A novel NIR fluorescent probe for the double-site and ratiometric detection of SO2 derivatives and its applications†
A feasible double-site near-infrared (NIR) fluorescent probe Q5 based on xanthenes was developed. Probe Q5 showed clearly HSO3− induced changes in the fluorescence ratio of two well-separated NIR and VIS peaks, showing excellent selectivity compared with other analytes. And the detection limit of the probe for HSO3− was found to be 89 nM. Furthermore, fluorescence imaging experiments of HSO3− in CEM cells revealed that the probe has potential application value in biological systems.
- This article is part of the themed collection: New Journal of Chemistry HOT Articles