Chemical Reactivity of Sigma Singlet Oxygen O₂(¹Σg⁺)

Some of the most reactive O 2 ( 1 Δ g ) scavengers have been used as substrates to explore the chemical reactivity of O 2 ( 1 Σ g + ) in CCl 4 . No chemical deactivation channel could be found. However, an additional physical deactivation by the substrate was observed, which competes with the collision-induced deactivation of O 2 ( 1 Σ g + ) by the substrate and which also leads to the formation of O 2 ( 1 Δ g ). The rate constant of this additional deactivation of O 2 ( 1 Σ g + ) is very similar to the rate constant of the deactivation of O 2 ( 1 Δ g ) by the substrate.