Journal
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
Volume 252, Issue -, Pages -Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.saa.2021.119518
Keywords
Fluoride ions; Ultrafast determination; Near-infrared fluorescent probe
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Funding
- NSF of China [21705104]
- Scientific and Technological Innovation Programs of Higher Education Institutions in Shanxi [2019L0406]
- Youth Science Foundation of Shanxi Province [201901D211338]
- Science Foundation of Shanxi Province [201901D111191]
- Youth Top Talent Plans of Shanxi Province
- Startup Foundation for Doctors of Shanxi Medical University [03201601]
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The study introduces a ultrafast fluorescence probe with response time in seconds for detecting fluoride ions, which is directly proportional to the F- concentration in the real samples and offers a rapid detection of F-.
The first ultrafast fluorescence probe with response time in seconds (10 s) for fluoride ions (F-) has been proposed by conjugating dimethylthiophosphoryl group as a recognition unit with the near-infrared fluorophore of hemicyanine. The response mechanism is the F--induced cleavage of the dimethylthiophosphoryl group, along with the liberation of the fluorophore, which results in a distinctly enhanced fluorescence intensity at 730 nm (lambda(ex) = 680 nm). The fluorescence enhancement of the probe is directly proportional to the F- concentration in the range of 10-300 mu M with the detection limit of 4.28 mu M. The probe has been successfully used to determine F- concentration in real water and toothpaste samples as well as image F- in living cells. The simplicity and quick response of this probe endow it with the ability of detecting F- rapidly in real samples. (C) 2021 Elsevier B.V. All rights reserved.
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