Abstract
Although some reports on sensing ClO− had been presented, the ClO− sensor with high selectivity and sensitivity in aqueous media was still expected. Herein, an effective fluorescent sensor for ClO− in aqueous media was designed and synthesized by simple procedure based on cyanostilbene derivative (TCS). TCS exhibited strong fluorescence in aqueous media, which could be selectively quenched by ClO− among various species. The detection limit was as low as 3.2 × 10−8 M. The sensing mechanism of the oxidation of sulfur in thiophene unit was confirmed by the FT-IR spectrum, fluorescence Job’s plot, 1H NMR spectrum and MS spectrum. This sensor was successfully applied on detecting ClO− in real sample and living-cell imaging, suggesting its potential application for sensing ClO− in both vitro assay and vivo environment.
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