Synthesis, structures, and photocatalytic properties of three new nickel (II) coordination polymers containing bis(benzimidazole) ligands with different coordination architectures

Three new nickel(II) coordination polymers with the formulas of {[Ni(L)(5-HIP)]center dot H2O}(n) (1), [Ni(L)(2,6-NDC)](n) (2) and [Ni(L)(OBA)](n) (3) were synthesized under solvothermal conditions employing 1,4-bis(benzimidazol-1-yl)-2-butylene (L) and aromatic dicarboxylic acids ligands (5-H2HIP = 5-hydroxyisophthalic acid; 2,6-H2NDC = 2,6-naphthalenedicarboxylic acid; H(2)OBA = 4,4'-oxybis(benzoic acid)). 1 displays an unusual 3D (3,6)-connected framework with the Schlafli symbol of {6(3)}{6(7).8(3)}, 2 features a 3D 3-fold interpenetrated sqc6 network, 3 possesses a 2D 2-fold interpenetrated network with sql topology. 1 similar to 3 present highly photodegradation efficiency for methylene blue under UV irradiation. (C) 2020 Elsevier Ltd. All rights reserved.