Porous hydrophobic materials are very attractive for practical use. Reported herein is a facile strategy that transforms imine-linked covalent organic frameworks (COFs) into porous quinoline-linked aromatic frameworks by an aza-Diels-Alder reaction of COF-LZU1 and enamides for the first time. The chemically modified superhydrophobic COF-Q-CF₃ not only retained crystallinity and porosity, but also displayed dramatically enhanced oil adsorption as well as water-in-oil emulsion separation performance with excellent separation efficiency. Additionally, it also exhibited selective C₂H₂ adsorption at 273 K and 1 bar. This protocol constitutes a step for expanding the scope of COF applications in oil spill remediation and separation.

多孔疏水材料对实际应用非常有吸引力。本文报道了一种简便的策略，该策略首次通过 COF-LZU1 和烯酰胺的氮杂-狄尔斯-阿尔德反应将亚胺连接的共价有机骨架 (COF) 转化为多孔喹啉连接的芳香骨架。化学改性的超疏水COF-Q-CF ₃不仅保留了结晶度和孔隙率，而且表现出显着增强的油吸附和油包水乳液分离性能，具有优异的分离效率。此外，它还在 273 K 和 1 bar 下表现出选择性 C ₂ H _2吸附。该协议构成了扩大 COF 在溢油修复和分离中的应用范围的一步。