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

Five new coordination polymers, namely [Co2(bbi)2(SO4)2] (1), [Zn2(IA)2(bbi)2] (2), [Cd(AIP)(bbi)0.5]·H2O (3), [Zn(PDC)(bbi)] (4) and [Cd(PDC)(bbi)]·2H2O (5) (H2IA = itaconic acid, H2AIP = 5-aminoisophthalic acid, H2PDC = 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 (42·68) 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.

Graphical abstractFive coordination polymers based on the bbi ligand and different carboxylates have been prepared. These compounds show fascinating 2D and 3D frameworks with various topologies.Figure optionsDownload full-size imageDownload as PowerPoint slide