A reversible and visible colorimetric/fluorescent chemosensor for Al3+ and F- ions with a Large Stoke%26apos;s shift

作者：Zhao Yuan Hui; Zeng Xi; Mu Lan^*; Li Jun; Redshaw Carl; Wei Gang

来源：Sensors and Actuators B: Chemical , 2014, 204: 450-458.

DOI：10.1016/j.snb.2014.07.048

• Quinaldine
• Fluorescent/colorimetric sensor
• Al3+
• F-

A quinoline-vinyl-dihydroxylphenyl linkage comprising a donor-Tr-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 %26quot;off-on%26quot; optical switching mode has been constructed by sequential inputs from Al3+ and F- ions to the sensor 2 via different excitation and emission wavelengths. H-1 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.

• 出版日期2014-12-1
• 单位贵州大学; CSIRO