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A reversible and visible colorimetric/fluorescent chemosensor for Al³⁺+ and F⁻ ions with a Large Stoke's shift

Redshaw, Carl; Li, Jun; Mu, Lan; Wei, Gang; Zeng, Xi; Zhao, Yuan-Hui


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Professor Carl Redshaw
Professor of Inorganic Materials Chemistry and REF Lead for Chemistry

Jun Li

Lan Mu

Gang Wei

Xi Zeng

Yuan-Hui Zhao


A quinoline-vinyl-dihydroxylphenyl linkage comprising a donor-π-bridge-acceptor structural motif, in which the quinoline serves as an electron-withdrawing core, has been synthesized and used as a fluorescent sensor (2) for the recognition of Al³⁺+ and F⁻ by colorimetry/fluorescence. The sensor 2 exhibited little fluorescence due to excited-state intramolecular proton transfer from the hydroxyl oxygens to the nitrogen of the quinoline moiety. By contrast, on coordination of Al³⁺+ or F⁻, sensor 2 afforded strong fluorescence. A reversible “off–on” optical switching mode has been constructed by sequential inputs from Al³⁺+ and F⁻ ions to the sensor 2 via different excitation and emission wavelengths. ¹H NMR and IR spectroscopic analysis revealed that the Al³⁺+ is coordinated to the quinoline nitrogen and phenolic oxygen atoms, whereas the F⁻ center is only coordinated by two phenolic oxygen atoms.


Redshaw, C., Li, J., Mu, L., Wei, G., Zeng, X., & Zhao, Y. (2014). A reversible and visible colorimetric/fluorescent chemosensor for Al³⁺+ and F⁻ ions with a Large Stoke's shift. Sensors and actuators. B, Chemical, 204(December), 450-458.

Journal Article Type Article
Acceptance Date Jul 12, 2014
Online Publication Date Jul 21, 2014
Publication Date Dec 1, 2014
Deposit Date Jun 16, 2015
Publicly Available Date Jun 16, 2015
Journal Sensors and actuators B : chemical
Print ISSN 0925-4005
Electronic ISSN 0925-4005
Publisher Elsevier
Peer Reviewed Peer Reviewed
Volume 204
Issue December
Pages 450-458
Keywords Quinaldine; Fluorescent/colorimetric sensor; Al³⁺; F⁻
Public URL
Publisher URL
Additional Information Author's accepted manuscript of article published in: Sensors and actuators B : chemical, 2014, v.204, December.


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