Various nitrogen containing compounds have previously been shown to quench singlet oxygen (10z). When measuring the dimol 1 O 2 light emission arising from the H 2 O 2 /OCI‐ reaction, we found that certain cyclic diamines increase the emission of light, while other amines were inhibitory. This increase of light emission was seen with both 1, 4diazabicyclo[2.2.2]octane and N, N'‐dimethylpi‐perazine but not with acyclic analogues. Sodium azide inhibited both the normal and enhanced light emission. The enhanced light emission shows spectral properties characteristic of l O 2 dimol emission.
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Deneke et al. (1977) studied this question.
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