Synthesis and Structure of Novel Ruthenium(II) Mixed Ligands Complexes: Density Functional Theory, DNA Binding and Antimicrobial Studies via PACT Therapy

Ruthenium(II)-based complexes exhibited efficient light-harvesting capabilities that facilitate the enhanced generation of hydroxyl radicals, thereby significantly promoting antibacterial activity. The novel Ru(II) complexes can be represented as [Ru(II)(bfq)(bipy)]Cl2 (Ru-L1), [Ru(II)(bpdc)(bipy)2]Cl2 (Ru-L2) and [Ru(II)(bfq)(NCS)2]Cl2 (Ru-L3), where bfq = benzofuranquinoline carboxylic acid and bipy = bipyridine. The synthesized Ru(II) complexes were characterized with 1H NMR, IR and UV-visible techniques. The physical measurements such as viscosity measurements and denaturation thermal studies explore the behaviour of DNA binding of the synthesized Ru(II) complexes. In this context, the studies on DFT, molecular electrostatic potential and antimicrobial photodynamic therapy against Escherichia coli cells were also conducted. The obtained results show significant inhibition growth of bacterial cells was determined via PACT therapy.