Os(bpy)32+ excited state quenched by Ru(NH3)63+

Os(bpy)₃²⁺ quenched by Ru(NH₃)₆³⁺ at conc. <= 0.02 mol L^–1
Solvent : H₂O, 0.5 mol/L NaCl, 25ºC

k_q = 4.8 x 10⁹(L mol^–1 s^–1)

Mechanism: oxidative electron transfer
Experimental methods: steady state irradiation, , luminescence, single photon counting
Lifetime in the absence of quencher, air free = 0.019 micro sec. (spark lamp, luminescence, single photon counting)