Singlet And Triplet n,π∗ Transitions of Jet-Cooled p-Benzoquinone

Abstract

The fluorescence/phosphorescence excitation spectra, the dispersed fluorescence/phosphorescence spectra and the sensitized phosphorescence excitation spectrum have been measured for jet-cooled p-benzoquinone. The assignments of vibronic bands in the 1B1g(n-,π∗) ← 1Ag and 1Au(n+,π∗) ← 1Ag transitions have been definitely established. The phosphorescence spectra from vibronic levels of 3Au exhibit a feature of single vibronic level emission. The 3Au ← 1Ag transition was also vibrationally analyzed.