Transition Metal Complexes of 3,5-Dihydroxy-2-naphthoic Acid and its Nano Metal Oxides: Synthesis and Characterization

Abstract

Synthesis of Cd(II), Cu(II), Mn(II) and Zn(II) complexes are achieved by adding hydrazine hydrate and 3,5-dihydroxy-2-naphthoic acid in the ratio 1:4 to the corresponding metal nitrates. The synthesized complexes are characterized by elemental analysis, IR, UV, TG-DTA and XRD analysis. The nano metal oxides are obtained by decomposing the complexes at 800 °C in the muffle furnace. The nano metal oxides are characterized by IR and XRD studies. The surface morphology and quantative analysis of metal oxides were determined by using SEM analysis. The shape of nano zinc oxide is rock like hexagonal structure while that of nano Mn oxide is rod like structure which was confirmed by transmission electron microscopy analysis.

Design and synergistic effect of nano-sized epoxy-NiCo2O4nanocomposites for anticorrosion applications

“…The broader band at 334 nm corresponds to the 1 A 1g / 1 A 2g transition for the Ni(II) ion, and the bands at 426 nm and 511 nm correspond to the 1 A 1g / 1 T 2g and 1 A 1g / 1 T 1g transitions, respectively for the Co(II) metal ion. 26,27 The absorption bands for the mixed metal oxide were observed at 243 nm for NiO and 364 nm for CoO. Two bands were observed because of the scattering from the nano metal oxide constituents of different sizes in the composite, resulting from the individual oxide phases.…”