A new heterogeneous catalyst based on a chemically modified mesoporous silica gel possessing immobilised cobalt ions is developed and successfully applied to the epoxidation of alkenes.

Chemically-modiÐed mesoporous materials can be prepared as robust catalysts suitable for application in liquid phase processes such as FriedelÈCrafts reactions, selective oxidations, nucleophilic substitutions and aromatic brominations.

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