Hydrothermal synthesis, crystal structure and magnetic characterization of two 4f-3d heterometallic coordination polymers

摘要

Two new 4f-3d heterometallic coordination polymers [Gd2Co(L-1)(3)(ox)(H2O)(4)]center dot 2.5H(2)O (1, L-1 = pyridine-2,5-dicarboxylate anion, ox = oxalate dianion) and [GdNi(L-2)(2)(ox)(0.5)(H2O)(3)]center dot 3H(2)O (2, L-2 = pyridine-2,3-dicarboxylate anion) were successfully synthesized under hydrothermal conditions. In compound 1, one dimensional heterometallic and lanthanide infinite sheets were constructed with sole L1 spacers and L-1-ox mixed bridges, respectively. While similar one dimensional heterometallic infinite sheet and normal lanthanide infinite zigzag chain were formed based on sole L-2 and L-2-ox mixed bridges, respectively in compound 2. Both of the two compounds exhibited new and interesting three dimensional topologies. In addition, the magnetic properties of the two compounds were analyzed via solid-state dc magnetic susceptibility measurements.