VUV photofragmentation map of (a) Pyr⁺ and (b) Cor⁺. Each arrow represents a specific fragment loss or an involved mechanism triggered by a VUV photon absorption (a legend is provided for each map). The fragmentation rates k_frag (here k for simplification) are displayed in units of 10⁻³ s⁻¹. When needed, the branching ratios are also displayed. The optimized molecular structures are depicted for the parent cations and the key fragments, as well as their expected isomers. Bold boxes correspond to the major ion channels (yield higher than 10% during the kinetics). The case of Cor⁺ is peculiar since the fitting requires the contribution of a population of isomers (red box). Two plausible scenarios connecting the parent to the isomers are shown.