Ru(bpy)32+

excited state quenched by 1,4-Benzoquinone
Vlcek, A.,Jr.; Bolletta, F.
Inorg. Chim. Acta 76: L227-L229 (1983)

Ru(bpy)32+ quenched by 1,4-Benzoquinone
Solvent : DMF

kq = 6.3 x 109(L mol–1 s–1)

Mechanism: oxidative electron transfer
Experimental methods: steady state irradiation, luminescence
Lifetime in the absence of quencher, air saturated = 0.20 micro sec. (laser flash, luminescence, multiple shot with signal averaging)

Chu, D.Y.; Thomas, J.K.
J. Phys. Chem. 89: 4065-70 (1985)

Ru(bpy)32+ quenched by 1,4-Benzoquinone
Solvent : H2O

kq = 1.1 x 1010(L mol–1 s–1)


Experimental methods: laser flash, luminescence, single shot signal
Lifetime in the absence of quencher, air free = 0.59 micro sec.

Darwent, J.R.; Kalyanasundaram, K.
J. Chem. Soc., Faraday Trans. 2 77: 373-82 (1981)

Ru(bpy)32+ quenched by 1,4-Benzoquinone at conc. (2-20) x 10–4 mol L–1
Solvent : H2O, 0.005 mol/L Pbuf, pH 6.9, ionic strength 0.04

kq = 3.7 x 109(L mol–1 s–1)

Mechanism: oxidative electron transfer
Experimental methods: steady state irradiation, , luminescence, single shot signal
Lifetime in the absence of quencher, air free = 0.63 micro sec.
Electron transfer fraction of quenching = 0.08

Chu, D.Y.; Thomas, J.K.
J. Phys. Chem. 89: 4065-70 (1985)

Ru(bpy)32+ quenched by 1,4-Benzoquinone
Solvent : H2O, 9.4 x 10–5 mol/L PMA, pH 2

kq = 8.7 x 109(L mol–1 s–1)


Experimental methods: laser flash, luminescence, single shot signal
Lifetime in the absence of quencher, air free = 0.59 micro sec.

Chu, D.Y.; Thomas, J.K.
J. Phys. Chem. 89: 4065-70 (1985)

Ru(bpy)32+ quenched by 1,4-Benzoquinone
Solvent : H2O, 9.4 x 10–5 mol/L PMA, pH 7

kq = 5.6 x 109(L mol–1 s–1)


Experimental methods: laser flash, luminescence, single shot signal
Lifetime in the absence of quencher, air free = 0.67 micro sec.

Chu, D.Y.; Thomas, J.K.
J. Phys. Chem. 89: 4065-70 (1985)

Ru(bpy)32+ quenched by 1,4-Benzoquinone
Solvent : H2O, 9.4 x 10–5 mol/L PMA, pH 9

kq = 9.0 x 109(L mol–1 s–1)


Experimental methods: laser flash, luminescence, single shot signal
Lifetime in the absence of quencher, air free = 0.59 micro sec.

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