Fig. 2. (A) UV-vis spectra of pyrene at different concentration of pyrene, (B) UV-vis spectra of pyrene in 5 wt% ChCl–Gly, ChCl–urea aqueous solution. (C) The plot of absorption intensity vs. concentration of [Bmim][OS] in the presence 5wt% ChCl–Gly aqueous solution at the fixed wavelength and (D) the plot of absorption intensity vs. concentration of [Bmim][OS] in the presence 5 wt% ChCl–urea aqueous solution at the fixed wavelength (200–600 nm).
