Ru(bpy)32+

excited state quenched by 4,4'-Dinitrobiphenyl
Bock, C.R.; Connor, J.A.; Gutierrez, A.R.; Meyer, T.J.; Whitten, D.G.; Sullivan, B.P.; Nagle, J.K.
J. Am. Chem. Soc. 101: 4815-24 (1979)

Ru(bpy)32+ quenched by 4,4'-Dinitrobiphenyl
Solvent : Acetonitrile, 0.1 mol/L TEAP, ~22ºC

kq = 1.2 x 108(L mol–1 s–1)

Mechanism: oxidative electron transfer
Experimental methods: steady state irradiation, luminescence
Lifetime in the absence of quencher, air free = 0.85 micro sec. (767009)
This value also reported in 757168

Kitamura, N.; Okano, S.; Tazuke, S.
Chem. Phys. Lett. 90: 13-6 (1982)

Ru(bpy)32+ quenched by 4,4'-Dinitrobiphenyl at conc. <= 0.014 mol L–1
Solvent : Acetonitrile, 25ºC

kq = 4.4 x 107(L mol–1 s–1)
Free energy of activation = 29(kJ mol–1)
Enthalpy of activation = –24(kJ mol–1)
Entropy of activation = –181 (10-40 ºC)(J K–1 mol–1)

Mechanism: oxidative electron transfer
Experimental methods: steady state irradiation, luminescence
Lifetime in the absence of quencher, air free = 0.85 micro sec. (laser flash, luminescence, multiple shot with signal averaging)

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