A Cu~(II)-Gd~(II)-Cu~(II) heterometallic coordination polymer constructed by gadolinium(III) ion and copper(II) Schiff-base building block: Structure and magnetic property

摘要

A new 3d-4f heterometallic coordination polymer |Gd(H2O)3{NO3~-)(CuL)2] ·H2O (1) (H3L = glycylglycine, N-[1-(2-hydroxy, phenyl)-propylidene]) has been synthesized and characterized by IR, elemental analysis, TGA and X-ray single-crystal diffraction. In the coordination polymer, two metallo-ligand CuLs are connected with Gd~(3+) ion to form a 1-D chain via carboxylate and carbonyl oxygen. The neighboring Cu-Gd-Cu chains are further connected by hydrogen bonds to form a two-dimensional structure. Magnetic studies for 1 reveal that ferromagnetic interactions (J_(CuGd) = 1.30 cm~(-1)) between Cu(II) and Gd(III) centers are operating within the Cu~(II)-Gd~(III)-Cu~(II) systems.