A BODIPY-Based Water-Soluble Fluorescent Probe for Naked Eye Detection of pH

In this study, a BODIPY-based water-soluble fluorescent chemosensor BBP has been synthesized using BODIPY as the fluorescence group and quinoline as the recognition group. BBP can be used for naked eye detection of pH in complete aqueous solution and it shows high specificity in a wide range of cations. The p Ka value is determined to be 2.94 and the fluorescence intensity is linearly related to pH in the range of 2.4–3.6.