Covalent organic frameworks (COFs) are a rapidly emerging class of crystalline porous polymers, characterized by their highly defined, predictable, and tunable structure, porosity, and properties. COFs can form both two-dimensional (2D) and three-dimensional (3D) architectures, each with unique characteristics and potential applications. 2D COFs have attracted particular interest due to their favorable structural and optoelectronic properties. They can be equipped with a range of different functional moieties in their backbone, ranging from acidic to basic, from hydrophilic to hydrophobic, and from metal-coordinating to redox-active functions. In addition, their crystallinity, high specific surface area, and remarkable thermal and chemical stability make them attractive for a variety of applications, including gas separation, catalysis, energy storage, and optoelectronics.

中文翻译：

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二维共价有机框架：不同长度尺度的结构见解及其对光催化效率的影响


共价有机框架 （COF） 是一类迅速崛起的结晶多孔聚合物，其特点是其高度明确、可预测和可调的结构、孔隙率和特性。COF 可以形成二维 （2D） 和三维 （3D） 架构，每种架构都有独特的特性和潜在应用。2D COF 因其良好的结构和光电特性而引起了特别的兴趣。它们的主链中可以配备一系列不同的功能部分，从酸性到碱性，从亲水到疏水，从金属配位到氧化还原活性功能。此外，它们的结晶度、高比表面积以及出色的热稳定性和化学稳定性使它们对各种应用具有吸引力，包括气体分离、催化、储能和光电子学。