Synthesis, Characterization, Fluorescence, Electrochemical and Biological Studies on Co(II), Ni (II) and Cu(II) complexes of N-4-methoxyphenyl (2,4-dihydroxyacetophenylideneimine)

S.Amala, S.Santhi, R.Suganya

The Co(II), Ni(II) and Cu(II) complexes of resacetophenone-anisidine Schiff base have been synthesized, characterized and their electrochemical, fluorescence and biological behaviour have also been reported. The complexes have been characterized on the basis of metal estimation studies, molar conductance measurements, magnetic susceptibility measurements, IR, UV-visible, EPR spectral studies and thermal analysis. Analytical data revealed that there is a formation of 1:2 metal : ligand complex. Based on the various data, an octahedral geometry has been suggested for  Co(II) complex, square planar geometry has been suggested for Cu(II) and Ni(II) complexes. A tentative structure has been proposed  to the complexes. The redox property of the complexes have been examined by using cyclic voltammetry. Fluorescence property of the  complexes have been studied and the complexes are found to have remarkably high fluorescence behavior compared to the ligand.  The complexes have been screened against bacterial and fungal pathogens. The activities of the complexes are higher than the ligand towards most of the pathogens studied.