Five new coordination polymers constructed from 1,4-bis(1H-imidazol-1-yl) butane and different carboxylates: Syntheses, structures and photoluminescence

摘要

Five new coordination polymers, namely [Co_2(bbi) _2(SO_4)_2] (1), [Zn_2(IA) _2(bbi)_2] (2), [Cd(AIP)(bbi)_(0.5)]·H _2O (3), [Zn(PDC)(bbi)] (4) and [Cd(PDC)(bbi)]·2H_2O (5) (H_2IA = itaconic acid, H_2AIP = 5-aminoisophthalic acid, H_2PDC = pyridine-2,3-dicarboxylic acid and bbi = 1,4-bis(1H-imidazol-1-yl)butane, have been hydrothermally synthesized and characterized by single-crystal X-ray diffraction. The X-ray crystallographic studies of 1 and 5 reveal 3D threefold interpenetrating diamondoid architectures. Compound 2 displays a diamondoid topology. Compound 3 shows a 3D five-connected (4~2·6~8) net. Compound 4 displays an undulating layer structure, where the layers are further stacked by π-π interactions to generate a 3D supramolecular architecture. The photoluminescent behaviors of 2-5 have also been investigated.