Os(bpy)32+ excited state quenched by PtBr42–

Os(bpy)₃²⁺ quenched by PtBr₄^2–
Solvent : H₂O, ionic strength 2 (HClO₄)

k_q = 3.0 x 10⁹(L mol^–1 s^–1)

Mechanism: energy transfer
Experimental methods: laser flash, luminescence, , luminescence
Lifetime in the absence of quencher, air saturated = 0.02 micro sec.