Ru(bpy)32+ excited state quenched by CoSiW11O39H2O6–

Ru(bpy)₃²⁺ quenched by CoSiW₁₁O₃₉H₂O^6– at conc. (2, 4) x 10^–4 mol L^–1
Solvent : H₂O

k_q = ~3 x 10¹⁰ (calc)(L mol^–1 s^–1)

Mechanism: oxidative electron transfer
Experimental methods: spark lamp, luminescence, single photon counting
Lifetime in the absence of quencher, air saturated = 0.40 micro sec.
Comments: some static quenching, see Mech. [11]