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Confined growth of ordered organic frameworks at an interface.
Chemical Society Reviews ( IF 46.2 ) Pub Date : 2020-06-29 , DOI: 10.1039/c9cs00879a
Yinghua Jin 1 , Yiming Hu , Michael Ortiz , Shaofeng Huang , Yanqing Ge , Wei Zhang
Affiliation  

Given their modular synthesis, unique structural features and rich functionality, structurally ordered covalent organic frameworks (COFs) and covalent monolayers have shown great potential in a broad range of applications, such as catalysis, molecular separation, energy storage, light harvesting, etc. The synthesis of COF thin films and covalent monolayers mainly utilizes dynamic covalent chemistry (DCvC), which relies on the reversible formation and breaking of rather strong covalent bonds within molecules under certain external stimuli. Such reversible reaction conditions enable a self-correction mechanism, which can selectively resolve defect sites leading to the formation of highly ordered COF films under thermodynamic control. Novel techniques to obtain single-layer covalent nanosheets have spread throughout recent literature. Emerging interfacial polymerization techniques (e.g., air–water, liquid–liquid, liquid–solid, etc.) have been employed to successfully synthesize crystalline COF thin films from a variety of starting building blocks. Although the growth of ordered frameworks at the interface represents a rapidly developing field, the reversible reactions suitable for the synthesis of thin films or monolayers are still very limited. The identification and development of new dynamic reactions and interfacial polymerization conditions would be critical for the further development of COF thin films and covalent monolayer materials. This review covers the recent design and synthesis of COF thin films and covalent monolayers as well as their property study. The fundamental working mechanisms of different surface and interfacial polymerization and the current challenges and opportunities in this rapidly growing field are presented.

中文翻译:

在界面上限制有序有机框架的增长。

鉴于其模块化的合成,独特的结构特征和丰富的功能,结构有序的共价有机骨架(COF)和共价单层在广泛的应用领域中显示出巨大潜力,例如催化,分子分离,能量存储,光收集等。COF薄膜和共价单层的合成主要利用动态共价化学(DCvC),它依赖于在某些外部刺激下分子内相当强的共价键的可逆形成和断裂。这种可逆的反应条件实现了自我校正机制,该机制可以在热力学控制下选择性解决缺陷位点,从而导致形成高度有序的COF膜。获得单层共价纳米片的新技术已遍及最新文献。新兴的界面聚合技术(例如,空气-水,液体-液体,液体-固体等))已被用于成功地从各种起始构件合成晶体COF薄膜。尽管在界面处有序骨架的生长代表了快速发展的领域,但是适于合成薄膜或单层的可逆反应仍然非常有限。新动态反应和界面聚合条件的鉴定和开发对于COF薄膜和共价单层材料的进一步开发至关重要。这篇综述涵盖了COF薄膜和共价单层膜的最新设计和合成及其性能研究。介绍了不同表面和界面聚合的基本工作机理,以及在这个快速增长的领域中当前面临的挑战和机遇。
更新日期:2020-07-21
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