Journal
ACS OMEGA
Volume 5, Issue 34, Pages 21684-21688Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsomega.0c02589
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Funding
- National Natural Science Foundation of China [21907026]
- Natural Science Foundation of Hunan Provincial [20171.12195]
- Scientific Research Fund of Hunan Provincial Education Department [18B369]
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Developing an effective method for monitoring fluoride ion in biological samples is meaningful because fluoride ion plays a vital role in biological processes. In this contribution, a simple water-soluble ESIPT fluorescent probe 2-((4-((tert-butyldiphenylsilypoxy)-1,3-dioxoisoindolin-2-yl)methyl)-1-ethyl-pyridin-1-ium iodide (SPI) was constructed for monitoring fluoride ion. The probe SPI containing pyridinium salt group exhibited preeminent water solubility. The probe SPI introducing a trimethyldiphenylsilyl ether recognition group displayed excellent selectivity for fluoride ion over other biologically relevant species. Additionally, the probe SPI exhibited a fast response for a fluoride ion, suggesting that it could provide real-time fluoride ion detection. Importantly, the probe could detect fluoride ion with a linear range of 0-70.0 x 10(-)(6) M and a low detection limit of 1.16 x 10(-6) M. Furthermore, probe SPI could detect fluoride ion with a large Stokes shift (98 nm), which was attributed to ESIPT fluorescence sensing process. At last, probe SPI was successfully employed to monitor fluoride ion in living cells.
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