Coriolis effects on “intermediate case” of intramolecular vibrational relaxation: Rotational-temperature dependence of energy- resolved fluorescence from jet-cooled perylene with 776–975 cm−1 excess energies

The rotational-temperature dependence of the energy-resolved fluorescence, combined with the calculated level density, indicates that the large variations in the rate of the intramolecular vibrational relaxation over a small excess energy in S₁ perylene is due to the fluctuations in the density of accessible vibrational levels, resulting from the vibrational selection rules for second-order Coriolis coupling.