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Sonochemical synthesis of nano lead(II) metal-organic coordination polymer; New precursor for the preparation of nano-materials.

Nano-sheets of a novel Pb(II)-based 3D metal-organic coordination polymer [Pb2 (nih)2 (NO3 )4 (CH3 OH)]n (1) were synthesized by a branched-tube method and sonochemical reaction. The synthesis was done using various times, concentrations of initial reagents, and irradiation power. The compound was characterized by scanning electron microscopy (SEM), elemental analysis, IR spectroscopy, thermogravimetric analysis (TGA), differential thermal analysis (DTA), X-ray powder diffraction (XRD), and single-crystal X-ray analysis. The X-ray analysis of the structures revealed the composition and stereochemistry of the basic building block, which had with a formula of {Pb2 (nih)2 (NO3 )4 (CH3 OH)}. These blocks are connected by covalent bonds originating from the nih and nitrate ligands and form infinite 3D metal-organic polymeric chains. The effect of triethylamine on the speed of nucleation was also investigated. Lead oxide nanoparticles were obtained by thermolysis of 1 at 180°C using oleic acid as a surfactant. The average diameter of the nanoparticles was estimated by XRD to be 36nm. The morphology and size of the PbO nanoparticles were also studied using SEM.

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