A highly selective colorimetric and "off-on-off" fluorescent probe for fluoride ions.
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(-).
Li
Yamin
Y
Department of Chemistry, School of Science, Beijing Institute of Technology, Beijing 100081, P. R. China.
Zhang
Xiaoling
X
Zhu
Baocun
B
Yan
Jilin
J
Xu
Weiping
W
D003124:Colorimetry; D005453:Fluorescence; D005456:Fluorescent Dyes; D005459:Fluorides / Q000032:analysis*; D062385:Hydroxybenzoates; D000644:Quaternary Ammonium Compounds; D013053:Spectrophotometry; D014466:Ultraviolet Rays
D005456:Fluorescent Dyes; D062385:Hydroxybenzoates; D000644:Quaternary Ammonium Compounds; C009405:tetrabutylammonium; C017616:phenolic acid; D005459:Fluorides