Synthesis, Characterization, Biological Activity, and Scanning Electron Microscopy Studies of Schiff Base Binuclear Complexes Co (II), Cu (II), Cd (II), and Pt (II) Derivative from Tolidine with Salicylaldehyde

In this study, binuclear complexes with the general formula [M2LCl4] were prepared, which were derived from salsaldehyde with 3,3′-Dimethyl-[1,1′-biphenyl]-4,4′-diamine (toluidine) and metal ions M= Co (II), Cu (II), Cd (II), and Pt (II) in a ratio (2:1) (metal: ligand). These complexes were characterized by elemental analysis (CHN), UV-Visible, FT-IR, 1H-NMR, and magnetic susceptibility, scanning electron microscopy (SEM), and molar conductivity. All complexes are non-electrolytic as the measurements confirmed that the complexes have a square planar structure. SEM showed that the complexes were of nanometric structure. The biological activity of the prepared complexes was tested to inhibit the growth of three types of bacteria: Escherichia coli, Pseudomonas aeruginosa, and Staphylococcus aureus.