沸石
介孔材料
层状结构
材料科学
八面体
化学工程
分子
结晶学
纳米技术
化学
晶体结构
复合材料
有机化学
催化作用
工程类
作者
Xiangrong Shen,Wenting Mao,Yanhang Ma,Dongdong Xu,Peng Wu,Osamu Terasaki,Lu Han,Shunai Che
标识
DOI:10.1002/ange.201710748
摘要
Abstract A conceptual design and synthesis of ordered mesoporous zeolites is a challenging research subject in material science. Several seminal articles report that one‐dimensional (1D) mesostructured lamellar zeolites are possibly directed by sheet‐assembly of surfactants, which collapse after removal of intercalated surfactants. However, except for one example of two‐dimensional (2D) hexagonal mesoporous zeolite, no other zeolites with ordered 2D or three‐dimensional (3D) mesostructures have been reported. An ordered 2D mesoporous zeolite can be templated by a cylindrical assembly unit with specific interactions in the hydrophobic part. A template molecule with azobenzene in the hydrophobic tail and diquaternary ammonium in the hydrophilic head group directs hierarchical MFI zeolite with a 2D square mesostructure. The material has an elongated octahedral morphology, and quaternary, ordered, straight, square channels framed by MFI thin sheets expanded along the a – c planes and joined with 90° rotations. The structural matching between the cylindrical assembly unit and zeolite framework is crucial for mesostructure construction.
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