Separation of Acetylene from Carbon Dioxide and Ethylene by a Water‐Stable Microporous Metal–Organic Framework with Aligned Imidazolium Groups inside the Channels. (16th May 2018)

• Record Type: Journal Article
• Authors: Lee, Jaechul; Chuah, Chong Yang; Kim, Jaheon; Kim, Youngsuk; Ko, Nakeun; Seo, Younggyu; Kim, Kimoon; Bae, Tae Hyun; Lee, Eunsung
• Is Part Of: Angewandte Chemie. Volume 130:Number 26(2018)
• Page Start: 7995
• Page End: 7999
• Publication Date: 2018-05-16
• Subjects: Acetylen -- Gastrennung -- Imidazolium -- Ionische Flüssigkeiten -- Metall-organische Gerüste; Chemistry -- Periodicals; 540
• DOI: 10.1002/ange.201804442
• Languages: English
• ISSNs: 0044-8249

Abstract

Abstract: 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 namedJCM‐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 inJCM‐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.