Luminescence quenching of Ru(phen) complexes – Effect of micelles and DNA

Studies on the luminescence quenching of Ru(phen) 2 3 + (phen = 1,10-phenanthroline) by the polymer–cobalt(III) complex ions, cis-[Co(phen)2(BPEI)Cl]^2+ and cis-[Co(bpy)2(BPEI)Cl]^2+ (bpy = 2,2′- bipyridine, BPEI = branched polyethyleneimine) in DNA as well as in various micellar media by steadystate emission spectroscopic technique have been reported. The quenching rate constants were arrived through Stern–Volmer equation. The results have been analysed based on hydrophobic as well as electrostatic binding between polymer-cobalt(III) complexes and DNA/micelles.