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A MOF‐based Ultra‐Strong Acetylene Nano‐trap for Highly Efficient C 2 H 2 /CO 2 Separation
Author(s) -
Niu Zheng,
Cui Xili,
Pham Tony,
Verma Gaurav,
Lan Pui Ching,
Shan Chuan,
Xing Huabin,
Forrest Katherine A.,
Suepaul Shanelle,
Space Brian,
Nafady Ayman,
AlEnizi Abdullah M.,
Ma Shengqian
Publication year - 2021
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.202016225
Subject(s) - acetylene , molecule , crystallography , materials science , selectivity , nano , analytical chemistry (journal) , crystal (programming language) , chemistry , catalysis , organic chemistry , composite material , computer science , programming language
Porous materials with open metal sites have been investigated to separate various gas mixtures. However, open metal sites show the limitation in the separation of some challenging gas mixtures, such as C 2 H 2 /CO 2 . Herein, we propose a new type of ultra‐strong C 2 H 2 nano‐trap based on multiple binding interactions to efficiently capture C 2 H 2 molecules and separate C 2 H 2 /CO 2 mixture. The ultra‐strong acetylene nano‐trap shows a benchmark Q st of 79.1 kJ mol −1 for C 2 H 2 , a record high pure C 2 H 2 uptake of 2.54 mmol g −1 at 1×10 −2 bar, and the highest C 2 H 2 /CO 2 selectivity (53.6), making it as a new benchmark material for the capture of C 2 H 2 and the separation of C 2 H 2 /CO 2 . The locations of C 2 H 2 molecules within the MOF‐based nanotrap have been visualized by the in situ single‐crystal X‐ray diffraction studies, which also identify the multiple binding sites accountable for the strong interactions with C 2 H 2 .