Hydrothermal Synthesis, Characterization of Mn(II) and Cd(II) Coordination Polymers Assembled from Semi-Rigid Oxo-Bridged Carboxylate and N-Donor Ligands

Two new metal–organic coordination polymers containing Mn(II) and Cd(II) with oxo-bridged and N-donor ligands, [Mn(oba)(2,2′-bipy)]n (1) and {[Cd(oba)(bib)]·H2O}n (2) [2,3′-H2oba = 2-(3-carboxyphenoxy)benzoic acid, 2,2′-bipy = 2,2′-bipyridine, and bib = 4,4′-bis(2-methylimidazole-1-ylmethyl)biphenyl], have been prepared and characterized by elemental analysis, Fourier infrared spectroscopy, and X-ray diffraction. Complex 1 has a 3D supramolecular network constructed from 1D zigzag chain via π–π stacking interactions. Complex 2 features 1D ladder-like chain which consists of 1D helical arrays and bib pillars. Moreover, photoluminescence properties of the bib ligand and the Cd(II) complex were investigated.