Three-in-One C 2 H 2 -Selectivity-Guided Adsorptive Separation across an Isoreticular Family of Cationic Square-Lattice MOFs

Energy-efficient selective physisorption driven C H separation from industrial C2-C1 impurities such as C H , CO and CH is of great importance in the purification of downstream commodity chemicals. We address this challenge employing a series of isoreticular cationic metal-organic frameworks, namely...

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Bibliographic Details
Published inAngewandte Chemie International Edition Vol. 61; no. 4; p. e202114132
Main Authors Dutta, Subhajit, Mukherjee, Soumya, Qazvini, Omid T, Gupta, Arvind K, Sharma, Shivani, Mahato, Debanjan, Babarao, Ravichandar, Ghosh, Sujit K
Format Journal Article
LanguageEnglish
Published Germany 21.01.2022
Subjects
ultramicroporous MOFs
physisorption
acetylene
cationic frameworks
metal-organic frameworks
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Summary:Energy-efficient selective physisorption driven C H separation from industrial C2-C1 impurities such as C H , CO and CH is of great importance in the purification of downstream commodity chemicals. We address this challenge employing a series of isoreticular cationic metal-organic frameworks, namely iMOF-nC (n=5, 6, 7). All three square lattice topology MOFs registered higher C H uptakes versus the competing C2-C1 gases (C H , CO and CH ). Dynamic column breakthrough experiments on the best-performing iMOF-6C revealed the first three-in-one C H adsorption selectivity guided separation of C H from 1:1 C H /CO , C H /C H and C H /CH mixtures. Density functional theory calculations critically examined the C H selective interactions in iMOF-6C. Thanks to the abundance of square lattice topology MOFs, this study introduces a crystal engineering blueprint for designing C H -selective layered metal-organic physisorbents, previously unreported in cationic frameworks.
ISSN:1433-7851
1521-3773
DOI:10.1002/anie.202114132