Mn(Salen)/Al-MCM-41的微波固相法制备及其表征

报道了一种新的微波固相法制备Mn(Salen)/Al-MCM-41催化剂的方法，并与常规制备方法进行了比较。对微波固相法制备的催化剂进行了一系列的表征，表征结果表明，微波固相方法和常规方法均能成功地将Mn(Salen)络合物固载于介孔Al-MCM-41分子筛中，且在原料的量相同的情况下，红外光谱显示微波固相法具有更强的吸收峰。比较了不同方法制备的催化剂在苯乙烯环氧化反应中的催化性能，发现微波固相法制备的Mn(salen)/Al-MCM-41-IP催化剂具有较高的催化活性和最好的环氧化物选择性。还考察了催化剂性能与制备过程中的微波辐射时间的关系。进行了催化剂的重复使用的实验，使用三次后，转化率达到59.4%，选择性可达78.3%。

Preparation of Mn(Salen)/Al-MCM-41 by host-guest interaction under microwave irradiation and their characterization

A novel preparation method for Mn(Salen)/Al-MCM-41 catalysts,i.e.,preparation via host-guest interaction between Mn(Salen) complex and mesoporous Al-MCM-41 under microwave irradiation(MWI),was described.FT-IR,DR UV-Vis and TG-DSC results indicated that Mn(Salen) complex was successfully immobilized on mesoporous Al-MCM-41 using MWI and traditional method,with stronger and broaden absorbance peak at 1 447.9 cm~(-1) under MWI.Influence of preparation methods on activity and selectivity of the catalysts for styrene epoxidation was investigated.(Mn(Salen)/Al-MCM-41-IP) showed high styrene conversion and optimum selectivity to phenyloxirane.The Mn(Salen)/Al-MCM-41-IP was also tested for repeated use,with styrene conversion of 59.4% and selectivity to phenyloxirane of 78.3% after three times of use.