Intermolecular electronic and vibrational energy transfer from the single vibronic levels of p-difluorobenzene (1B2u) to cyclobutanone

Abstract

An attempt has been made to measure the singlet–singlet electronic energy transfer rates from 17 single vibronic levels (SVL) of p-C6H4F2(1B2u) to cyclobutanone. No variation in the energy transfer cross sections have been found for the 17 SVL transitions, and an average value of 103 Å2 (πσc2) is obtained. This value is nearly identical to the value obtained for the vibrationally relaxed, thermal levels. The reason for the lack of variation is suggested to be the consequence of rapid, intramolecular vibrational energy redistribution induced by collisional perturbation.