A new 2D Hg~(II) coordination polymer containing novel coordination mode of 2,5-bis(4-pyridyl)-1,3,4-oxadiazole (bpo) ligand,[Hg(mu-bpo)2-(N3)2]n: Spectroscopic,thermal,fluorescence and structural studies

摘要

A new two-dimensional Hg~(II) coordination polymer containing 2,5-bis(4-pyridyl)-1,3,4-oxadiazole (bpo) and azide anions,[Hg(mu-bpo)2(N3)2]n,has been synthesized and characterized by elemental analysis,IR-,1H NMR-,13C NMR spectroscopy and structurally determined by X-ray single-crystal diffraction.The thermal stability of compound [Hg(mu-bpo)2(N3)2]n was studied by thermal gravimetric (TG) and differential thermal analyses (DTA).The single-crystal X-ray data shows that ligand bpo is bridged via one pyridyl nitrogen and one oxadiazole nitrogen atom,as a novel coordination mode of the ligand bpo.Furthermore,the ligand and complex are luminescent in the solid state,with emission maxima in the visible light region (lambda_(max) = 470 nm for both bpo and [Hg(mu-bpo)2(N3)2]n).