Emission spectra for different G₀/n(H) ratios at G₀= 10³. The results for coronene derivatives are shown in black, while the spectra for C₅₄H₁₈ and C₉₆H₂₄ derivatives are shown in blue and red, respectively. The spectra have been conveniently normalized for a better comparison between consecutive G₀/n(H) ratios. Given the unavailability of the intrinsic spectra for some of these molecules, the spectra at low G₀/n(H) ratios are not complete due to the increasing abundance of highly superhydrogenated anionic species.