Decay constant for singlet oxygen in the solvent:

Ethyl acetate

Aveline, B.; Delgado, O.; Brault, D.
J. Chem. Soc., Faraday Trans. 88(14): 1971-6 (1992)

Lifetime is 4.5 x 10–5 s
Decay rate is 2.2 x 104 s–1

Experimental method: pulsed laser photolysis, luminescence decay
Sensitizer is HVD and PPDME.

Young, R.H.; Brewer, D.R.
Singlet Oxygen, Reactions with Organic Compounds and Polymers, B. Ranby and J.F. Rabek (eds.), John Wiley & Sons, New York, N.Y., 1976, p.36-47

Lifetime is 5 x 10–5 s
Decay rate is 2 x 104 s–1

Experimental method: pulsed laser photolysis, substrate disappearance
Sensitizer is MB,
Substrate is DPBF.

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