Aerobic epoxidation of olefins over the composite catalysts of Co-ZSM-5(L) with bi-/tridentate Schiff-base ligands

▶ The composite catalysts Co-ZSM-5(L) are prepared by a simple route. ▶ Co-ZSM-5(L) exhibits a high activity for the epoxidation of alkenes with air. ▶ These solids are highly reusable heterogeneous catalysts. ▶ Based on the experiments, one possible reaction mechanism is proposed.