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以3-氨丙基三乙氧基硅烷(3-aminopropyltriethoxysilane,APS)为偶联剂,用共缩聚的方法合成了氨基官能化的MCM-41介孔分子筛(amino-functionalized mesoporous MCM-41,AP-MCM-41),在分子筛孔道和表面共价偶联Ag(Ⅰ)Schiff碱配合物。采用X射线衍射、Fourier红外光谱、紫外-可见光谱、氮气吸附/脱附、元素分析和透射电子显微镜对所制备的样品进行了表征。结果表明:Ag(Ⅰ)Schiff碱配合物被成功嫁接到了分子筛的孔道和表面上,而且嫁接后的MCM-41仍然具有较好的孔径分布和有序结构,比表面积达到712.59m2/g,最可几孔径为3.41nm,具有典型的介孔材料特征。透射电子显微镜观察显示具有明显的孔道结构,并且较为规整。紫外-可见光谱显示,金属配位后,样品的相应的归属峰发生了明显的漂移,说明Ag(Ⅰ)Schiff碱配合物已嫁接到MCM-41表面并形成牢固的结构。
Amino-functionalized MCM-41 mesoporous molecular sieves were synthesized by copolycondensation of 3-aminopropyltriethoxysilane (APS) -MCM-41), Ag (Ⅰ) Schiff base complexes were covalently coupled to the pore and surface of molecular sieves. The prepared samples were characterized by X-ray diffraction, Fourier transform infrared spectroscopy, ultraviolet-visible spectroscopy, nitrogen adsorption / desorption, elemental analysis and transmission electron microscopy. The results showed that the grafted Ag (Ⅰ) Schiff base was successfully grafted onto the pore and surface of the molecular sieve, and the grafted MCM-41 still had good pore size distribution and ordered structure with a specific surface area of 712.59m2 / g A few aperture can be 3.41nm, with the typical characteristics of mesoporous materials. Transmission electron microscopy showed obvious pore structure and was more regular. The results of UV-vis spectroscopy show that the corresponding peak of the sample shifts significantly after the coordination of the metal, indicating that the Ag (Ⅰ) Schiff base complex has been grafted to the MCM-41 surface and forms a firm structure.