Zhang Lei, Li Fangfang, You Jianjun, Hua Nengbin, Wang Qianting, Si Junhui, Chen Wenzhe, Wang Wenjing, Wu Xiaoyuan, Yang Wenbin, Yuan Daqiang, Lu Canzhong, Liu Yanrong, Al-Enizi Abdullah M, Nafady Ayman, Ma Shengqian
College of Materials Science and Engineering, Fujian University of Technology Fuzhou 350118 China
CAS Key Laboratory of Design and Assembly of Functional Nanostructures, Fujian Provincial Key Laboratory of Nanomaterials, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences Fuzhou 350002 China
Chem Sci. 2021 Mar 5;12(16):5767-5773. doi: 10.1039/d0sc06841a.
Despite their scarcity due to synthetic challenges, supertetrahedron-based metal-organic frameworks (MOFs) possess intriguing architectures, diverse functionalities, and superb properties that make them in-demand materials. Employing a new window-space-directed assembly strategy, a family of mesoporous zeolitic MOFs have been constructed herein from corner-shared supertetrahedra based on homometallic or heterometallic trimers [M(OH/O)(COO)] (M = Co, Ni or CoTi). These MOFs consisted of close-packed truncated octahedral cages possessing a sodalite topology and large β-cavity mesoporous cages (∼22 Å diameter) connected by ultramicroporous apertures (∼5.6 Å diameter). Notably, the supertetrahedron-based sodalite topology MOF combined with the CoTi trimer exhibited high thermal and chemical stability as well as the ability to efficiently separate acetylene (CH) from carbon dioxide (CO).
尽管基于超级四面体的金属有机框架（MOF）由于合成挑战而稀缺，但它们具有引人入胜的结构、多样的功能和卓越的性能，使其成为热门材料。本文采用一种新的窗口空间导向组装策略，基于同金属或异金属三聚体[M(OH/O)(COO)]（M = Co、Ni或CoTi）的角共享超级四面体构建了一系列介孔沸石型MOF。这些MOF由具有方钠石拓扑结构的密堆积截角八面体笼和通过超微孔孔道（直径约5.6 Å）连接的大β-腔介孔笼（直径约22 Å）组成。值得注意的是，基于超级四面体的方钠石拓扑结构MOF与CoTi三聚体相结合，表现出高热稳定性和化学稳定性，以及从二氧化碳（CO₂）中有效分离乙炔（C₂H₂）的能力。
