A tetraaldehyde-derived porous organic cage and covalent organic frameworks:Syntheses,structures,and iodine vapor capture  

作　　者：Xinyi Cao Yucheng Jin Hailong Wang Xu Ding Xiaolin Liu Baoqiu Yu Xiaoning Zhan Jianzhuang Jiang 

机构地区：[1]Beijing Advanced Innovation Center for Materials Genome Engineering,Beijing Key Laboratory for Science and Application of Functional Molecular and Crystalline Materials,Department of Chemistry and Chemical Engineering,School of Chemistry and Biological Engineering,University of Science and Technology Beijing,Beijing 100083,China

出　　处：《Chinese Chemical Letters》2024年第9期426-431,共6页中国化学快报（英文版）

基　　金：financially supported by the Natural Science Foundation of China(Nos.22235001,22175020,22131005,and 22261132512);Xiaomi Young Scholar Program;the Fundamental Research Funds for the Central Universities;University of Science and Technology Beijing。

摘　　要：Dynamic covalent imine reactions between 2,3-dimethoxy-[1,1:4,1-terphenyl]-3,3,5,5-tetracarbaldehyde(DMTT)and cyclohexanediamine,p-phenylenediamine,and benzidine,respectively,generate a porous organic cage(DMPOC)and two covalent organic frameworks(COFs),USTB-29,and USTB-30.DMPOC shows a[3+6]topological cage-like structure according to single crystal X-ray diffraction result.In contrast,both microcrystalline USTB-29 and USTB-30 exhibit two-dimensional monoporous structures in an eclipsed AA stacking style based on powder X-ray diffraction and theoretical simulations.In addition,DMPOC is capable of efficiently absorbing the iodine vapor with an outstanding uptake of 5.10 g/g,much higher than that of USTB-29(3.07 g/g)and USTB-30(3.16 g/g).Cage to COFs transformations have been realized from DMPOC to USTB-29 and USTB-30 via the imine bond exchange with slightly increased iodine vapor uptake.Mechanism investigations uncover that both nitrogen and oxygen atoms of POC and COFs contribute to iodine vapor capture due to the formation of charge transfer matter,and loose interaction introducing adaptive expanding voids of DMPOC is suggested to capture more iodine vapor than that of COFs with strongπ-πinteractions.

关 键 词：Porous organic cage Crystal structure Covalent organic framework Transformation Iodine vapor adsorption 

分 类 号：O641.4[理学—物理化学] O647.3[理学—化学]