Synthesis and physicochemical studies of some semicarbazone complexes

The Schiff base derived from 2,4-dihydroxy-5-acetylacetophenone and semicarbazide and its complexes with Ti(III), VO(IV), Cr(III), Mn(III), Fe(III), Zr(IV), MoO2(VI), and UO2(VI) ions have been synthesized. The complexes have been characterized on the basis of elemental analyses, IR, magnetic moment, electronic spectral data, and thermal analysis. Various kinetic parameters have been determined from the thermogravimetric analysis data, and decomposition follows the first-order kinetics. The solid state electrical conductivity has been measured over 313-403 K temperature range, and all the compounds showed semiconducting behavior as their conductivity increases with an increase in temperature. The ligand and its complexes have also been screened for their antimicrobial activities, and all of them were found to be active against various microorganisms.