Infinite 3D cadmium(II)-azido coordination polymer: Sonochemical syntheses,structural characterization and use as a precursor to nanoscale CdO

Abstract

A Nano flower comprising a 3D Cd(II) coordination polymer, [Cd₂(pcih)(N₃)₃(CH₃OH)]_n (1), (pcih = 2-pyridinecarbaldehyde isonicotinoylhydrazonate), has been synthesized by a sonochemical process and characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), FT-IR spectroscopy and elemental analyses. Single crystalline material was obtained using a heat gradient applied to a solution of the reagents. Structural determination of compound 1 reveals two Cd(II) atoms with different coordination numbers. The structure may be considered a coordination polymer containing the Cd-(μ₂-1,1), Cd-(μ₃-1,1,1) and Cd-(μ₃-1,1,3) motifs, formed of three-dimensional chains. The strong π - π stacking interactions cause individual molecules to self-assemble to form a compressed supramolecular 3D network. Phase pure CdO nanoparticles were obtained by thermolysis of 1 in oleic acid at 180°C under an air atmosphere. The CdO nanoparticles were characterized by XRD and SEM.

Keywords

Nano flower cadmium (II)3D coordination polymer sonochemical nano CdO

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