Cr(bpy)33+

excited state quenched by Fe2+
Ohno, T.; Kato, S.
Bull. Chem. Soc. Jpn. 57: 1528-33 (1984)

Cr(bpy)33+ quenched by Fe2+
Solvent : H2O, 1 mol/L HCl, ~15ºC

kq = 4 x 107(L mol–1 s–1)

Mechanism: reductive electron transfer
Experimental methods: laser flash, absorption, multiple shot with signal averaging
Lifetime in the absence of quencher, air free = 60 micro sec.
Electron transfer fraction of quenching = 0.081
Comments: Q as Cl– complex

Ohno, T.; Kato, S.
Bull. Chem. Soc. Jpn. 57: 1528-33 (1984)

Cr(bpy)33+ quenched by Fe2+
Solvent : H2O, 1 mol/L HClO4, ~15ºC

kq = 7 x 106(L mol–1 s–1)

Mechanism: reductive electron transfer
Experimental methods: laser flash, absorption, multiple shot with signal averaging
Lifetime in the absence of quencher, air free = 60 micro sec.
Electron transfer fraction of quenching = 0.17

Serpone, N.; Jamieson, M.A.; Henry, M.S.; Hoffman, M.Z.; Bolletta, F.; Maestri, M.
J. Am. Chem. Soc. 101: 2907-16 (1979)

Cr(bpy)33+ quenched by Fe2+
Solvent : H2O, 1 mol/L HCl, 25ºC

kq = 3.7 x 107(L mol–1 s–1)

Mechanism: reductive electron transfer
Experimental methods: steady state irradiation, luminescence
Lifetime in the absence of quencher, air saturated = 55 micro sec. (laser flash, luminescence, multiple shot with signal averaging)

Brunschwig, B.; Sutin, N.
J. Am. Chem. Soc. 100: 7568-77 (1978)

Cr(bpy)33+ quenched by Fe2+
Solvent : H2O, 1 mol/L H2SO4, 25ºC

kq = 1.6 x 107(L mol–1 s–1)

Mechanism: reductive electron transfer
Experimental methods: steady state irradiation, luminescence
Lifetime in the absence of quencher, air free = 76 micro sec. (laser flash, luminescence, multiple shot with signal averaging)

Ballardini, R.; Varani, G.; Scandola, F.; Balzani, V.
J. Am. Chem. Soc. 98: 7432-3 (1976)

Cr(bpy)33+ quenched by Fe2+
Solvent : H2O, ionic strength 1

kq = 4.1 x 107(L mol–1 s–1)

Mechanism: reductive electron transfer

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