Enantiopreferential DNA-binding of a novel dinuclear complex [(bpy)2Ru(bdptb)Ru(bpy)2]4+

A novel dinuclear ruthenium(II) complex [(bpy)2Ru(bdptb)Ru(bpy)2]4+ (bpy=2,2′-bipyridyl; bdptb=2,2′-bis(5,6-diphenyl-1,2,4-triazin-3-yl)-4,4′-bipyridine) has been synthesized and characterized. The DNA-binding behaviors of this complex have been studied by viscosity, absorption and circular dichroism (CD) spectra. It has firstly been found that the dinuclear ruthenium(II) complex display the enantiopreferential DNA-binding after equilibrium dialysis.