Fig. 5 |. Reactions and data relevant to the discussion of photophysics of the systems described in this Review.

a, Aggregation and disaggregation before and after binding with diols. b, Fluorescence spectra of a saturated solution of 1 in 2:1 water/methanol with 50 mM NaCl. Emission scan with λ_ex = 368 nm (blue). Excitation scan with λ_em = 417 nm (red). Excitation scan with λ_em = 520 nm (green). Emission scan with λ_ex = 408 nm (purple). Adapted from ref. ⁶⁶, American Chemical Society (b).