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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

Authors

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Professor Carl Redshaw C.Redshaw@hull.ac.uk
Professor of Inorganic Materials Chemistry and REF Lead for Chemistry

Jun Li

Lan Mu

Gang Wei

Xi Zeng

Yuan-Hui Zhao

Abstract

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.

Journal Article Type Article
Publication Date Dec 1, 2014
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
Institution Citation 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. https://doi.org/10.1016/j.snb.2014.07.048
DOI https://doi.org/10.1016/j.snb.2014.07.048
Keywords Quinaldine; Fluorescent/colorimetric sensor; Al³⁺; F⁻
Publisher URL http://www.sciencedirect.com/science/article/pii/S0925400514008764
Copyright Statement © 2014, Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/
Additional Information Author's accepted manuscript of article published in: Sensors and actuators B : chemical, 2014, v.204, December.

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Copyright Statement
© 2014, Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/




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