“…Considering the UV spectra, when Compound 3 was excited at 355 nm, emission of 3 was determined with a large Stokes' shift (191 nm) at 546 nm in the fluorescence spectrum (see Figure 1A). Molecules bearing 2-(2 0 -Hydroxyphenyl) benzothiazole (HBT), 2-(2 0 -Hydroxyphenyl) benzoxazole (HBO), 2-(2 0 -Hydroxyphenyl) benzimidazole or 2-(2 0 -Aminophenyl) benzimidazole (APBI) moiety exhibit ESIPT [31][32][33], AIE [34], ICT [35], and PCET [36] process, and they have been applied to detect various analytes. At first, we explored different solvent effect on the absorption and fluorescence feature of Compound 3 to evaluate AIE phenomena.…”