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Xiaohong Cheng, Shuang Li, Guohua Xu, Conggang Li, Prof. Jingui Qin and Prof. Zhen Li A Reaction-Based Colorimetric Fluoride Probe: Rapid “Naked-Eye” Detection and Large Absorption Shift ChemPlusChem 77

Version of Record online: 17 JUL 2012 | DOI: 10.1002/cplu.201200106

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Seen with the naked eye: A new ratiometric colorimetric probe toward fluoride has been designed based on the fluoride-promoted cleavage of the Si[BOND]O bond by using intramolecular charge transfer as a signaling mechanism. Upon the addition of F, the probe changes color from colorless to deep blue and is visible with the naked eye. This change is accompanied by a dramatic shift of the maximum absorption wavelength (≈230 nm; see scheme).

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