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Separation of Acetylene from Carbon Dioxide and Ethylene by a Water‐Stable Microporous Metal–Organic Framework with Aligned Imidazolium Groups inside the Channels
Author(s) -
Lee Jaechul,
Chuah Chong Yang,
Kim Jaheon,
Kim Youngsuk,
Ko Nakeun,
Seo Younggyu,
Kim Kimoon,
Bae Tae Hyun,
Lee Eunsung
Publication year - 2018
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201804442
Subject(s) - acetylene , microporous material , ethylene , metal organic framework , sorption , adsorption , chemistry , cationic polymerization , chemical engineering , molecule , gas separation , carbon fibers , metal , carbon dioxide , inorganic chemistry , materials science , organic chemistry , photochemistry , membrane , catalysis , composite number , biochemistry , engineering , composite material
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.