A novel 2D sandwich layered neodymium coordination polymer based on 2,2′-bipyridyl-4,4′-dicarboxylate ligand

A new coordination polymer {[Nd(bpdc)1.5(H2O)]·H2O}n (1) based on neodymium(III) and 2,2′-bipyridyl-4,4′-dicarboxylic acid (H2bpdc) has been prepared by hydrothermal method. And it has been characterized by elemental analysis, IR spectrum, thermogravimetric analysis (TGA), single-crystal X-ray diffraction and magnetic properties. The X-ray diffraction study shows that complex 1 has a 2-D (3,4,5)-connected net with (4·62)2(43·67)2(44·62) topology. And the 2-D framework is connected by hydrogen bonds to form an unusual 3-D layered architecture. The TGA indicates that complex 1 has a good thermal stability. And the measured magnetic susceptibility reveals that a weak antiferromagnetic interaction exists in 1.