Syntheses, characterizations and luminescence properties of four novel coordination polymers based on 4,4′-(phenylazanediyl)dibenzoic acid with two rigid N-donor imidazol ligand

Four novel coordination polymers (CPs), namely, [ZnL(bimb)].DMF (1), [ZnL(bimb)].6(H2O)(0.5) (2), [ZnL(bimp)(0.5)].3H(2)O (3) and [ZnL(bimp)].7H(2)O (4), (H2L = 4,4'-(phenylazanediyl)dibenzoic acid, bimb = 1,4-bis(imidazol-1-yl)benzene, bimp = 3,5-bis(1-imidazoly)pyridine), have been synthesized under hydrothermal conditions with different solvents and decreased temperature rates. Their structures have been determined by single-crystal X-ray diffraction analyses and further characterized by infrared spectra (IR), elemental analyses, and thermogravimetric analyses (TGA). 1 exhibits an infinite 4-fold interpenetrated three-dimensional (3D) framework with (6(6)) topology. 2 displays the 2D undulated sheets leading to form a 3D framework with pi-pi interactions among layers in ABAB fashion. 3 exhibits an infinite 2-fold interpenetrated 3D framework with (4(12).(63)) topology. 4 exhibited 2D layer with {4(2).6(3).8} topology structure. Photoluminescence properties of 1-4 in solid state at ambient temperature were studied, too. (C) 2017 Elsevier B.V. All rights reserved.