Interaction of singlet oxygen [O2(1Δ)] with aliphatic amines and hydroxylamines
- 1 January 1987
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Journal of the Chemical Society, Perkin Transactions 2
- No. 8,p. 1125-1127
- https://doi.org/10.1039/p29870001125
Abstract
Singlet oxygen quenching rates for O2(1Δ) by triethylamine, diethylamine, and N,N-diethylhydroxylamine have been measured in several solvents. The data obtained for the amines are compatible with a charge-transfer quenching mechanism; quenching is faster in solvents of high capacity to stabilize charges and low capacity to donate a proton. Quenching by N,N-diethylhydroxylamine shows a different solvent dependence: the rate constant depends upon the availability of the hydroxylic hydrogen. This fact, together with the high yields of hydrogen peroxide produced in the singlet oxygen–diethylhydroxylamine reaction, implies a different quenching mechanism.Keywords
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