Syntheses and crystal structures of three coordination polymers based on terphenyl-2,5,2,5-tetracarboxylic acid

Document Type

Article

Publication Date

9-20-2012

Abstract

Solvothermal reactions of terphenyl-2,5,2,5-tetracarboxylic acid (H 4qptc) and M II (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)(H 2O)] n (M=Co (1), Ni (2)) and [Cu(H 2qptc)(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 qptc 4 is a twisted H-shaped ligand connecting Co II 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 H 2qptc 2 are a Z-shaped ligand linking Cu II 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 H 2qptc 2. © 2012 Taylor and Francis Group, LLC.

Publication Source (Journal or Book title)

Journal of Coordination Chemistry

First Page

3205

Last Page

3215

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