular structure. The UV-Vis spectroscopy of the title complex is briefly investigated. Thermal behavior is also examined.