Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 59, Issue 50, Pages 22697-22705Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.202010829
Keywords
adsorption; covalent organic frameworks (COFs); iodine; mass transfer; quasi-three-dimensional
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Funding
- National Natural Science Foundation of China [21771128, 21976125]
- Science Challenge Project [TZ2016004]
- Sichuan Science and Technology Program [2020JDRC0014]
- China Postdoctoral Science Foundation [2020M671906]
- Comprehensive training platform of specialized laboratory College of chemistry, Sichuan University
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Constructing three-dimensional (3D) structural characteristics on two-dimensional (2D) covalent organic frameworks (COFs) is a good approach to effectively improve the permeability and mass transfer rate of the materials and realize the rapid adsorption for guest molecules, while avoiding the high cost and monomer scarcity in preparing 3D COFs. Herein, we report for the first time a series of colyliform crystalline 2D COFs with quasi-three-dimensional (Q-3D) topologies, consisting of unique stereoscopic triangular pores, large interlayer spacings and flexible constitutional units which makes the pores elastic and self-adaptable for the guest transmission. The as-prepared QTD-COFs have a faster adsorption rate (2.51 g h(-1)) for iodine than traditional 2D COFs, with an unprecedented maximum adsorption capacity of 6.29 g g(-1). The excellent adsorption performance, as well as the prominent irradiation stability allow the QTD-COFs to be applied for the rapid removal of radioactive iodine.
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