化学
共价键
尿素
共价有机骨架
氢键
分子
联苯
高分子化学
有机化学
作者
Chenfei Zhao,Christian S. Diercks,Chenhui Zhu,Nikita Hanikel,Xiaokun Pei,Omar M. Yaghi
摘要
2D covalent organic frameworks (COFs) with flexible urea linkages have been synthesized by condensation of 1,3,5-triformylphloroglucinol (TFP) with 1,4-phenylenediurea (BDU) or 1,1′-(3,3′-dimethyl-[1,1′-biphenyl]-4,4′-diyl)diurea (DMBDU). The resulting COF-117 and COF-118 undergo reversible structural dynamics within their layers, in response to inclusion and removal of guest molecules, emanating from urea C—N bond rotation and interlayer hydrogen-bonding interactions. These compounds are the first urea-linked COFs, serving to expand the scope of reticular chemistry.
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