Intramolecular vibrational energy transfer in 1B2 aniline induced by collisions with H2O and CH3F

Abstract

Single vibronic level fluorescence spectroscopy and lifetime measurements were used to study intramolecular vibrational energy transfer in low pressure gas samples of ¹B₂ aniline, induced by collisions with H₂O and CH₃F. Overall rates of depopulation of the initially prepared levels, as well as rate constants for specific mode‐to‐mode transfers, have been measured for the initially excited levels 0⁰, 10b¹, and I¹. The observed rates and patterns of energy transfer show both a high collisional efficiency for these polyatomic colliders and mode‐to‐mode specificity; they also indicate that hydrogen bonding interactions are unimportant.