Abstract
Abstract— We present an infrared study of 3-hydroxyflavone in 12 K Ar and O2 matrices. Although it is extremely photostable in an Ar matrix, a remarkable oxygenation reaction for 3-hydroxyflavone takes place upon photoexcitation in an O2 matrix. The primary photoproduct is concluded to be a keto-hydroperoxide. On further photolysis the keto-hydroperoxide affords the photostable secondary product 2-(benzoyloxyl)benzoic acid, as well as CO and CO2 through two independent pathways.
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