Separation of Acetylene from Carbon Dioxide and Ethylene by a Water-Stable Microporous Metal-Organic Framework with Aligned Imidazolium Groups inside the Channels
Separation of Acetylene from Carbon Dioxide and Ethylene by a Water-Stable Microporous Metal-Organic Framework with Aligned Imidazolium Groups inside the Channels
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DOI：
10.1002/anie.201804442
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发表时间：
2018-06-25
影响因子：
16.6
通讯作者：
Lee, Eunsung
中科院分区：
文献类型：
--
作者：
Lee, Jaechul;Chuah, Chong Yang;Lee, Eunsung
由于乙炔的尺寸和物理性质相似，因此从二氧化碳和乙烯中分离乙炔具有挑战性。金属有机框架（MOF）通常是这些分离的有力候选者，因为其存在可以选择性捕获特定目标分子的功能性孔表面。在这里，我们报道了一种名为 JCM-1 的新型 3D 微孔阳离子框架。该结构在孔表面具有咪唑鎓官能团，并具有作为金属结合基团的吡唑盐，众所周知，吡唑盐可形成牢固的金属-配体键。通过平衡气体吸附分析和动态突破测量成功证明了 JCM-1 中乙炔相对于二氧化碳和乙烯的选择性吸附。此外，其优异的水解稳定性使得分离过程高度可回收，而不会显着损失乙炔吸收能力。
Separation of acetylene from carbon dioxide and ethylene is challenging in view of their similar sizes and physical properties. Metal-organic frameworks (MOFs) in general are strong candidates for these separations owing to the presence of functional pore surfaces that can selectively capture a specific target molecule. Here, we report a novel 3D microporous cationic framework named JCM-1. This structure possesses imidazolium functional groups on the pore surfaces and pyrazolate as a metal binding group, which is well known to form strong metal-to-ligand bonds. The selective sorption of acetylene over carbon dioxide and ethylene in JCM-1 was successfully demonstrated by equilibrium gas adsorption analysis as well as dynamic breakthrough measurement. Furthermore, its excellent hydrolytic stability makes the separation processes highly recyclable without a substantial loss in acetylene uptake capacity.