《Table 1Catalytic performance of different catalysts in epoxidation of olefins.》

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《离子型共价有机框架材料的合成及其催化性能（英文）》

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Reaction conditions:olefin 5 mmol，IBA 15 mmol，catalyst 15 mg，CH3CN 1.0 m L，room temperature，12 h，in air.a Second cycle.b Third cycle.

The I-COF with Mn2+exchanged into the frameworks was explored for use as the heterogeneous catalyst for epoxidation of different olefins to epoxides.The epoxidation of stilbene was first used as a model reaction.A high conversion of 99%with a yield of 99%was observed（Table 1，entry 1），showing that[SO3Mn]-Dha Tab is highly active in this reaction.To further judge the highly catalytic activity of[SO3Mn]-Dha Tab，the epoxidation of styrene was also investigated.The conversion of styrene was 99%，and the yield was 74%（Table 1，entry 4），which is higher than that for the reaction without the catalyst and for the experiment in which Mn（OAc）2 and[SO3H]-Dha Tab were used as catalysts（Table 1，entries 5 and 6）.