共价有机骨架(COFs)是通过共价键构建的新型有机多孔材料,具有可预先设计的拓扑的优点,可调孔径和丰富的活性位点。许多研究表明,COFs在气体吸附中表现出巨大的潜力,分子分离,催化作用,药物输送,储能,等。然而,本征COF的电子和空穴容易在传输中复合,并且载流子寿命很短。供体-受体(D-A)型COF,通过将D和A单元引入COF主链来合成,结合分离的电子和空穴迁移途径,D-A型聚合物具有COFs的独特优势,近年来在相关研究中取得了较大进展。这里,首先概述了D-A型COFs的合成策略,包括链接和D-A单元的合理设计以及功能化方法。然后介绍了D-A型COFs在催化反应中的应用,系统总结了光热疗法和电子材料。在最后一节,当前的挑战,并提出了D-A型COF发展的新方向。本文受版权保护。保留所有权利。
Covalent organic frameworks (COFs) are new organic porous materials constructed by covalent bonds, with the advantages of pre-designable topology, adjustable pore size, and abundant active sites. Many research studies have shown that COFs exhibit great potential in gas adsorption, molecular separation, catalysis, drug delivery, energy storage, etc. However, the electrons and holes of intrinsic COF are prone to compounding in transport, and the carrier lifetime is short. The donor-acceptor (D-A) type COFs, which are synthesized by introducing D and A units into the COFs backbone, combine separated electron and hole migration pathway, tunable band gap and optoelectronic properties of D-A type polymers with the unique advantages of COFs and have made great progress in related research in recent years. Here, the synthetic strategies of D-A type COFs are first outlined, including the rational design of linkages and D-A units as well as functionalization approaches. Then the applications of D-A type COFs in catalytic reactions, photothermal therapy, and electronic materials are systematically summarized. In the final section, the current challenges, and new directions for the development of D-A type COFs are presented.