A NEW FAMILY OF MESOPOROUS MOLECULAR-SIEVES PREPARED WITH LIQUID-CRYSTAL TEMPLATES
A NEW FAMILY OF MESOPOROUS MOLECULAR-SIEVES PREPARED WITH LIQUID-CRYSTAL TEMPLATES
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DOI：
10.1021/ja00053a020
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发表时间：
1992-12-30
影响因子：
15
通讯作者：
SCHLENKER, JL
中科院分区：
文献类型：
--
作者：
BECK, JS;VARTULI, JC;SCHLENKER, JL
描述了一类新的硅酸盐/铝硅酸盐介孔分子筛M41 S的合成、表征和拟议的形成机理。MCM-41是该家族的一个成员，其表现出均匀中孔的六边形排列，其尺寸可以在约15埃至大于100埃的范围内设计。这个家族的其他成员，包括表现出立方对称性的材料，已经被合成。较大孔M41 S材料通常具有高于700 m2/g的表面积和0.7 cc/g和更大的烃吸附容量。一个模板机制（液晶模板-LCT），其中表面活性剂液晶结构作为有机模板，提出了这些材料的形成。在支持这种模板机制，它被证明是MCM-41材料的结构和孔尺寸密切相关的表面活性剂的性质，包括表面活性剂链长和溶液化学。可变孔径MCM-41、立方材料和其他相的存在表明M41 S是一个广泛的材料家族。
The synthesis, characterization, and proposed mechanism of formation of a new family of silicate/aluminosilicate mesoporous molecular sieves designated as M41S is described. MCM-41, one member of this family, exhibits a hexagonal arrangement of uniform mesopores whose dimensions may be engineered in the range of approximately 15 angstrom to greater than 100 angstrom. Other members of this family, including a material exhibiting cubic symmetry, have been synthesized. The larger pore M41S materials typically have surface areas above 700 m2/g and hydrocarbon sorption capacities of 0.7 cc/g and greater. A templating mechanism (liquid crystal templating-LCT) in which surfactant liquid crystal structures serve as organic templates is proposed for the formation of these materials. In support of this templating mechanism, it was demonstrated that the structure and pore dimensions of MCM-41 materials are intimately linked to the properties of the surfactant, including surfactant chain length and solution chemistry. The presence of variable pore size MCM-41, cubic material, and other phases indicates that M41S is an extensive family of materials.