86696-18-6Relevant academic research and scientific papers
Preparation, spectroscopic characterization, and photochemical and electrochemical properties of some bis(2,2′-bipyridyl)ruthenium(II) and tetracarbonyltungsten(0) complexes of 6-p-Tolyl-2,2′-bipyridyl and of 6-p-styryl-2,2′-bipyridyl and its copolymers
Kelly, John M.,Long, Conor,O'Connell, Catherine M.,Vos, Johannes G.,Tinnemans, Alois H. A.
, p. 2818 - 2824 (2008/10/08)
The syntheses of 6-p-styryl-2,2′-bipyridyl (6-stybpy) (1), 6-p-tolyl-2,2′-bipyridyl (6-tolbpy) (2), 6,6′-di-p-tolyl-2,2′-bipyridyl (3), W(CO)4(6-stybpy) (4), [Ru(bpy)2(6-stybpy)](PF6)2 (5), and [Ru(bpy)2(6-tolbpy)](PF6)2 (6) are described. 1H NMR spectra of 5 and 6 taken between 0 and 75°C reveal that in these complexes the rotation of the phenylene group is hindered. In contrast to [Ru(bpy)3]2+, 5 and 6 are only weakly luminescent at room temperature in fluid solution. Copolymers of 1 with styrene, methyl methacrylate (MMA), or maleic anhydride and copolymers of 4 and 5 with styrene have been prepared by radical-initiated copolymerization. Polymer-bound Ru(bpy)2 complexes of poly(6-stybpy-co-MMA) are formed by reaction of [Ru(bpy)2(OH2)Cl]+ and a poly(6-stybpy-co-MMA) copolymer. The luminescence and photochemical properties of this polymer-bound Ru(bpy)2 complex and also of poly(sty-co-[Ru(bpy)2(6-stybpy)]2+) differ quite markedly from those reported for Ru(bpy)2 derivatives of bipyridylated polystyrene, possibly indicating that in this latter material the bipyridyl function is bound to the polystyrene through its 4-position.
