Synthesis, Structures, and Catalytic Properties of Two ­Cobalt(II) Coordination Polymers Based on 5-Substituted Isophthalate and Flexible Bis(benzimidazole) Co-ligands


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Two new CoII coordination polymers, [Co(L1)0.5(hip)]n (1) and [Co(L2)(mip)·2H2O]n (2) [L1 = 1,1′-(1,4-butanediyl)bis-1H-benzimidazole, L2 = 1,3-bis(5,6-dimethylbenzimidazol-1-yl)-2-propanol, H2hip = 5-hydroxyisophthalic acid, H2mip = 5-methylisophthalic acid], were synthesized under hydrothermal conditions and structurally characterized by elemental analysis, IR spectroscopy, and X-ray single-crystal diffraction. Complex 1 exhibits a 3D supramolecular network constructed with 2D (4,4) layer by O–H···O hydrogen bonding. Complex 2 has 1D ladder-like chains, which are further assembled into a 3D supramolecular framework by π–π stacking interactions. In addition, fluorescence and catalytic properties of compounds 1 and 2 were investigated in solid state.