Abstract
The new synthesized compounds were characterized using; spectral (mass, IR, UV-Vis, XRD) and analytical (elemental, molar conductance and magnetic moment measurements) tools. The geometrical structures of Co(II) complexes were found to be in tetrahedral configuration. SEM/EDX/TEM images showed nano-sized particles and identical distribution over the complex surface. The catalytic activities of the divalent cobalt complexes have been studied in the oxidation of cyclohexane, using environmental friendly oxidant, hydrogen peroxide. Complex with rough surface has shown higher catalytic activity compared to the other complexes. The antibacterial activity of these complexes has been evaluated. Potentiometric titration technique has been used to determination of stability constants of Co (II) with girard T (GT) and glycine oligopeptides (L) complexes in aqueous solutions at 25 degrees C and 0.1M ionic strength. The ternary complexes of Co(II) are formed by stepwise mechanism and the concentration distribution of the complexes is evaluated.