Continuous detection of HCl and NH3 gases with a high-performance fluorescent polymer sensor. (16th July 2018)

• Record Type: Journal Article
• Authors: Xu, Ning; Wang, Rui-Lei; Li, Dong-Peng; Zhou, Zi-Yan; Zhang, Tian; Xie, Yu-Zhong; Su, Zhong-Min
• Is Part Of: New journal of chemistry. Volume 42:Number 16(2018)
• Page Start: 13367
• Page End: 13374
• Publication Date: 2018-07-16
• Subjects: Chemistry -- Periodicals; Chimie -- Périodiques; 540
• DOI: 10.1039/c8nj02344a
• Languages: English
• ISSNs: 1144-0546

Abstract

Abstract : A novel fluorescent triazine-based covalent organic polymer (COP-1) sensor for HCl and NH3 gases has been designed and synthesized. 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.