Decay constant for singlet oxygen in the solvent:

Deuterium oxide/Methanol (50:50)

Merkel, P.B.; Nilsson, R.; Kearns, D.R.
J. Am. Chem. Soc. 94(3): 1030-1 (1972)

Lifetime is 1.1 x 10–5 s
Decay rate is 9.1 x 104 s–1

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

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