Homogeneous and heterogeneous photoreactions of decomposition and oxidation of carboxylic acids

Abstract

Decarboxylation and oxidation reactions of carboxylic acids in the presence of various light receivers are reviewed from the experimental and mechanistic standpoints. The homogeneous photoreceivers studied are the ions UO₂²⁺, Fe²⁺ and Cu²⁺. They differ in activity and in selectivity as far as the nature of the hydrocarbons formed by decarboxylation is concerned. The activity of the heterogeneous photocatalyst TiO₂ (anatase) in oxidation is shown to be greatly increased in the presence of dissolved substances, e.g. Fe³⁺ and Cu²⁺.