Journal
ANALYTICA CHIMICA ACTA
Volume 1109, Issue -, Pages 114-121Publisher
ELSEVIER
DOI: 10.1016/j.aca.2020.03.003
Keywords
Covalent organic frameworks; Sensing platforms; Sensing water; Fluorescence sensor
Categories
Funding
- Ministry of Science and Technology of China [2016YFD0401101]
- National Natural Science Foundation of China [21375094]
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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. (C) 2020 Elsevier B.V. All rights reserved.
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