Miao Jiafeng, Graham Wells, Liu Jiaqi, Hill Ena Clementine, Ma Lu-Lu, Ullah Saif, Xia Hai-Lun, Guo Fu-An, Thonhauser Timo, Proserpio Davide M, Li Jing, Wang Hao
Hoffmann Institute of Advanced Materials, Shenzhen Polytechnic University, 7098 Liuxian Boulevard, Shenzhen, Guangdong 518055, P. R. China.
Department of Physics and Center for Functional Materials, Wake Forest University, Winston-Salem, North Carolina 27109, United States.
J Am Chem Soc. 2024 Jan 10;146(1):84-88. doi: 10.1021/jacs.3c11260. Epub 2023 Dec 29.
Alkali metal-based metal-organic frameworks (MOFs) with permanent porosity are scarce because of their high tendency to coordinate with solvents such as water. However, these MOFs are lightweight and bear gravimetric benefits for gas adsorption related applications. In this study, we present the successful construction of a microporous MOF, designated as HIAM-111, built solely on sodium ions by using an octacarboxylate linker. The structure of HIAM-111 is based on 8-connected Na clusters and exhibits a novel topology with an underlying 3,4,8-c net. Remarkably, HAM-111 possesses a robust and highly porous framework with a BET surface area of 1561 m/g, significantly surpassing that of the previously reported Na-MOFs. Further investigations demonstrate that HIAM-111 is capable of separating CH/CO and purifying CH directly from CH/CH/CH with high adsorption capacities. The current work may shed light on the rational design of robust and porous MOFs based on alkali metals.
基于碱金属的具有永久孔隙率的金属有机框架材料（MOFs）由于其极易与水等溶剂配位而较为稀少。然而，这些MOFs重量轻，在与气体吸附相关的应用中具有重量优势。在本研究中，我们展示了一种微孔MOF（命名为HIAM-111）的成功构建，它仅通过使用八羧酸连接体由钠离子构建而成。HIAM-111的结构基于8连接的钠簇，呈现出一种具有潜在3,4,8-c网络的新型拓扑结构。值得注意的是，HAM-111拥有一个坚固且高度多孔的框架，其BET表面积为1561 m²/g，显著超过了先前报道的钠基MOFs。进一步的研究表明，HIAM-111能够分离CH₄/CO₂，并以高吸附容量直接从CH₄/C₂H₆/C₃H₈中提纯CH₄。目前的工作可能为基于碱金属的坚固且多孔的MOFs的合理设计提供思路。
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