Synthesis and characterization of new binuclear Co(II) and Ni(II) complexes derived from N, N '-bis(4-dimethyl-aminobenzylidene)-benzene-1,3-diamine as active catalysts for hydroxylation of phenol and their antibacterial properties
Kafi-Ahmadi, L; Javanpour, B; ,
In the current study, both of Ni(II) and Co(II) complexes were derived from N,N '-bis(4-dimethyl-aminobenzylidene)-benzene-1,3-diamine as a novel ligand. The ligand and complexes were characterized by elemental analysis (CHNS), Fourier transform infrared spectroscopy (FT-IR), Ultraviolet-visible spectroscopy (UV-Vis), ESI mass spectroscopy, conductance, and magnetic moment measurements. Regarding magnetic moment measurements and spectral studies, an octahedral structure was suggested. The free ligand and metal complexes were evaluated in vitro against three bacterial pathogens, including;Staphylococcus aureus,Escherichia coli, andBacillus subtilis. The growth inhibition zone of Ni(II) and Co(II) complexes was far more extended than the norm. Furthermore, we studied the catalytic activity of these complexes through the hydroxylation of phenol. Comparisons revealed that the catalytic performance of the Ni(II) complex was considerable than that of the Co(II) complex. Four parameters (i.e., duration of reaction, temperature, catalyst amount, and oxidant amount) were regarded for Ni(II) complex (as a catalyst) to achieve an optimum condition for hydroxylation of phenol. Ultimately, adequate time for the reaction was recognized in the 2 h duration and at 60 degrees C.