Fig. 2. (a) Sensing mechanism of the BIDQIQU core unit and fluorescence response of BODIQU-tBuCZ solution to DCP, with the solution colour changing from green to orange. (b) UV-vis absorption spectra and (c) fluorescence emission spectra of BODIQU-tBuCZ titrated with DCP in DCM. (d) Lifetime spectra of BODIQU-tBuCZ before and after DCP treatment. (e) 1H NMR spectra of the compound BODIQU-tBuCZ with different equivalence ratios of DCP addition. (f) FT-IR spectra of BODIQU-tBuCZ before and after DCP treatment.
