Rational Creation of the Second Xe-Matched Adsorption Site in a Covalent Organic Framework via a Digging-Patching Strategy for Simultaneously Boosting Xe Uptake and Xe/Kr Selectivity

Journal of the American Chemical Society 2026

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Authors: Xiaojiang Xu, Han Ren, Li Wang, Huifang Ma, X H Liu, Mingbiao Luo, 刘庆燕, Yuling Wang, Rajamani Krishna, Banglin Chen, Feng Luo
DOI: 10.1021/jacs.6c00584
Cited by: 3
References: 64

Abstract

/g. As a result, we observed a large enhancement in both Xe uptake and selectivity from 1.37 to 2.29 mmol/g and from 14.6 to 22.0. It was found that structural design by the digging (D) operation in the DP strategy functions to create dual adsorption sites for Xe, which helps to improve Xe uptake, while the patching (P) operation functions to optimize the second adsorption site with its size close to the kinetic diameters of Xe, which helps to improve Xe/Kr selectivity, finally breaking the inherent trade-off between Xe uptake and Xe/Kr selectivity. The actual Xe-Kr separation capability was further confirmed by breakthrough experiments. This work highlights a fundamental structural design of two-dimensional COFs for size-based gas separation.

Fields of Study & Subjects

Covalent Organic Framework Applications Metal-Organic Frameworks: Synthesis and Applications Carbon Dioxide Capture Technologies

Publication details

Journal / source
Journal of the American Chemical Society
Publisher
American Chemical Society (ACS)
Volume
148
Issue
18
Pages
18859–18868
Publication date
30 April 2026
Language
EN