设计合成大孔道和高CO2吸附的羧基功能化3D共价有机框架材料

共价有机框架材料（Covalent Organic Framework, COF）作为一种新兴的晶态有机多孔材料，其具有长程有序的孔道、孔道结构易修饰等优点。尤其是，三维COF材料可以通过结构设计来获得高比表面积、特定的孔道结构及丰富的功能位点。但目前文献报道的三维COF材料多数存在脱除客体分子孔道坍塌和框架结构穿插等难题，从而造成实际比表面积及孔隙率远低于理论值的问题。本项目主要是通过空间位阻效应合成羧基功能化的三维COF材料来消除孔道坍塌及结构穿插的现象，从而获得大孔道和高比表面积的材料，进而探究该类材料在二氧化碳吸附等方面的潜在应用。

Covalent Organic Framework (COF) as an emerging crystalline organic porous material has the advantages of long-range ordered pores, easy functionalization, and so on. In particular, 3D COF materials can be obtained high specific surface areas, rich pores and functional sites through structural design. However, most 3D COFs reported so far have some issues. For example, the pore structures easily collapse after removal of guest molecules, and the frameworks tend to intersperse, resulting in the problem that the actual surface areas and porosity are far lower than the theoretical values. Therefore, we will focus on the design and synthesis of carboxyl-group functionalized 3D COFs through steric hindrance engineering to suppress dynamic behavior and structural interpenetration, which will prepare novel materials with large channels and high surface areas. Furthermore, we will explore the potential applications of such materials in carbon dioxide adsorption.