第 35 卷第 4 期 Vol. 35 No. 4 2005 年 8 月 Aug 2005

所属栏目：有机合成原料 酒石酸钛配合物在MCM-41上的组装和催化苯乙烯环氧化

吴美芝; 伏再辉; 尹笃林; 银董红(湖南科技职业学院; 湖南师范大学化学化工学院; 湖南长沙)

摘　要：采用表面模板组装途径合成了MCM-41介孔材料,研究了这类载体上键合钛酸异丙酯+酒石酸二乙酯(Ti(OiPr)4+DET)和TiCl4+DET两类钛配合物的组装方法。XRD和FT-IR分别被使用来表征载体的晶体结构和载体与钛配合物的键合作用,结果表明:MCM-41在焙烧过程中,其介孔长程有序结构会发生退化,这种结构退化将导致1219和580cm-1红外带的消失,并诱发载体产生强的Si-OH畸变振动。在催化苯乙烯环氧化反应中,用焙烧载体组装钛催化剂显示了最好的氧化活性;而用含模板剂载体组装钛催化剂则显示出最高的环氧化选择性。胺基模板剂和DET配体对钛活性中心的调变作用将造成其活性下降,而环氧选择性上升。

关键词：介孔硅载体; 钛配合物; 组装; 催化氧化; 苯乙烯环氧化

中图分类号：TQ241.2+1　　文献标识码：A　　文章编号：1009-9212(2005)04-0045-05

Titanium Tartrate Complex Assembled MCM-41 Catalysts for Styrene Epoxidation

WU Mei-zhi1; FU Zai-hui2; YIN Du-lin2; YIN Dong-hong2 （1.Hunan Vocational College of Science & Technology; Changsha 410118; China; 2.China college of Chemistry and Engineering; Hu'nan Normal University; Changsha 410081; China）

Abstract：MCM-41mesoporous silicas were synthesized by the cooperative assembly of silica and surfactants. The assembled method of two Ti tartrate complexes over the untreated and calcined mesoporous carriers was firstly reported here. XRD and FT-IR were used to characterize the carrier's mesostructures and the binding of the carriers with Ti complexes. The results indicated that the MCM-41's mesostructure with long-range order would be deteriorated. This deterioration of the mesostructure resulted in the disappearan...

Key words：MCM-41; HMS; Ti complexes; Assembly; Bond; Epoxidation of styrene

收稿日期：2005-04-02

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