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Simple and Efficient Hydrogen Bond-Assisted Unit Exchange for Constructing Highly Soluble Covalent Organic Frameworks
ACS Macro Letters ( IF 5.1 ) Pub Date : 2023-08-28 , DOI: 10.1021/acsmacrolett.3c00438 Yingdi Zou 1 , Yue Qi 1 , Xiaofeng Li 1 , Honghan Long 1 , Zhimin Jia 1 , Ningning He 1 , Jie Zhang 1 , Ning Liu 2 , Yang Li 1 , Lijian Ma 1
ACS Macro Letters ( IF 5.1 ) Pub Date : 2023-08-28 , DOI: 10.1021/acsmacrolett.3c00438 Yingdi Zou 1 , Yue Qi 1 , Xiaofeng Li 1 , Honghan Long 1 , Zhimin Jia 1 , Ningning He 1 , Jie Zhang 1 , Ning Liu 2 , Yang Li 1 , Lijian Ma 1
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The majority of COFs synthesized using current methods exist as insoluble powders, which is unfavorable for processing and molding and greatly limits their practical applications. The syntheses of solution-processable or soluble COFs are challenging but hold immense promise and potential. Herein, for the first time, we have developed a simple and high-efficiency solvothermal-treated unit exchange approach to convert insoluble COF powders into smaller, highly soluble COFs via a hydrogen bond-assisted strategy. Due to the enhanced backbone-solvent hydrogen-bonding interactions between COFs and protic solvents and the effect of grain size reduction, the COFs after unit exchange can be easily dissolved in various protic solvents while remaining as insoluble powders in nonprotic solvents. The obtained soluble COFs exhibit remarkable fluorescence quenching upon detection of iodine in aqueous solution, with a detection limit as low as 75 nM, and can be fabricated into membranes for the efficient treatment of iodine-contaminated solutions.
中文翻译：
简单高效的氢键辅助单元交换构建高溶解性共价有机框架
目前方法合成的COF大多以不溶性粉末形式存在，不利于加工成型，极大限制了其实际应用。可溶液加工或可溶性 COF 的合成具有挑战性，但具有巨大的前景和潜力。在此，我们首次开发了一种简单高效的溶剂热处理单元交换方法，通过氢键辅助策略将不溶性COF粉末转化为更小、高度可溶的COF。由于COF与质子溶剂之间增强的骨架-溶剂氢键相互作用以及晶粒尺寸减小的作用，单元交换后的COF可以很容易地溶解在各种质子溶剂中，同时在非质子溶剂中保持为不溶性粉末。所获得的可溶性COF在检测水溶液中的碘时表现出显着的荧光猝灭，检测限低至75 nM，并且可以制成膜用于有效处理碘污染的溶液。
更新日期：2023-08-28
中文翻译：
简单高效的氢键辅助单元交换构建高溶解性共价有机框架
目前方法合成的COF大多以不溶性粉末形式存在，不利于加工成型，极大限制了其实际应用。可溶液加工或可溶性 COF 的合成具有挑战性，但具有巨大的前景和潜力。在此，我们首次开发了一种简单高效的溶剂热处理单元交换方法，通过氢键辅助策略将不溶性COF粉末转化为更小、高度可溶的COF。由于COF与质子溶剂之间增强的骨架-溶剂氢键相互作用以及晶粒尺寸减小的作用，单元交换后的COF可以很容易地溶解在各种质子溶剂中，同时在非质子溶剂中保持为不溶性粉末。所获得的可溶性COF在检测水溶液中的碘时表现出显着的荧光猝灭，检测限低至75 nM，并且可以制成膜用于有效处理碘污染的溶液。
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