Photopromoted oxidative cyclization of an o-phenylene-bridged Schiff base via a manganese(III) complex, leading to a fluorescent compound, 2-(2-hydroxyphenyl)benzimidazole

Abstract

Visible light photolysis of [N,N′-o-phenylenebis-(salicylideneaminato)]diaquamanganese(III) resulted in the fluorescent compound 2-(2-hydroxyphenyl)benzimidazole by a one electron redox reaction between Mn^III and the Schiff base ligand, followed by the base-hydrolysis of the oxidized Schiff base, and then the cyclization of the base-hydrolyzed product.

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