Dimethyl-diacetylene radical cation and its fluorescence spectra in rare gas matrices

Abstract

Matrix spectra of the C₆H₆⁺ species in solid Ne exhibit a well resolved vibrational structure, which shows a remarkably good agreement with the gas phase fluorescence. The ions in solid Ar are more strongly perturbed and show an interesting line shape asymmetry between the emission and excitation spectra. These are discussed in terms of the ion–host interaction potentials.