Decay constant for singlet oxygen in the solvent: Dichloromethane-d2

Lifetime is 1.2 x 10^–4 s
Decay rate is 8.3 x 10³ s^–1

Experimental method: continuous photolysis, luminescence intensity
Sensitizer is Benz[de]anthracen-7-one, phenalenone or fluorenone
rel. to k_d = 4.0 x 10⁴ s^–1 in benzene.