Abstract

In this study, we report a novel ratiometric fluorescent probe with a blue shift of 180 nm based on a D-π-A-A structure. The probe composed of a hydroxyl moiety as a donor, a naphthyl ring as a π bridge, and benzothiazole/hemicyanine as an acceptor has good selectivity and high sensitivity to bisulfite (HSO3-) in aqueous solution. Besides one-photon fluorescence properties, the probe possesses excellent two-photon fluorescence properties and is successfully utilized for fluorescence imaging of HSO3- in MCF-7 cells and rat liver tissues. More importantly, the probe also has practical application potential for measuring the HSO3- content of real food samples.

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