Hydrothermal Synthesis of Metal–Organic Coordination Polymers Constructed from Asymmetric Semi-rigid V-shaped Dicarboxylate and Nitrogen-Contained Mixed Ligands

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Three new coordination polymers, [Ni(2,4′-oba)(1,10-phen)] n (1), {[Ni (2,4′-Hoba)2(4,4′-bipy)(H2O)2]·2H2O} n (2) and [Zn(2,4′-oba) (4,4′-bipy)] n (3) (2,4′-H2oba = 2-(4-carboxyphenoxy)benzoic acid, 1,10- phen = 1,10-phenanthroline, and 4,4′-bipy = 4,4′-bipyridine) have been obtained by hydrothermal synthesis. The framework structures of these polymeric complexes have been determined by single-crystal X-ray diffraction studies. Complex 1 exhibits double-helical chains formed by π–π stacking interactions from the phenyl rings of the 1,10-phen ligands. Complex 2 forms a two-dimensional supramolecular architecture directed by hydrogen bonding. Complex 3 exhibits a three-dimensional structure; Schlafli symbol of {44·610·8}. The luminescent property of compound 3 is discussed.