Decay constant for singlet oxygen in the solvent:

Deuterium oxide/Ethanol (95:5)

Krasnovsky, A.A.,Jr.; Neverov, K.V.; Egorov, S.Yu.; Reder, B.
Opt. Spectrosc. (USSR) 64(4): 471-4 (1988)

Lifetime is ~6 x 10–5 s
Decay rate is ~2 x 104 s–1

Experimental method: pulsed laser photolysis, luminescence decay
Sensitizer is Ppb a.

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