Decay constant for singlet oxygen in the solvent:

Iodobenzene-d5

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

Lifetime is 2.8 x 10–4 s
Decay rate is 3.6 x 103 s–1

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

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