Synthesis and Assessment of Antibacterial Activities of Ruthenium(III) Mixed Ligand Complexes Containing 1,10 Phenanthroline and Guanide
In this work, two complexes of ruthenium(III) [Ru(phen)2Cl2]Cl*2H2O and [Ru(phen)2(G)Cl]2Cl*H2O) were synthesized from 1,10 phenanthroline alone as well as from both 1,10 phenanthroline and guanide. The synthesis was checked using halide test, conductance measurement, and spectroscopic (ICP OES, FTIR, and UV/Vis) analysis. Their in vitro antibacterial activities were also investigated on two Gram positive (Staphylococcus aureus (S. aureus) and methicillin resistant Staphylococcus aureus (MRSA) and two Gram negative (Escherichia coli (E. coli) and Klebsiella pneumoniae (K. pneumoniae) bacteria. These complexes showed wide range better activities than the commercially available controls (Chloramphenicol and Ciprofloxacin) against even the most drug resistant K. pneumoniae. [Ru(phen)2(G)Cl]2Cl*H2O inhibited S. aureus, MRSA, E. coli, and K. pneumoniae by 17.5% 27.4% 16% and 52% respectively, better than Chloramphenicol. It also inhibited these pathogens by 5.9% 5.1% 2.3% and 17.2% respectively, better than Ciprofloxacin. Similarly, [Ru(Phen)2(Cl)2]Cl*2H2O inhibited these pathogens by 11% 8.7% 0.1% and 31.2% respectively, better than Chloramphenicol. Therefore, after in vivo cytotoxicity investigations, these compounds can be considered as potential antibiotic drugs.
Bioinorganic chemistry and applications