C2-phenyl-substituted benzimidazolium-based covalent organic framework as efficient catalyst for CO_(2) conversion without solvents,metals,and cocatalysts  

作　　者：Zhenzhen Wu Jing Wang Lili Liu Shang Guo Juan Li Xianming Zhang 

机构地区：[1]Shanxi Institute for Functional Food,Shanxi Agricultural University,Taiyuan,030031,China [2]Institute of Crystalline Materials,Shanxi University,Taiyuan,030006,China [3]Key Laboratory of Interface Science and Engineering in Advanced Materials,College of Chemistry,Taiyuan University of Technology,Taiyuan,030024,China

出　　处：《Science China Chemistry》2024年第2期551-557,共7页中国科学（化学英文版）

基　　金：supported by the National Natural Science Foundation of China (21805173,52273208);Shanxi Agricultural University (SXBYKY2022078,2021BQ120);Shanxi Scholarship Council of China (2022-004);the Natural Science Foundation of Shanxi Province (202203021211289)。

摘　　要：Covalent organic frameworks(COFs) are a potential platform for carbon dioxide(CO_(2)) conversion owing to their periodic permanent porosity,adjustable structure,and chemical stability.For good catalytic performance in CO_(2) conversion,collaborative multifunctions should be strategically integrated into the catalytic system design and construction.In this study,a four-in-one high-efficiency catalyst was synthesized and tested for CO_(2) cycloaddition to form cyclic carbonate.The obtained Tp-MPB-BrCOF had a high nitrogen content,which enhanced its CO_(2) affinity through substantial Lewis acid-base or dipole-quadrupole interactions;moreover,the acid(protons transferring from oxygen(–OH) to nitrogen(–NH)),hydrogen bond donor(hydroxyl group),and Br-(nucleophile group) served as three active sites,further improving the catalyst activity.These results provide a basis for designing efficient and stable CO_(2)-conversion catalysts.

关 键 词：covalent organic framework C2-phenyl-substituted benzimidazolium CO_(2)conversion four-in-one catalyst 

分 类 号：TQ426[化学工程]