Data was acquired for both degassed and air-saturated solutions. In the air-saturated sample, the triplet lifetime is influenced by the presence of oxygen, as the triplet state is quenched back to the ...

The direct reaction of triplet oxygen with a singlet organic molecule would violate a fundamental principle of physics, the conservation of angular momentum, and thus is 'spin-forbidden'.

Publications of the Astronomical Society of the Pacific Vol. 37, No. 219, October, 1925 Note on the Infra-Red Oxygen Triplet in ... Note on the Infra-Red Oxygen Triplet in Stellar Spectra This is the ...