Sonochemical synthesis of nanoscale mixed-ligands lead(II) coordination polymers as precursors for preparation of Pb2(SO4)O and PbO nanoparticles; thermal, structural and X-ray powder diffraction studies

Nano-structures of two new Pb(II) two-dimensional coordination polymers, [Pb(μ-4-pyc)(μ-NCS)(μ-H2O)]n (1) and [Pb(μ-4-pyc)(μ-N3)(μ-H2O)]n (2), 4-Hpyc = 4-pyridinecarboxylic acid were synthesized by a sonochemical method. The new nano-structures were characterized by scanning electron microscopy, X-ray powder diffraction, IR spectroscopy and elemental analyses. Compounds 1 and 2 were structurally characterized by single crystal X-ray diffraction and consist of two-dimensional polymeric units. The thermal stability of compounds 1 and 2 were studied by thermal gravimetric and differential thermal analyses and compared. Pb2(SO4)O and PbO nanoparticles were obtained by calcination of the nano-structures of compounds 1 and 2 at 600 °C, respectively.