Cation spectroscopy of 3,4-difluoroaniline by two-color resonant two-photon mass-analyzed threshold ionization

► We report the MATI spectra of 3,4-difluoroaniline cation. ► The adiabatic ionization energy is determined to be 64 195 ± 5 cm-1. ► The observed vibrations involve in-plane ring motions and amino inversion.