Abstract − Analytical Sciences, 26(10), 1077 (2010).
A Highly Selective Colorimetric and “Off-on-off” Fluorescent Probe for Fluoride Ions
Yamin LI,* Xiaoling ZHANG,* Baocun ZHU,* Jilin YAN,** and Weiping XU***
*Department of Chemistry, School of Science, Beijing Institute of Technology, Beijing 100081, P. R. China
**Department of Chemistry, Suzhou University, Suzhou 215123, P. R. China
***Enviromental Monitoring Station of Shaanxi Yulin City, Yulin 719000, P. R. China
**Department of Chemistry, Suzhou University, Suzhou 215123, P. R. China
***Enviromental Monitoring Station of Shaanxi Yulin City, Yulin 719000, P. R. China
In this paper, a highly selective and sensitive probe for fluoride ions (F−), containing a phenylpyridylvinylene derivative reporter and a Si–O bond receptor, was designed and characterized. The reaction mechanism is based on the intramolecular charge transfer (ICT) mechanism. Upon addition of F−, probe 1 showed a remarkable red-shift (183 nm) in the absorption spectra accompanying with the color changes from colorless to purple, so probe 1 could serve as a “naked-eye” probe for F−. The absorbance of probe 1 at 545 nm increased linearly with the concentration of F− from 20 to 150 μM. The detection limit was calculated to be 0.1 μM. Besides, “off-on-off” fluorescence intensity changes were also observed in the fluorescence spectra. The present results may provide a useful approach for the development of highly selective dual-channel probes for F−.
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