Rational design of imine-linked three-dimensional mesoporous covalent organic frameworks with bor topology  

作　　者：Zonglong Li Chouhung Hsueh Zhuozhuo Tang Jia Chen Xiaolin Wang Hao Cui Yang Yang Xiaodan Wang Dongsheng Ren Hongqiang Gao Mingyang Li Hong Xu Xiangming He 

机构地区：[1]Institute of Nuclear and New Energy Technology,Tsinghua University,Beijing,China

出　　处：《SusMat》2022年第2期197-205,共9页可持续发展材料（英文）

基　　金：National Natural Science Foundation of China,Grant/Award Number:52073161;Tsinghua Initiative Scientific Research Program,Grant/Award Number:2021Z11GHX010。

摘　　要：Three-dimensional(3D)covalent organic frameworks(COFs)possess great potential applications in various fields.Constructing 3D COFs with large pore sizes is extremely challenging due to the interpenetration and collapse.Herein,we report a series of crystalline imine-linked 3D COFs(3D-bor-COF-1,3D-borCOF-2,3D-bor-COF-3)with mesoporous channels through rationally designing the topology configuration.These 3D-bor-COFs display permanent porosity and Brunauer–Emmett–Teller(BET)surfaces of 3205.5,1752.7,and 2077.3 m2 g−1(SLangmuir=4277.7,2480.3,and 2698.0 m2 g−1),respectively.The pore sizes of 3Dbor-COFs were confirmed by the lattice fringes from high-resolution transmission electron microscopy,as well as structural simulation and nitrogen adsorption isotherm analysis.3D-bor-COFs display large pore sizes(3.8 nm for 3D-borCOF-3),which is among the highest record of 3D COFs.Owing to the unstackedaromatic pore environment and high specific surface area,3D-bor-COFs display excellent adsorption capacity for benzene vapor(1203.9 mg g−1 for 3D-bor-COF-3)under 298 K,which is three times higher than that of the best-reported 2D COF.This work not only provides inspiration for designing 3D mesoporous imineCOFs,but also demonstrates a strategy for constructing aromatics adsorption materials.

关 键 词：benzene vapor uptake covalent organic framework large pore size lattice fringes topology configuration 

分 类 号：O64[理学—物理化学]