Syntheses, structures, and properties of zinc(II) and copper(II) coordination polymers with imidazole-containing ligands

Abstract

Abstract The reactions of Zn(NO 3 ) 2 · 6H 2 O/CuCl 2 · 2H 2 O and 1,4-bis(1-imidazolyl)benzene (bib)/1,4-bis(1-imidazol-1-ylmethyl)benzene (biyb), carried out under hydrothermal conditions, produced two new coordination polymers [Zn(bib)(HCOO) 2 · H 2 O] ( 1 ) and [Cu(biyb)Cl 2 ] ( 2 ), respectively, which were characterized by elemental analysis, infrared spectroscopy, thermogravimetric analyses, and single-crystal X-ray diffraction. In complex 1 , the Zn II centers are bridged by bib ligands to form a chain, where the adjacent chains are condensed by strong intermolecular O–H · · · O hydrogen-bonding and aromatic π-π stacking interactions to generate a 3D supramolecular structure. In 2 , the Cu II centers are bridged by biyb ligands to form, again, chains through C–H · · · Cl hydrogen bonds, and these adjacent chains with different orientations are joined to generate a 3D supramolecular structure.