Ru(5-Brphen)32+

excited state quenched by Cu2+
Baggott, J.E.; Pilling, M.J.
J. Phys. Chem. 84: 3012-9 (1980)

Ru(5-Brphen)32+ quenched by Cu2+
Solvent : H2O, 0.25 mol/L H2SO4, 25ºC, ionic strength 0.8-1

kq = 3.4 x 107(L mol–1 s–1)
Enthalpy of activation = 11(kJ mol–1)
Entropy of activation = –64 (20-80ºC)(J K–1 mol–1)

Mechanism: oxidative electron transfer
Experimental methods: spark lamp, luminescence, single photon counting
Lifetime in the absence of quencher, air free = 0.94 micro sec.

Hoselton, M.A.; Lin, C.-T.; Schwarz, H.A.; Sutin, N.
J. Am. Chem. Soc. 100: 2383-8 (1978)

Ru(5-Brphen)32+ quenched by Cu2+
Solvent : H2O, 0.5 mol/L H2SO4, 25ºC

kq = 4.2 x 107(L mol–1 s–1)

Mechanism: oxidative electron transfer
Experimental methods: steady state irradiation, luminescence
Lifetime in the absence of quencher, air free = 1.0 micro sec. (766404)
Electron transfer fraction of quenching = 0.30

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