1. A highly selective fluorescence turn-on sensor for Hg2+ based on quinolimide in aqueous media and its applications.
- Author
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Qu, Wenjing, Zhang, Yu, Cao, Hongjie, and Jia, Lihua
- Subjects
- *
CHEMORECEPTORS , *FLUORESCENCE , *DETECTORS , *SOIL sampling , *SOIL moisture , *WATER sampling - Abstract
[Display omitted] • A highly selective Hg2+ sensor QPE was developed based on quinolimide. • QPE had high sensitivity, low LOD and LOQ, wide pH range, and rapid response. • QPE -loaded test strips were fabricated for the visual detection of Hg2+. • QPE had been used for tracing Hg2+ in real water and soil samples and living cells. Herein, a novel fluorescent sensor QPE based on quinolimide was developed, which displayed the highly selective response to Hg2+ through the turn-on signal in aqueous media. The corresponding recognition mechanism of QPE for Hg2+ was investigated by the titration experiments, Job's plots, HRMS, and DFT calculations analysis. QPE could detect Hg2+ in a broad pH range (pH = 4–9) with the LOD of 20 nM and the LOQ of 66 nM. Meanwhile, QPE -loaded test strips were demonstrated in the visual detection of Hg2+. Importantly, QPE exhibited the reliable capability to track Hg2+ in real water and soil samples and yeast cells, indicating that QPE could be used as a prospective tool for monitoring Hg2+ in wide fields. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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