Interaction of [Ru(dmp)2(dppz)2+ and [Ru(dmb)2(dppz)]2+ with DNA:: Effects of the ancillary ligands on the DNA-binding behaviors

By the incorporation of methyl groups on the ancillary ligand of phen and bpy, different DNA-binding behaviors of complexes 1 and 2 were characterized. Different binding rates of the isomers of 2 with CT-DNA via CD spectra were observed through dialysis experiments but not with complex 1.