Decay constant for singlet oxygen in the solvent:

Butylbenzene

Ogilby, P.R.; Kristiansen, M.; Clough, R.L.
Macromolecules 23(10): 2698-704 (1990)

Lifetime is 2.5 x 10–5 s
Decay rate is 4.0 x 104 s–1

Experimental method: pulsed laser photolysis, luminescence decay
Sensitizer is O2:solvent CT state.

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