Cr(bpy)33+

excited state quenched by I–
Maestri, M.; Bolletta, F.; Moggi, L.; Balzani, V.; Henry, M.S.; Hoffman, M.Z.
J. Am. Chem. Soc. 100: 2694-701 (1978)

Cr(bpy)33+ quenched by I– at conc. (1-12) x 10–5 mol L–1
Solvent : H2O, 11ºC, ionic strength 1.0 (NaCl)

kq = 8.5 x 108(L mol–1 s–1)

Mechanism: reductive electron transfer?
Experimental methods: steady state irradiation, , luminescence, single photon counting
Lifetime in the absence of quencher, air saturated = 80 micro sec.

Maestri, M.; Bolletta, F.; Moggi, L.; Balzani, V.; Henry, M.S.; Hoffman, M.Z.
J. Am. Chem. Soc. 100: 2694-701 (1978)

Cr(bpy)33+ quenched by I–
Solvent : H2O, 22ºC, ionic strength 1.0 (NaCl)

kq = 1.2 x 109(L mol–1 s–1)

Mechanism: reductive electron transfer?
Experimental methods: laser flash, absorption, single shot signal
Lifetime in the absence of quencher, air free = 63 micro sec.
This value also reported in 776321

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 I–
Solvent : H2O, 1 mol/L HCl, 25ºC

kq = 1.4 x 109(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)

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