共价有机骨架
萘
共价键
结晶度
化学
单体
共轭体系
光电导性
位阻效应
结晶学
立体化学
高分子化学
材料科学
有机化学
聚合物
光电子学
作者
Yusen Li,Xi Su,Wenhao Zheng,Jiajia Zheng,Linshuo Guo,Mischa Bonn,Xingfa Gao,Hai I. Wang,Long Chen
标识
DOI:10.1002/anie.202216795
摘要
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, C60 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 C60 @m-Naph-COF composite exhibits much higher photoconductivity than the m-Naph-COF owing to charge transfer between the conjugated skeletons and C60 guests.
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