Benzothiazole derived ratiometric fluorescent probe for selective detection of Pd(0) based on Tsuji-Trost reaction.

• A new reaction-based ratiometric fluorescent probe BTP-Pd for Pd(0) was developed. • The structure of the BTP-Pd was confirmed by NMR, HRMS and X-ray diffraction analysis. • The BTP-Pd displays rapid fluorescence response and low saturation concentration toward Pd(0). A novel ratiometric fluorescent probe (emission shift 112 nm) BTP-Pd based on benzothiazole derivatives has been developed for the detection of Pd(0). The structure of the probe BTP-Pd was characterized by 1H/13C NMR spectra, high-resolution mass spectra (HRMS) and X-ray crystallography. The probe BTP-Pd displays rapid fluorescence response (about 10 min) and low saturation concentration (about 4 μM) toward Pd(0). Moreover, the probe BTP-Pd can be used to discriminate Pd(0) and Pd2+. Therefore, it would provide an approach for detecting not only Pd(0), but also Pd2+ through reductant reduction in environment system. [ABSTRACT FROM AUTHOR]