Research progress of synthesis and application of covalent organic frameworks
Covalent organic frameworks(COFs)are organic porous materials with periodic network structure formed by the orderly connection of C,B,N,O,etc.light elements through strong covalent bonds.They have the advantages of large specific surface area,low density,ordered pore structure and easy to modify,diverse structure and good stability,which have been widely used in many fields.This review introduced the structure of COFs,mainly summarized the progress of boric acid polycondensation,C-C coupling,Schiff base,cyano self-polymerization and aryl ether polymerization for the synthesis of COFs,and introduced the main preparation methods of COFs,such as solvothermal,microwave,ion-thermal,mechanical grinding,interfacial synthesis,microfluidics and post-synthetic modification methods.At the same time,it also discussed the characterization of the structure of COFs.In addition,the application of COFs in gas adsorption and separation,photocatalysis,electrocatalysis,asymmetric catalytic synthesis and chiral separation and electrochemical energy storage was also summarized and discussed.Finally,the opportunities and challenges of the synthesis and application of COFs were prospected.It was hoped to provide useful reference and inspiration for the further in-depth study of COFs.
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