Guo Xinghua, Li Yang, Zhang Meicheng, Cao Kecheng, Tian Yin, Qi Yue, Li Shoujian, Li Kun, Yu Xiaoqi, Ma Lijian
College of Chemistry, Sichuan University, Key Laboratory of Radiation Physics & Technology, Ministry of Education, No. 29 Wangjiang Road, Chengdu, 610064, P. R. China.
Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, Anhui, 230026, P. R. China.
Angew Chem Int Ed Engl. 2020 Dec 7;59(50):22697-22705. doi: 10.1002/anie.202010829. Epub 2020 Oct 2.
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 ) for iodine than traditional 2D COFs, with an unprecedented maximum adsorption capacity of 6.29 g g . 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.
在二维共价有机框架（COF）上构建三维（3D）结构特征是有效提高材料渗透性和传质速率并实现客体分子快速吸附的良好方法，同时避免了制备三维COF时的高成本和单体稀缺问题。在此，我们首次报道了一系列具有准三维（Q-3D）拓扑结构的棒状结晶二维COF，其由独特的“立体”三角形孔、大层间距和柔性结构单元组成，这些结构单元使孔具有弹性且能自适应客体传输。所制备的QTD-COF对碘的吸附速率（2.51 g h）比传统二维COF更快，具有前所未有的6.29 g g的最大吸附容量。优异的吸附性能以及突出的辐照稳定性使QTD-COF可用于快速去除放射性碘。
