Fig. 2. (a) UV-vis (solid line) and fluorescence (broken line) spectra of CP3 (in red) along with those of 4,5-dipropoxypyrene (P1) (in black) in CH₂Cl₂, [CP3] = 1.5 × 10^–5 M. Fluorescence spectra were recorded for excitation (λ_ex = 346 nm for P1, λ_ex = 395 nm for CP3) with the absorbance adjusted to 0.1.