Hydrothermal synthesis and characterization of ternary lanthanide-2,2'-bipyridine-3,3'-dicarboxylate coordination polymers

摘要

Two lanthanide coordination polymers,[{Ln2(bpdc)3(phen)2(H2O)2} centre dot(H2O)_6]_n(Ln = Dy(1);Ho(2))were obtained from 2,2'-bipyri-dine-3,3'-dicarboxylic acid(H2bpdc),1,10-phenanthroline(phen)and corresponding lanthanide oxides by hydrothermal synthesis.Polymers 1-2 are found to be isostructural.Single-crystal X-ray diffraction shows that 1-2 are all one-dimensional zigzag chain structures and extend to two-dimensional networks through pi-pi interactions and hydrogen bonds.Thermogravimetric analysis of 1-2 displays a considerable thermal stability.The variable-temperature magnetic susceptibility of both compounds was measured.Photoluminescence measurement indicates that 1 is a strong yellow emitter.