Spectroscopic manifestation of intramolecular relaxation of azulene in supersonic jets

This is the authors' abstract. We don't add key points for this paper.

In this paper we report on the line profiles in the absorption spectra for the S0 → S1 electronic origin and for the 659 and 1394 cm−1 vibrational excitations in the S1 manifold of azulene in pulsed, planar, supersonic expansions. The S1 electronic origin exhibits a Lorentzian line shape, whose homogeneous linewidth results in the lifetime τ=0.8±0.2 ps for interstate electronic relaxation in the isolated molecule.