A series of novel 2D heterometallic 3d–4f heptanuclear complexes based on the linkages of Ln2(ina)6 chains and [Cu(CN)] chains

Abstract

Five novel 2D heterometallic coordination polymers, Ln2Cu5(ina)6(CN)5.5·4H2O [Ln = Nd (1), Eu (2), Tb (3), Gd (4), Sm (5); ina = isonicotinic acid], have been synthesized under hydrothermal conditions and characterized by elemental, infrared, thermogravimetric and X-ray diffraction analyses. These complexes are constructed of Ln2(ina)6 chains, Cu–CN–Cu, and CN–Cu–CN chains, which represent the first examples of 3D coordination compounds created by using a combination of metal–cyanide chains, lanthanide–carboxylate linear chains and O–H⋯N hydrogen bonds.