View article

A double-T-shaped ligand (H4BPTC) and bis (2-benzimidazole) alkanes as the spacers have been firstly used to direct the assembly of a 2D coordination polymer with wavy parquet network topology,[Zn (BPTC) 0.5 (H2C2EIm)(H2O)] n (1, C24H18ZnN4O5, Mr= 507.79, H4BPTC= biphenyl-3, 3', 4, 4'-tetracarboxylic acid, H2C2EIm= 2, 2'-(1, 2-ethanediyl)-bis (1H-benzi-midazole), which was determined by single-crystal X-ray diffraction analysis. The crystal belongs to the monoclinic system, space group P21/n with a= 1.1844 (5), b= 1.4019 (5), c= 1.4026 (5) nm, β= 108.359 (5), V= 2.2104 (15) nm3, Z= 4, Dc= 1.526 g/cm3, μ (MoKα)= 1.156 mm-1, F (000)= 1040, S= 1.038, the final R= 0.0427 and wR= 0.0793 for 3834 reflections with I> 2σ (I). The compound units are linked through BPTC ligands into a wavilness parquet 2D layer and further connected into a 3D framework via π-π packing interactions between the adjacent H2C2EIm ligands and weak NH… O hydrogen bonding between uncoordinated carboxylate and the nitrogen atoms of H2C2EIm as well as the free water molecules.