College of Chemical Engineering and Materials Science, Tianjin University of Science and Technology, Tianjin, 300457, China.
College of Chemical Engineering and Materials Science, Tianjin University of Science and Technology, Tianjin, 300457, China.
Anal Chim Acta. 2020 May 1;1109:114-121. doi: 10.1016/j.aca.2020.03.003. Epub 2020 Mar 6.
A highly crystalline covalent organic frameworks (COFs) formed by condensation reaction between 1, 3, 5-tris (4-aminophenyl) benzene and 4, 4'-biphenyldicarboxaldehyde is utilized as a sensing platform for water in organic solvent over a broad concentration range. The resulting COFs exhibits brilliant fluorescence in various organic solvents such as methanol, DMF, acetonitrile and ethanol, moreover its fluorescence intensity has a significant and rapid response to the content of water in organic solvent over a broad concentration range. The broadest sensing range is achieved over 7%-70% (v/v) for water in DMF, and the lowest limit of detection is 0.042% (v/v) for water in methanol among the investigated organic solvents. The superior properties of the sensing platform expand the application ranges of COFs and endow the resulting COFs with a great prospect in practical applications for highly efficient detecting water in organic solvent.
一种由 1,3,5-三(4-氨基苯基)苯和 4,4'-联苯二甲醛缩合反应形成的高结晶共价有机骨架 (COFs)被用作在宽浓度范围内检测有机溶剂中水分的传感平台。所得 COFs 在各种有机溶剂（如甲醇、DMF、乙腈和乙醇）中表现出出色的荧光，此外，其荧光强度对有机溶剂中水分的含量具有显著且快速的响应，在宽浓度范围内。在 DMF 中，水的检测范围最宽可达 7%-70%（v/v），而在甲醇中，水的检测下限最低可达 0.042%（v/v）。该传感平台的优异性能扩展了 COFs 的应用范围，使所得 COFs 在有机溶剂中高效检测水的实际应用中具有广阔的前景。
