Two-dimensional (2D) imine-linked covalent organic frameworks (COFs) have attracted great interest for gas uptake, catalysis, drug delivery, electronic devices, and photocatalytic applications. The synthetic methodologies involved in imine-linked COF formations such as solvothermal synthesis usually require harsh experimental conditions. In this work, we show for the first time how highly crystalline COFs with very high surface areas (3.6 times higher than using conventional approaches) can be prepared by combining a mechanochemical and crystallization approach. More importantly, this facile method is a general route to novel composites of COF and metal oxides including Fe₃O₄, Co₃O₄, and NiO. The composites can be used as magnetically recoverable adsorbents and show a strong redox-activity making them interesting for applications in electrochemical energy storage.

中文翻译：

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高表面积共价有机骨架及其金属氧化物复合材料作为磁可回收吸附剂和储能的一般途径

二维 (2D) 亚胺连接的共价有机框架 (COF) 在气体吸收、催化、药物输送、电子器件和光催化应用方面引起了极大的兴趣。与亚胺连接的 COF 形成有关的合成方法，例如溶剂热合成，通常需要苛刻的实验条件。在这项工作中，我们首次展示了如何通过结合机械化学和结晶方法来制备具有非常高表面积（比使用传统方法高 3.6 倍）的高结晶 COF。_{更重要的是，这种简便的方法是制备 COF 和金属氧化物（包括 Fe 3} O ₄、Co ₃ O ₄）的新型复合材料的一般途径, 和 NiO。该复合材料可用作磁性可回收吸附剂，并显示出强大的氧化还原活性，使其在电化学储能应用中具有重要意义。