The invention relates to synthesis and application of a
hypochlorous acid fluorescent probe based on
phenothiazine cinnamyl
aldehyde. The
structural formula of the probe is shown in the specification. The invention provides a preparation method for synthesizing the fluorescent probe by taking
phenothiazine (PTZ) and 4-(dimethylamino) cinnamyl
aldehyde as raw materials. The fluorescent probe has the characteristics of high sensitivity, quick response, low
cytotoxicity and the like, and is suitable for detecting
hypochlorous acid. Firstly, the fluorescent probe has weak
fluorescence at the position of 560 nm, after the fluorescent probe responds to
hypochlorous acid, the
fluorescence at the position of 560 nm is remarkably enhanced, and good
linear correlation is shown in the range of 1-35 [mu] M; in addition, the fluorescent probe has good selectivity on hypochlorous acid, and is not influenced by various kinds of cations, anions, biological mercaptan and
active oxygen; furthermore, the interaction between the fluorescent probe and hypochlorous acid is rapid, and the
response time is within 30s; finally, in cells, the fluorescent probe shows
low toxicity and can be used for detecting hypochlorous acid in living cells.