Synthesis, structures, and catalytic properties of two silver(1) coordination polymers constructed from 1,4-bis(benzimidazolyl)butane

摘要

Using a hydrothermal synthesis method, two silver(1) complexes, [Ag(bbbm)(1,3-HBDC)]~n (1) and [Ag(bbbm)(1,2-HBDC)]~n (2) (bbbm = 1,1'-(1,4-butanediyl)bis-1H-benzimidazole, 1,3-H2BDC = 1,3-benzenedicarboxylic acid, 1,2-H2BDC = 1,2-benzenedicarboxylic acid), have been synthesized and characterized by elemental analysis, IR spectra, thermogravimetric (TG) analysis and singlecrystal X-ray diffraction. The silver centers display different environments with a distorted T-shaped geometry in 1, and a linear geometry in 2. Both chain structures of 1 and 2 are bridged by bbbm in a bis-monodentate coordination mode. 1 is further linked to generate a 3D supramolecular architecture via Π-Π stacking interactions and intermolecular O-H...O hydrogen bonding. In 2, the ribbon-like chains are additionally assembled by two Π-Π stacking modes to form a layer motif. The photoluminescence of 1 and 2 was investigated in the solid state. 1 and 2 possess a remarkable activity for degradation of methyl orange by persulfate in a Fenton-like process.