钒络合物在中孔载体HMS上的组装  

The Assembly of Vanadium Complex on HMS

作　　者：周四清[1] 伏再辉[1] 尹笃林[1] 

机构地区：[1]湖南师范大学精细催化合成研究所,中国长沙410081

出　　处：《湖南师范大学自然科学学报》2002年第1期47-50,共4页Journal of Natural Science of Hunan Normal University

基　　金：国家自然科学基金 (2 97730 13);湖南省自然科学基金 ([湘科计字 2 0 0 0 ] 2 37 0 0JJY2 0 11)资助项目

摘　　要：成功合成了六方中孔硅载体HMS ,利用其丰富的表面羟基实现了先键合钒络合物VOCl2 再键合配体DET(酒石酸二乙酯 )的组装方法 .FT -IR表征络合物和载体表面羟基的键合作用 ,并用络合物滴定法测定了钒的负载量 .苯乙烯环氧化反应考察其催化氧化性能 .系统考察了配体、交换时间、反应条件。Hexagonal mesoporous silica(HMS) has been synthesized successfully. With the rich surface OH groups, we have finished the assembled method for anchoring vanadium complexe over HMS firsly, then bonding the linger DET with vanadium complex. The bonding interactions between vanadium complex and the surface OH groups are studied by FT-IR characterization technology. Results indicate that those assembled catalysts are more active than the free V complex for the epoxidation of styrene with terbutyl hydroperoxide(TBHP). Exchanged time, activated temperature, reaction conditions and DET ligand have significant influences on the oxidative activity and the selectivity to the epoxides of assembled catalysts.

关 键 词：中孔分子筛 钒络合物 催化氧化 苯乙烯 环氧化 固载型 催化剂 组装方法 催化活性 HMS 

分 类 号：TQ426.81[化学工程]