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We report the resonant two-photon ionization and mass-analyzed threshold ionization spectra of 3,4-difluoroanisole.The vibronic features of 3,4-difluoroanisole are built on 35 505 ± 2 and 35 711 ± 2 cm-1 corresponding to the origins of the S1←S0 electronic transition (E1) of the cis and trans rotamers.