Journal
ANALYST
Volume 139, Issue 14, Pages 3588-3592Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c4an00522h
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Funding
- Nebraska EPSCoR
- URF in the University of Nebraska at Kearney
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A N-aryl-1,8-naphthalimide based sensor (ES-1) bearing a trimethylsilyl ether has been synthesized by a two-step reaction for quantitative detection of fluoride (F-). ES-1 exhibited monomer/excimer emissions at 410 and 524 nm respectively in CH2Cl2. In the presence of F-, the desilylation of trimethylsilyl ether caused decay of the excimer emission as well as enhancement of the monomer emission to give a ratiometric signal. The fluoride-triggered desilylation showed a high reaction rate and high affinity to F- over nine other interfering anions. ES-1 provided a novel fluorescence assay based on excimer-monomer switch of N-aryl-1,8-naphthalimide to quantitatively measure F- with a detection limit of 0.133 ppm.
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