Ru(bpy)32+ excited state quenched by Co(NH3)5(benzoato)2+

Ru(bpy)₃²⁺ quenched by Co(NH₃)₅(benzoato)²⁺ at conc. (5-50) x 10^–4 mol L^–1
Solvent : H₂O, Pbuf, 25ºC, pH 5.8, ionic strength 0.10 (LiClO₄)

k_q = 1.5 x 10⁸(L mol^–1 s^–1)

Mechanism: oxidative electron transfer
Experimental methods: steady state irradiation, , quantum yield of a photoproduct
Lifetime in the absence of quencher, air free = 0.60 micro sec. (747635)
Electron transfer fraction of quenching = 0.5
Comments: see Mech. [7]