From 1-d to 3-d Supramolecular Structures Derived from Diphenic Acid and Auxiliary Ligands

Abstract

Four novel compounds [Co(Hdpa) 2(4,4′-bipy)2]n (1), {[Ni(dpa)(2,2′-bipy)(H2O)](H2O)}n, (2), [Ni(dpa)(im)3]n (3) and [Zn(dpa)(im)]n (4) [H2dpa = 2,4′-diphenyl-dicarboxylic acid, 4,4′-bipy = 4,4′-bipyridine, 2,2′-bipy = 2,2′-bipyridine and im = imidazole] were synthesized and characterized by elemental analysis, IR and single-crystal X-ray diffraction. X-ray crystallography shows that the 2,4′-diphenic acid exhibits three coordination modes to link the metal ions: μ 1 −η1: η1/μ 0 −η0: η0, μ 1−η 1: η 0/μ 2−η 1: η 1 and μ 1−η 1: η 0/μ 1−η 1: η 0. Compound 1 has a 1D supramolecular structure. Compounds 2 and 3 are 3D supramolecular structures. Compound 4 is a 2D supramolecular structure. All the compounds, 1–4, are self-assembled to form supramolecular structures through hydrogen bonding interactions.