Microporous Metal‐Containing Hydrogen‐Bonded Organic Frameworks with Benchmark C <sub>2</sub> H <sub>2</sub> Storage Density for Efficient C <sub>2</sub> H <sub>2</sub> /C <sub>2</sub> H <sub>4</sub> and C <sub>2</sub> H <sub>2</sub> /CO <sub>2</sub> Separations
Abstract
Abstract Separation of C 2 H 2 from industrially important gas pairs using energy‐efficient adsorptive techniques with multifunctional porous materials remains a significant yet challenging issue. Here, we report the highly efficient separation of C 2 H 2 /CO 2 and C 2 H 2 /C 2 H 4 mixtures with isostructural metal‐containing hydrogen‐bonded organic frameworks (M–HOFs), which feature micropore channels decorated with high‐density and uncoordinated carboxyl groups. Single‐crystal X‐ray diffraction analysis reveals that each free carboxyl group is capable of trapping one C 2 H 2 molecule through hydrogen bonding. This endows the M–HOFs with excellent C 2 H 2 capture capability, achieving a benchmark storage density of 396.0 mg cm −3 , while simultaneously demonstrating remarkable selectivity over C 2 H 4 (420–97) and CO 2 (188–53). Breakthrough experiments confirm that binary gas mixtures can be efficiently separated by M–HOFs, where an impressive C 2 H 4 productivity (137.4 mol kg −1 ) is realized in the separation of C 2 H 2 /C 2 H 4 (1/99), and an outstanding separation factor (17) is achieved for C 2 H 2 /CO 2 (50/50) splitting. Coupled with their superior chemical stability, these M–HOFs display tremendous potential for practical applications.
Article Details
Authors (14)
Jiali Fu
Qingxue Hui
Yu‐Hao Gu
State Key Laboratory of Coordination Chemistry School of Chemistry and Chemical Engineering Nanjing University Nanjing China
Qi Ding
Haoning Xu
State Key Laboratory of Coordination Chemistry School of Chemistry and Chemical Engineering Nanjing University Nanjing 210023 China
Biao Yang
State Key Laboratory of Fine Chemicals, Frontiers Science Center for Smart Materials Oriented Chemical Engineering, School of Chemical Engineering
Chengyu Huangfu
State Key Laboratory of Coordination Chemistry School of Chemistry and Chemical Engineering Nanjing University Nanjing 210023 China
Qingqing Wang
Institute of Immunology, Zhejiang University School of Medicine
Xin‐Li Liu
State Key Laboratory of Coordination Chemistry School of Chemistry and Chemical Engineering Nanjing University Nanjing 210023 China
Xin‐Yi Wang
Fujian Provincial Key Laboratory of Advanced Inorganic Oxygenated‐Materials Fujian Provincial Key Laboratory of Cancer Metastasis Chemoprevention and Chemotherapy College of Chemistry Fuzhou University Fuzhou Fujian 350108 P.R. China
Youting Wu
Key Laboratory of Mesoscopic Chemistry of MOE School of Chemistry and Chemical Engineering Nanjing University Nanjing 210023 China
Xingbang Hu
MOE Key Laboratory of Mesoscopic Chemistry, Nanjing University, Nanjing, Jiangsu 210023, China
Shuai Yuan
State Key Laboratory of Coordination Chemistry, Key Laboratory of Mesoscopic Chemistry of MOE, Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering
Zhaoqiang Zhang
State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering