Laser induced fluorescence and/or absorption spectra of the cations of 2,3,5,6‐tetrafluorophenol, 2,3,5,6‐tetrafluorothiophenol, and 3,5‐difluorophenol have been obtained in a Ne matrix. The spectra of C6HF4OH+ are much better resolved than in the gas phase. The gas phase congestion is likely caused by the near degeneracy of the and electronic states whose separation is now measured at 207 cm−1. The spectrum of C6H3F2OH+ represents a deperturbed example of the Jahn–Teller distorted sym‐C6F3H3+ ion. C6H3F2SH+ shows only a broad featureless absorption.
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Laser induced fluorescence spectra of fluorophenol cations in a Ne matrix