Abstract
Two new coordination polymers [Ni(2,4′-oba)(1,10-phen)]n (1) and {[Ni(2,4′-Hoba)2 (4,4′- bipy)(H2O)2]·2H2O} n (2) have been synthesized [2,4′-H2oba=2-(4-carboxyphenoxy)benzoic acid, 1,10-phen=1,10-phenanthroline and 4,4′-bipy=4,4′-bipyridine]. 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. In compounds 1 and 2, the oba2− ligands exhibit two coordination modes to link metal ions: bidentate chelating and monodenate modes.
Acknowledgments
The authors gratefully acknowledge financial support from the National Natural Science Foundation of China (20971018) and also the support from Dezhou University.