Mn-水杨醛配合物的制备及其催化环烯烃环氧化的研究

Synthesis and application of Mn-sciff base composite catalyst in the aerobic epoxidation of cycloalkenes

合成出Mn-水杨醛席夫碱配合物催化剂,采用1H NMR,13C NMR,元素分析和IR等手段对催化剂进行表征.催化环烯烃环氧化反应以过氧化氢为氧化剂,DMF为溶剂,0.2 mol/L Na2HPO4为缓冲溶液,在常压下进行反应.结果表明,20℃反应3 h,环己烯和环辛烯分别取得了77.9%和63.5%的烯烃转化率,同时有84.5%和99.2%的环氧化物生成.

The Mn-salicylaldehyde schiff-base complex catalyst has been synthesized,characterized by1 H NMR,13 C NMR,elemental analysis and IR.The catalytic epoxidation of alkenes was carried out at 20 ℃under atmospheric pressure with H2O2 in the presence of amount of 0.2 mol/L Na2HPO4 as buffer solution andDMF as solvent.Results showed that the catalyst exhibited high catalytic activity in the epoxidation ofcyclohexene and cyclooctene,which received 77.9% and 63.5% conversion and the selectivity of epoxide was84.5% and 99.2%,respectively.