| 第 35 卷第 4 期 |  | Vol. 35 No. 4 | | 2005 年 8 月 | Aug 2005 |
|
所屬欄目：有機合成原料
酒石酸鈦配合物在MCM-41上的組裝和催化苯乙烯環(huán)氧化 |
| 吳美芝; 伏再輝; 尹篤林; 銀董紅(湖南科技職業(yè)學(xué)院; 湖南師范大學(xué)化學(xué)化工學(xué)院; 湖南長(cháng)沙) |
| 摘 要：采用表面模板組裝途徑合成了MCM-41介孔材料,研究了這類(lèi)載體上鍵合鈦酸異丙酯+酒石酸二乙酯(Ti(OiPr)4+DET)和TiCl4+DET兩類(lèi)鈦配合物的組裝方法。XRD和FT-IR分別被使用來(lái)表征載體的晶體結構和載體與鈦配合物的鍵合作用,結果表明:MCM-41在焙燒過(guò)程中,其介孔長(cháng)程有序結構會(huì )發(fā)生退化,這種結構退化將導致1219和580cm-1紅外帶的消失,并誘發(fā)載體產(chǎn)生強的Si-OH畸變振動(dòng)。在催化苯乙烯環(huán)氧化反應中,用焙燒載體組裝鈦催化劑顯示了最好的氧化活性;而用含模板劑載體組裝鈦催化劑則顯示出最高的環(huán)氧化選擇性。胺基模板劑和DET配體對鈦活性中心的調變作用將造成其活性下降,而環(huán)氧選擇性上升。 |
| 關(guān)鍵詞：介孔硅載體; 鈦配合物; 組裝; 催化氧化; 苯乙烯環(huán)氧化 |
| 中圖分類(lèi)號：TQ241.2+1 文獻標識碼：A 文章編號：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
|
| 閱讀全文 |
|