New Flower-Shaped Lead(Ⅱ) Coordination Polymer at the Nano Scale: Synthesis, Structural Characterization and DFT Calculations of [Pb(o-phen)(N_3)_2]n Containing the Pb-(μ_1,1-N_3)(μ_1,3-N_3) Motif

摘要

A new nano-flower lead(Ⅱ) azido coordination polymer from the ligand, orthophenanthroline (o-phen), [Pb(o-phen)(μ_(1,1)-N_3)(μ_(1,3)-N_3)]_n (1), was synthesized by a sonochemical method. Compound 1 was characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), elemental analyses and IR spectroscopy. Single crystalline material was obtained using a heat gradient applied to a solution of the reagents. The structure of 1 is a coordination polymer of lead(Ⅱ) containing the Pb-(μ_(1,1)N_3) (μ_(1,3)-N_3) motif, formed of one-dimensional chains. The structure of the 1 was optimized by density functional theory. Structural parameters and IR spectra for 1 are consistent with the crystal structure. Pure phase PbO nanoparticles were obtained by thermolysis of 1 with oleic acid as a surfactant at 180 and 200 ℃ an air. PbO nanoparticles were characterized by XRD and SEM.