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

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.

Citation

Redshaw, C., Li, J., Mu, L., Wei, G., Zeng, X., & Zhao, Y.-H. (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

• 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
• Publisher: Elsevier
• Peer Reviewed: Peer Reviewed
• Volume: 204
• Issue: December
• Pages: 450-458
• DOI: https://doi.org/10.1016/j.snb.2014.07.048
• Keywords: Quinaldine; Fluorescent/colorimetric sensor; Al³⁺; F⁻
• Public URL: https://hull-repository.worktribe.com/output/375301
• Publisher URL: http://www.sciencedirect.com/science/article/pii/S0925400514008764
• Additional Information: Author's accepted manuscript of article published in: Sensors and actuators B : chemical, 2014, v.204, December.
• Contract Date: Jun 16, 2015