Ru(bpy)32+

excited state quenched by Co(phen)33+
Sandrini, D.; Gandolfi, M.T.; Maestri, M.; Bolletta, F.; Balzani, V.
Inorg. Chem. 23: 3017-23 (1984)

Ru(bpy)32+ quenched by Co(phen)33+
Solvent : H2O, 0.1 mol/L H2SO4, ~22ºC

kq = 1.9 x 109(L mol–1 s–1)

Mechanism: oxidative electron transfer
Experimental methods: steady state irradiation, luminescence
Lifetime in the absence of quencher, air saturated = 0.40 micro sec. (laser flash, luminescence, multiple shot with signal averaging)

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

Ru(bpy)32+ quenched by Co(phen)33+
Solvent : H2O, 0.17 mol/L NaCl, 25ºC

kq = 2.3 x 109(L mol–1 s–1)

Mechanism: oxidative electron transfer
Experimental methods: steady state irradiation, luminescence
Lifetime in the absence of quencher, air free = 0.60 micro sec. (747635)

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

Ru(bpy)32+ quenched by Co(phen)33+ at conc. <= 0.025 mol L–1
Solvent : H2O, 0.5 mol/L NaCl, 25ºC

kq = 3.0 x 109(L mol–1 s–1)

Mechanism: oxidative electron transfer
Experimental methods: steady state irradiation, luminescence
Lifetime in the absence of quencher, air free = 0.60 micro sec. (747635)

Krist, K.; Gafney, H.D.
J. Phys. Chem. 86: 951-8 (1982)

Ru(bpy)32+ quenched by Co(phen)33+ at conc. (2.5-20) x 10–4 mol L–1
Solvent : H2O, 0.01 mol/L H2SO4, 0.33 mol/L Na2SO4, ionic strength 1.0

kq = 2.4 x 109(L mol–1 s–1)

Mechanism: oxidative electron transfer; energy transfer
Experimental methods: conventional flash, quantum yield of a photoproduct
Lifetime in the absence of quencher, air free = 0.60 micro sec. (747635)
Electron transfer fraction of quenching = 0.53
Comments: see Mech. [8]; kq = 2.2 x 109 L mol–1 s–1 for steady state irradiation/luminescence from same lab in 80A003

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