State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun, 130012, China.
Key Laboratory for Special Functional Materials of Ministry of Education, School of Materials Science and Engineering, Henan University, Kaifeng, 475004, China.
Angew Chem Int Ed Engl. 2023 Mar 1;62(10):e202216795. doi: 10.1002/anie.202216795. Epub 2023 Jan 25.
Targeted synthesis of kagome (kgm) topologic 2D covalent organic frameworks remains challenging, presumably due to the severe dependence on building units and synthetic conditions. Herein, two isomeric "two-in-one" monomers with different lengths of substituted arms based on naphthalene core (p-Naph and m-Naph) are elaborately designed and utilized for the defined synthesis of isomeric kgm Naph-COFs. The two isomeric frameworks exhibit splendid crystallinity and showcase the same chemical composition and topologic structure with, however, different pore channels. Interestingly, C is able to uniformly be encapsulated into the triangle channels of m-Naph-COF via in situ incorporation method, while not the isomeric p-Naph-COF, likely due to the different pore structures of the two isomeric COFs. The resulting stable C @m-Naph-COF composite exhibits much higher photoconductivity than the m-Naph-COF owing to charge transfer between the conjugated skeletons and C guests.
目标合成 kagome (kgm) 二维共价有机骨架仍然具有挑战性，这可能是由于严重依赖于构建单元和合成条件。在此，我们设计并使用了两种基于萘核的具有不同取代臂长度的异构“一体两用”单体（p-Naph 和 m-Naph），用于定义合成异构 kgm Naph-COF。这两种异构骨架表现出极好的结晶性，并展示出相同的化学组成和拓扑结构，但具有不同的孔道。有趣的是，C 可以通过原位掺入法均匀地封装到 m-Naph-COF 的三角形孔道中，而不是异构的 p-Naph-COF，这可能是由于两种异构 COF 的孔结构不同。所得稳定的 C@m-Naph-COF 复合材料由于共轭骨架和 C 客体之间的电荷转移，表现出比 m-Naph-COF 更高的光电导率。
