Liao Yaozu, Li Jiahuan, Thomas Arne
State Key Laboratory for Modification of Chemical Fibers and Polymer Materials & College of Materials Science and Engineering, Donghua University, Shanghai 201620, China.
Department of Chemistry, Functional Materials, Technische Universität Berlin, Berlin 10623, Germany.
ACS Macro Lett. 2017 Dec 19;6(12):1444-1450. doi: 10.1021/acsmacrolett.7b00849. Epub 2017 Dec 7.
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 FeO, CoO, 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.
二维（2D）亚胺连接的共价有机框架（COF）在气体吸附、催化、药物递送、电子器件和光催化应用等方面引起了极大的关注。亚胺连接的COF形成过程中所涉及的合成方法，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机械化学和结晶方法的结合来制备具有非常高比表面积（比传统方法高3.6倍）的高结晶度COF。更重要的是，这种简便的方法是制备包括FeO、CoO和NiO在内的COF与金属氧化物新型复合材料的通用途径。这些复合材料可用作磁性可回收吸附剂，并表现出很强的氧化还原活性，使其在电化学储能应用中具有吸引力。
