Construction, crystal structure, and properties of Ni(II) coordination polymer based on p-terphenyl-3, 2′, 5′, 3"-tetracarboxylate ligand

Using p-terphenyl-3,2',5',3 ''-tetracarboxylic acid (H(4)tptc) as the main ligand, nitrogen-containing ligand phen (phen =1, 10-phenanthroline) as auxiliary ligand, self-assembly with transition metal nickel(II) salt under hydrothermal conditions, a novel coordination polymer {[Ni-2(tptc)(phen)(2)(H2O)(6)]center dot dioxane center dot 2H(2)O} (1) was prepared and its structure was characterized by elemental analysis, IR, powder diffraction analysis, X-ray diffraction, and so on. Structural analysis shows that 1 has a binuclear structure, which is further expanded into a 3D supramolecular network through O-H center dot O hydrogen bonds, and pi-pi stacking contributes to the further stabilization of crystal packing. The studies of photocatalytic properties show that 1 can be used as photocatalyst to achieve efficient removal of methyl orange (MB) in the aqueous phase under ultraviolet (UV) irradiation. In addition, the electrocatalytic studies showed that the OER performance of 1@NF electrode was better than RuO2@NF and the HER performance was better than Pt/C@NF, with Tafel slopes of 12.5 mV dec(-1) and 37.2 mV dec(-1), respectively. The above results show 1 is a good multifunctional material, which can solve the problems of environmental pollution and energy shortage. [GRAPHICS] .