Syntheses, Structures and Catalytic Properties of Cobalt(II) and Silver(I) Coordination Polymers Based on Flexible Bis(2-methyl benzimidazole) and Dicarboxylic Acids

Two coordination polymers formulated as [Co2(2,6-ndc)2(L)]n (1) and [Ag(L)(1,4-Hndc)]n (2) (L = 1,1′-(1,4-butanediyl)bis(2-methylbenzimidazole), 2,6-H2ndc = 2,6-naphthalenedicarboxylic acid, 1,4-H2ndc = 1,4-naphthalenedicarboxylic acid) were synthesized under hydrothermal conditions and characterized by IR, elemental analysis, and single-crystal X-ray diffraction. The structural analysis reveals that complex 1 exhibits an unprecedented 3D framework with threefold interpenetrating xah topology. Complex 2 shows a 1D “Ω”-like chains bridged by L ligands, which is further extended via O–H···O hydrogen bonding interactions into a 2D (4,4) supramolecular layer. The thermal stability and catalytic properties of two complexes for the degradation of Congo red dye in a Fenton-like process was also investigated.