Fig. 2: AIE features of BISX, ISX, MISX and MTSX.

a–d PL spectra of BISX, ISX, MISX and MTSX in THF/water mixtures with different water fractions (fw). Concentration (c) = 1 × 10–5 M, excitation wavelength (λex) = 365 nm. e–h Plots of relative PL intensity αAIE(I/I0) versus fw, where I0 was the maximal PL intensity in THF solution. Inset: fluorescence images of BISX, ISX, MISX and MTSX in THF/water mixtures with fw = 0% and 99%, respectively.