A Visible Light Responsive Smart Covalent Organic Framework with a Bridged Azobenzene Backbone
Liang Sheng Qiang, Hao Bai, Xinyi Li, Hailin Yang, Cheng‐bin Gong, Qian Tang
Abstract
Condensation of 3,3'-diamino-2,2'-ethylene-bridged azobenzene with 1,2,4,5-tetrakis-(4-formylphenyl) benzene produces a visible light responsive porous 2D covalent organic framework, COF-bAzo-TFPB, with a large surface area, good crystallinity, and thermal and chemical stability. The results demonstrate that the elaborated designed linker can make azo unit on the COF-bAzo-TFPB skeleton undergo reversible photoisomerization. This work expands the application scope of covalent organic frameworks in photo-controlled release, uptake of guest molecules, dynamic photoswitching, and UV-sensitive functions.
Topics & Concepts
AzobenzenePhotoisomerizationCovalent bondCovalent organic frameworkLinkerPhotochromismMaterials scienceMoleculePhotochemistryCrystallinityPolymer chemistryChemistryChemical engineeringOrganic chemistryIsomerizationComputer scienceComposite materialOperating systemCatalysisEngineeringCovalent Organic Framework ApplicationsLuminescence and Fluorescent MaterialsMetal-Organic Frameworks: Synthesis and Applications