Bulletin of the Chemical Society of Japan p. 1944 - 1949 (1992)
Update date:2022-08-16
Topics:
Sakuragi, Masako
Ichimura, Kunihiro
Sakuragi, Hirochika
In the presence of a proper amount of amines such as 1,4-diazabicyclo<2.2.2>octane (DABCO) and piperidine, zinc tetraphenylporphine (ZnTPP) works as a not only apparently more effective but also more photoresistant sensitizer for singlet-oxygen oxygenation of olefins than in the absence of the amines.This is ascribed to the facts that ZnTPP forms a 1:1 complex with DABCO, and that DABCO coordinated to ZnTPP has no ability to quench singlet oxygen, as revealed by detection of singlet oxygen phosphorescence and product distributions in oxygenation of d-limonene, 1,2-dimethylcyclohexene, and 1-phenylcyclobutene.
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