sonochemical synthesis and characterization of nano-sized zinc(ii) coordination complex as a precursor for the preparation of pure-phase zinc(ii) oxide nanoparticles

In current study, nanoparticles and single crystals of a zn(ii) coordination complex, [zn(dmph)i2] (1), {dmph=2,9-dimethyl-1,10-phenanthroline (neocuproine)}, have been synthesized by the reaction of zinc(ii) acetate, ki and neocuproine as ligand in methanol using sonochemical and heat gradient methods, respectively. the nanostructure of 1 was characterized by scanning electron microscopy (sem), x-ray powder diffraction (xrd), ft-ir spectroscopy and elemental analyses, and the structure of compound 1 was determined by single-crystal x-ray diffraction. the thermal stability of nano-sized 1 has been studied by thermogravimetric (tg) and differential thermal analyses (dta). structural determination of compound 1 reveals the zn(ii) ion is four-coordinated in a distorted tetrahedral configuration by two n atoms from a 2,9-dimethyl-1,10-phenanthroline ligand and two terminal i atoms. the effect of supercritical condition on stability, size and morphology of nano-structured compound 1 has also been studied. the xrd pattern of the residue obtained from thermal decomposition of nano-sized compound 1 at 600 °c under air atmosphere provided pure phase of zno with the average particles size of about 31 nm.