Fig. 2. (a) Normalized fluorescence spectra for DL1, DZ1 in acetonitrile (c = 10 μM); (b) fluorescence spectra of DZ1 (10 μM) in ethyl acetate/acetonitrile mixtures with different ethyl acetate fractions (λex = 480 nm; λem = 568 nm); (c) plot of emission intensity vs. ethyl acetate fraction, inset: photographs of the luminescence of DZ1 in ethyl acetate fractions (0–98%) under UV illumination at 365 nm.
