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Robust Ultramicroporous Metal–Organic Frameworks with Benchmark Affinity for Acetylene
Author(s) -
Peng YunLei,
Pham Tony,
Li Pengfei,
Wang Ting,
Chen Yao,
Chen KaiJie,
Forrest Katherine A.,
Space Brian,
Cheng Peng,
Zaworotko Michael J.,
Zhang Zhenjie
Publication year - 2018
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.201806732
Subject(s) - acetylene , chemisorption , selectivity , metal organic framework , materials science , chemical engineering , fourier transform infrared spectroscopy , metal , chemistry , organic chemistry , catalysis , adsorption , engineering
Abstract Highly selective separation and/or purification of acetylene from various gas mixtures is a relevant and difficult challenge that currently requires costly and energy‐intensive chemisorption processes. Two ultramicroporous metal–organic framework physisorbents, NKMOF‐1‐M (M=Cu or Ni), offer high hydrolytic stability and benchmark selectivity towards acetylene versus several gases at ambient temperature. The performance of NKMOF‐1‐M is attributed to their exceptional acetylene binding affinity as revealed by modelling and several experimental studies: in situ single‐crystal X‐ray diffraction, FTIR, and gas mixture breakthrough tests. NKMOF‐1‐M exhibit better low‐pressure uptake than existing physisorbents and possesses the highest selectivities yet reported for C 2 H 2 /CO 2 and C 2 H 2 /CH 4 . The performance of NKMOF‐1‐M is not driven by the same mechanism as current benchmark physisorbents that rely on pore walls lined by inorganic anions.