Nucleic acid interaction and antibacterial behaviours of a ternary palladium(II) complexes

The bidentate ligands and Pd(II) complexes have been synthesized and characterized using elemental analysis (C, H, N), 1H NMR, 13C NMR, electronic spectra, FT-IR and FAB mass spectroscopy. The binding of palladium complexes with calf thymus DNA (CT DNA) has been explored using absorption titration, DNA melting temperature and viscosity measurements. The cleavage reaction on pUC19 DNA has been monitored by agarose gel electrophoresis. The results suggest that complexes can bind to DNA by intercalative modes and exhibit nuclease activities in which supercoil form is converted to open circular form. The antibacterial activity of ligands and complexes has been performed against three Gram(−ve) and two Gram(+ve) microorganisms and the study indicates that all the complexes show better microbial inhibition activity than ligands and palladium salt.

Square planar complexes of palladium(II) binding with DNA via classical intercalative mode and enhancement in DNA cleavage ability.Figure optionsDownload as PowerPoint slideHighlights
► Synthesis and characterization of bidentate ligands and their Pd (II) complexes.
► All Pd (II) complexes have been tested for their antibacterial studies.
► The DNA interaction of complexes has been performed.