以钛酸丁酯为原料,通过液相移植反应,在介孔氧化硅MCM-41 中成功地组装了Ti(IV),利用XRD、TEM、EDS、FT-IR、N2吸附-脱附、29Si MAS NMR 等多种实验方法对材料进行了表征, 并讨论了液相移植反应的机理. 实验表明,通过与介孔材料骨架表面Q3硅原子中的硅醇键(Si-OH)的反应而形成钛-氧-硅(Ti-O-Si)键,Ti(IV)被成功地固定到介孔材料的骨架上面;950960cm-1 红外共振吸收的加强是Si-O-Ti键形成的标志.
Ti(IV) was successfully grafted onto the frameworks of MCM-41 material by solution grafting reaction scheme. The product was extensively characterized by XRD, TEM, EDS, FT-IR, N2 adsorption-desorption isotherms and 29Si MAS NMR methods. Three mechanisms of the solution grafting reaction were put forward. Experimental results show that the Si-OH groups react with Ti(OBu)4 and form Si-O-Ti bands, which are marked by the strong absorption at 950960cm-1 in IR spectra.
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