Synthesis and Characterization of Three Diverse Coordination Frameworks under Co-ligand Intervention

摘要

The chelating organic ligands of 2,2'-bipyridine (2,2'-bipy), di(pyrid-2-yl)amine (dpa) and 2,6-di(pyrid-2-yl-arnino)pyridine (dpap) were respectively applied to react with H2fum (fumaric acid) and copper salts, affording penta-coordinated Cu(Ⅱ) ion exhibits a distorted trigonal bipyramidal geometry in 1. The fum ligand links copper ions to form a dinuclear copper unit. While in 2, the fum ligands connect [Cu2(μ-OH)2(dpa)2] unit to construct a ID zigzag chain. Unexpectedly, when dpap instead of dpa was used under the same conditions, only one mononuclear complex 3 was formed. Crystal packings show that 1-3 form 3D supramolecular architectures through magnetic property reveals dominating ferromagnetic interactions between Cu(Ⅱ) atoms in 1.