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Nanostructures of three new cobalt(II) complexes, (CoL)·0.5DMF·1.5MeOH (1), [HL=5-(4-Carboxy phenyl azo) anthranilic acid], (Co(L))·1.5MeOH (2), [HL=5-(4-Carboxy phenyl azo) salicylaldehyde] and (Co(L))·0.5DMF·0.5MeOH (3), [HL=1-(4-Carboxy phenyl azo) 2-naphtol], have been synthesized by the reaction of HL, HL and HL with Co(OAc)·4HO through sonochemical process. Calcination of the nano-sized compounds 1-3 yield CoO nanoparticles at 450°C under air atmosphere. These nanostructures were characterized by X-ray powder diffraction (XRD) and Scanning Electron Microscopy (SEM). Thermal stability of compounds 1-3 was studied by thermogravimetric (TG) and differential thermal analyses (DTA).

Nanostructures of two new copper(II) complexes, (CuL1), 0.5EtOH. 1.5H2O (1), [H2L1=5-(4-Carboxy phenyl azo) anthranilic acid], (Cu(L2)2) (2), [HL2=1-(4-Carboxy phenyl azo) 2-naphtol] have been synthesized by the reaction of H2L1 and HL2 with Cu(OAc)2 · H2O through sonochemical process. Calcination of the nano-sized compounds 1-2 yield CuO nanoparticles at 550-450°C under air atmosphere. Metallic copper nanoparticles were prepared by direct calcination of compound 2 in surfactant at 180°C. These nanostructures were characterized by X-ray powder diffraction (XRD) and Scanning Electron Microscopy (SEM). Thermal stability of compounds 1-2 was studied by thermal gravimetric (TG) and differential thermal analyses (DTA).

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