Affiliation:
1. Fujian Provincial Key Laboratory of Polymer Materials College of Chemistry and Materials Science Fujian Normal University Fuzhou 350117 China
Abstract
AbstractHydrogen‐bonded organic frameworks (HOFs) have been emerging as a new type of very promising microporous materials for gas separation and purification, but few HOFs structures constructed through hydrogen‐bonding tetramers have been explored in this field. Herein, we report the first microporous HOF (termed as HOF‐FJU‐46) afforded by hydrogen‐bonding tetramers with 4‐fold interpenetrated diamond networks, which shows excellent chemical and thermal stability. What's more, activated HOF‐FJU‐46 exhibits the highest xenon (Xe) uptake of 2.51 mmol g−1 and xenon/krypton (Kr) selectivity of 19.9 at the ambient condition among the reported HOFs up to date. Dynamic breakthrough tests confirmed the excellent Xe/Kr separation of HOF‐FJU‐46a, showing high Kr productivity (110 mL g−1) and Xe uptake (1.29 mmol g−1), as well as good recyclability. The single crystal X‐ray diffraction and the molecular simulations revealed that the abundant accessible aromatic and pyrazole rings in the pore channels of HOF‐FJU‐46a can provide the multiple strong C−H⋅⋅⋅Xe interactions with Xe atoms.
Funder
National Natural Science Foundation of China
Fujian Provincial Department of Science and Technology
Subject
General Chemistry,Catalysis