1365548-78-2Relevant academic research and scientific papers
Syntheses and crystal structures of three coordination polymers based on terphenyl-2,5,2,5-tetracarboxylic acid
Zhang, Xiutang,Fan, Liming,Sun, Zhong,Zhang, Wei,Li, Dacheng,Wei, Peihai,Li, Bin,Dou, Jianmin
, p. 3205 - 3215 (2012)
Solvothermal reactions of terphenyl-2,5,2,5-tetracarboxylic acid (H 4qptc) and MII (M=Co, Ni, Cu) in the presence of 2,2-bipyridine (2,2-bpy) afford three new coordination polymers, [M(qptc) 0.5(2,2-bpy)(H2O)]n (M=Co (1), Ni (2)) and [Cu(H2qptc)(2,2-bpy)]n (3). The structures have been determined by single-crystal X-ray diffraction analyses and further characterized by elemental analyses, IR, and TGA. Complexes 1 and 2 are isostructural and display a 2-D layer wherein qptc4 is a twisted H-shaped ligand connecting CoII centers. Furthermore, 3-D structures in 1 and 2 are formed via inter-chain interactions between neighboring 2,2-bpy ligands, with the centroid-centroid distances of 3.619-3.822. In 3, two deprotonated carboxyl groups of H2qptc2 are a Z-shaped ligand linking CuII centers to a 1-D zigzag polymeric chain. A 2-D layer structure is built with the help of inter-chain interactions between the 2,2-bpy and H2qptc2.
