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Colyliform Crystalline 2D Covalent Organic Frameworks (COFs) with Quasi‐3D Topologies for Rapid I 2 Adsorption
Author(s) -
Guo Xinghua,
Li Yang,
Zhang Meicheng,
Cao Kecheng,
Tian Yin,
Qi Yue,
Li Shoujian,
Li Kun,
Yu Xiaoqi,
Ma Lijian
Publication year - 2020
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.202010829
Subject(s) - adsorption , monomer , covalent bond , chemical engineering , molecule , materials science , nanotechnology , chemistry , organic chemistry , polymer , composite material , engineering
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.