Three coordination polymers constructed from succinic acid and 1,4-bis(1H-imidazol-4-yl)benzene: synthesis, crystal structures, and properties

Abstract

Three coordination polymers involving transition metals, namely [Co(suc)(1,4-bib)(H2O)2]n (1), [Mn(suc)(1,4-bib)(H2O)2]n (2), [Cd(suc)(1,4-bib)]n (3) (H2suc = succinic acid, 1,4-bib = 1,4-bis(1H-imidazol-4-yl)benzene), have been synthesized under solvothermal conditions. All three compounds were characterized by single-crystal X-ray diffraction, elemental analysis, FTIR, UV–Vis spectroscopy, powder X-ray diffraction and thermogravimetric analyses. Compounds 1 and 2 show 2D metal–organic layers with the point symbol of {44·62}. The 3D framework of compound 3 displays a 4-connected dia net with the point symbol of {66} topology. Magnetic susceptibility studies of compound 1 indicate weak antiferromagnetic coupling between the Co(II) centers. The adsorption experiment results show that compound 3 exhibits rapid and selective separation of congo red over methylene blue and rhodamine B.