Highly crystalline ordered mesoporous aluminosilicates with hexagonal AlIITM-41 and cubic AlIITM-48 pore symmetries with varying silicon-to-aluminium ratios were hydrothermally synthesized, for the first time, using long-chain ionic-liquid (IL) such as 1-hexadecyl-3-methylimidazolium chloride (HDMIC), as structure directing agent. The prepared materials were systematically characterized by various analytical, spectroscopic and imaging techniques, viz., XRD, BET, TEM and XRF. In addition, the extent of aluminium incorporation and the nature of acid sites were deduced from ²⁷Al MAS-NMR and NH₃-TPD measurements. The structural and physico-chemical properties of both AlIITM-41 and AlIITM-48 were compared with analogous AlMCM-41 and AlMCM-48, respectively prepared using hexadecyltrimethylammonium bromide (CTAB). It was found that all the ionic liquid-templated materials, viz., AlIITM-41 and AlIITM-48, and exhibited large surface area, high crystallinity and thicker pore walls. The observed superior orderness of AlIITM-41 and AlIITM-48 could attribute to a well distributed positive charge and π-π stacking of aromatic imidazolium head group of ionic-liquid. In addition, it also assisted in the incorporation of all the aluminium species exclusively in the tetrahedral silicate framework even after the calcination as confirmed by ²⁷Al MAS NMR. AlIITM-41 and AlIITM-48 possess more medium and strong Bronsted acid sites due to their thicker walls, high crystallinity and presence of tetrahedral aluminium in the framework, due to which they exhibited higher catalytic activity towards tertiary butylation of phenol with a good Para tertiary butyl phenol selectivity compared to commonly used aluminosilicates, H-AlMCM-41 and H-AlMCM-48.

首次使用长链离子液体（IL）（例如1-十六烷基），水热合成具有六边形AlIITM-41和立方AlIITM-48孔对称性且硅铝比变化的高结晶有序介孔硅铝酸盐。 3-甲基咪唑氯化物（HDMIC），作为结构导向剂。通过各种分析，光谱和成像技术（即XRD，BET，TEM和XRF）对制得的材料进行了系统表征。另外，从²⁷ Al MAS-NMR和NH ₃推导了铝的结合程度和酸位的性质。-TPD测量。将AlIITM-41和AlIITM-48的结构和理化性质与分别使用十六烷基三甲基溴化铵（CTAB）制备的类似AlMCM-41和AlMCM-48进行了比较。发现所有离子液体模板材料，即AlIITM-41和AlIITM-48，均具有大的表面积，高的结晶度和较厚的孔壁。观察到的AlIITM-41和AlIITM-48的优良有序性可归因于离子液体的芳族咪唑鎓头基分布均匀的正电荷和π-π堆积。此外，它还有助于将所有铝物种仅在四面体硅酸盐骨架中掺入，正如²⁷所证实的那样。Al MAS NMR。AlIITM-41和AlIITM-48由于壁厚，结晶度高和骨架中存在四面体铝，因此具有更多的中等和强布朗斯台德酸位，这是由于它们对苯酚的叔丁基化表现出较高的催化活性，并具有良好的对叔叔酸与常用的铝硅酸盐H-AlMCM-41和H-AlMCM-48相比，丁基苯酚的选择性更高。