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Surfactants Mediated Synthesis of Highly Crystalline Thin Films of Imine-Linked Covalent Organic Frameworks on Water Surface
Chinese Journal of Chemistry ( IF 5.5 ) Pub Date : 2021-09-01 , DOI: 10.1002/cjoc.202100493 Zhaowei Ou 1 , Zihao Liang 1 , Xin Dong 1 , Fanglin Tan 1 , Li Gong 2 , Pei Zhao 1 , Honglei Wang 1 , Armin Gölzhäuser 3 , Wei Liu 4 , Zhikun Zheng 1
Chinese Journal of Chemistry ( IF 5.5 ) Pub Date : 2021-09-01 , DOI: 10.1002/cjoc.202100493 Zhaowei Ou 1 , Zihao Liang 1 , Xin Dong 1 , Fanglin Tan 1 , Li Gong 2 , Pei Zhao 1 , Honglei Wang 1 , Armin Gölzhäuser 3 , Wei Liu 4 , Zhikun Zheng 1
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Imine-linked covalent organic frameworks (COFs) have attracted extensive attention due to designable structures, tunable properties, and excellent thermal and chemical stability. They were typically obtained as insoluble and unprocessable powders, which seriously limits their full promise. Progress has been made in the synthesis of thin films of imine-linked COFs by interfacial synthesis. However, the synthesis of highly crystalline, self-supporting thin films of COFs remains challenging. Here, we employed a surfactants-mediated method to synthesize such films at an air-water interface, showed the films could be transferred onto arbitrary substrates on demand, and demonstrated the generality of the methodology with two different COFs. We found that the length of hydrophobic segments of surfactants played a key role in determination of the crystallinity and single crystalline domain size of the films. This work provides a feasible strategy to generate highly crystalline thin films of COFs.
中文翻译：
表面活性剂介导的亚胺连接共价有机骨架高结晶薄膜在水面上的合成
亚胺连接的共价有机骨架（COFs）由于可设计的结构、可调的性能以及优异的热和化学稳定性而引起了广泛的关注。它们通常以不可溶和不可加工的粉末形式获得，这严重限制了它们的全部前景。在通过界面合成合成亚胺连接的 COF 薄膜方面取得了进展。然而，合成高度结晶、自支撑的 COFs 薄膜仍然具有挑战性。在这里，我们采用表面活性剂介导的方法在气水界面合成此类薄膜，表明薄膜可以按需转移到任意基材上，并证明了该方法与两种不同 COF 的通用性。我们发现表面活性剂疏水链段的长度在决定薄膜的结晶度和单晶域尺寸方面起着关键作用。这项工作提供了一种可行的策略来生成 COF 的高结晶薄膜。
更新日期：2021-09-01
中文翻译：
表面活性剂介导的亚胺连接共价有机骨架高结晶薄膜在水面上的合成
亚胺连接的共价有机骨架（COFs）由于可设计的结构、可调的性能以及优异的热和化学稳定性而引起了广泛的关注。它们通常以不可溶和不可加工的粉末形式获得，这严重限制了它们的全部前景。在通过界面合成合成亚胺连接的 COF 薄膜方面取得了进展。然而，合成高度结晶、自支撑的 COFs 薄膜仍然具有挑战性。在这里，我们采用表面活性剂介导的方法在气水界面合成此类薄膜，表明薄膜可以按需转移到任意基材上，并证明了该方法与两种不同 COF 的通用性。我们发现表面活性剂疏水链段的长度在决定薄膜的结晶度和单晶域尺寸方面起着关键作用。这项工作提供了一种可行的策略来生成 COF 的高结晶薄膜。
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