溶剂
分子
乙醚
金属有机骨架
多孔性
等结构
乙腈
化学
配体(生物化学)
灵活性(工程)
单晶
晶体结构
化学工程
结晶学
纳米技术
材料科学
有机化学
生物化学
统计
受体
数学
吸附
工程类
作者
Dario Giovanardi,Paolo P. Mazzeo,Paolo Pelagatti,Alessia Bacchi
标识
DOI:10.1021/acs.cgd.3c00869
摘要
Metal–organic frameworks (MOFs) keep attracting the attention of many research groups worldwide who are aiming at using them as crystalline sponges, thus loading their porous structures with any kind of molecules of interest. Among other desiderata, framework flexibility is the golden property that an MOF must have to adapt its structure throughout the loading and release process of guest molecules. Here, we highlight the flexibility of a breathing MOF by soaking the crystals of the mixed-ligand MOF PUM168 into different solvents, ranging from acetonitrile (ACN) to THF and diethyl ether, revealing a systematic framework twisting observed via single-crystal-to-single-crystal transformations during the DMF–solvent exchange. Reversible chemical pathways have successfully been reported and confirmed via FT-IR and 1H NMR. Soaking in ACN resulted in the most effective strategy in terms of the solvent-exchange activation of the pristine MOF, leading to a complete extrusion of the native solvent from the structure while keeping the porous channels widely open.
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