Syntheses, Structures, and Catalytic Properties of Two 2D Manganese(II) Coordination Polymers Containing Flexible Bis(benzimidazole) Ligands
Two MnII coordination polymers based on the flexible bis(benzimidazole) and dicarboxylic acids, namely, [Mn(L1)(bpdc)(H2O)0.5]n (1) and [Mn(L2)(Htbi)2]n (2) [L1 = 1,4-bis(5,6-dimethylbenzimidazol-1-ylmethyl)benzene, H2bpdc = 4,4′-biphenyldicarboxylic acid, L2 = 1,4-bis(5,6-dimethylbenzimidazole)butane, H2tbi = 5-tert-butyl isophthalic acid] were hydrothermally synthesized and characterized by elemental analysis, IR spectroscopy, as well as single-crystal X-ray diffraction. Both of the complexes crystallize in the triclinic P space group and present distorted octahedral configurations. Complex 1 possesses a 2D binodal (3,5)-connected 3,5L2 network with the point symbol of (42.67.8)(42.6), whereas 2 features a 2D uninodal 3-connected hcb topology and the Schlafli symbol is (63). Complexes 1 and 2 ultimately are extended into 3D supramolecular framework via π–π stacking and O–H···O hydrogen bonding interaction, respectively. Moreover, both of the complexes manifest excellent catalytic activities for the degradation of Congo red.