Os(bpy)32+

excited state quenched by Fe(CN)63–
Juris, A.; Manfrin, M.F.; Maestri, M.; Serpone, N.
Inorg. Chem. 17: 2258-61 (1978)

Os(bpy)32+ quenched by Fe(CN)63–
Solvent : H2O, 0.5 mol/L NaCl, ~20ºC

kq = 9.4 x 109(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 = 0.021 micro sec.

Lin, C.-T.; Sutin, N.
J. Phys. Chem. 80: 97-105 (1976)

Os(bpy)32+ quenched by Fe(CN)63– at conc. <= 0.01 mol L–1
Solvent : H2O, 0.5 mol/L NaCl, 25ºC

kq = 1.3 x 1010(L mol–1 s–1)

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

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