Os(bpy)32+

excited state quenched by Co(NH3)5(N3)2+
Finkenberg, E.; Fisher, P.; Huang, S.-M.Y.; Gafney, H.D.
J. Phys. Chem. 82: 526-31 (1978)

Os(bpy)32+ quenched by Co(NH3)5(N3)2+ at conc. <= 0.008 mol L–1
Solvent : H2O, 0.166 mol/L Na2SO4; 0.013 mol/L NaHSO4, 23-24ºC, ionic strength 0.5

kq = 4 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 = 0.0192 micro sec. (766014)
Electron transfer fraction of quenching = ~1
Comments: see Mech. [7]

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