Journal
SENSORS AND ACTUATORS B-CHEMICAL
Volume 262, Issue -, Pages 188-194Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2018.01.186
Keywords
Fluorescence; Probe; Fluoride ions; Living cells; Zebrafish
Funding
- National Natural Science Foundation of China [21775005, 21405057, 21207047]
- Science and Technology Developing Foundation of Jilin Province of China [20180201050YY, 201701011106JC, 20160623025TC, 20160204010GX]
- Open Funds of the State Key Laboratory of Electroanalytical Chemistry [SKLEAC201704]
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A novel fluorescent probe (Flu-Si) based on fluorescein and coumarin fluorophores for highly selective and sensitive detection of F- was successfully developed. It was shown that the mechanism of recognition involves a desilylation reaction that takes place after addition of F- anions. A linear relationship between the ratio of emission intensities at 532 and 465 nm (I-532/I-465) and F- concentration over the range of 0-20 mu mol L-1 with a LOD of 0.025 mu mol L-1 was found. The sensing mechanism of Flu-Si with F- was confirmed by density functional theory (DFT) and time dependent density functional theory (TDDFT) calculation. Moreover, it was demonstrated that Flu-Si is an efficient fluorescent probe for F- anions in living cells and zebrafish, indicating its sensing potential in clinical diagnosis. (C) 2018 Elsevier B.V. All rights reserved.
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