Decay constant for singlet oxygen in the solvent:

Chlorobenzene-d5

Hurst, J.R.; Schuster, G.B.
J. Am. Chem. Soc. 105(18): 5756-60 (1983)

Lifetime is 1.2 x 10–3 s
Decay rate is 8.3 x 102 s–1

Experimental method: pulsed laser photolysis, luminescence decay
Sensitizer is MB, RB or TPP.

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