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Issue 16, 2018
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Continuous detection of HCl and NH3 gases with a high-performance fluorescent polymer sensor

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Abstract

A novel fluorescent triazine-based covalent organic polymer (COP-1) sensor for HCl and NH3 gases has been designed and synthesized. Both the COP-1 powders that were dispersed in solvents and the COP-1 film that was formed on the surface of quartz sheets exhibited stable fluorescence and a sensitive HCl/NH3 response. Immersion in HCl-bubbled solvents weakens and red-shifts the fluorescence emission of the COP-1 powders, owing to a protonation-induced charge transfer (CT). Subsequent injection of NH3 into the solvents recovers the fluorescence via deprotonation. Interestingly, the microporous COP-1 film also shows a similar fluorescence response to HCl/NH3 gas, with high sensitivity and good reversibility, which suggests that it could serve as a solid-state optical probe for continuous and quantitative detection of HCl and NH3 gases. The formation of the red-shifting hydrogen bonds is found to be the origin of the response.

Graphical abstract: Continuous detection of HCl and NH3 gases with a high-performance fluorescent polymer sensor

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Supplementary files

Article information


Submitted
12 May 2018
Accepted
25 Jun 2018
First published
29 Jun 2018

New J. Chem., 2018,42, 13367-13374
Article type
Paper

Continuous detection of HCl and NH3 gases with a high-performance fluorescent polymer sensor

N. Xu, R. Wang, D. Li, Z. Zhou, T. Zhang, Y. Xie and Z. Su, New J. Chem., 2018, 42, 13367
DOI: 10.1039/C8NJ02344A

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