Single vibronic level fluorescence spectroscopy and lifetime measurements were used to study intramolecular vibrational energy transfer in low pressure gas samples of1B2aniline, induced by collisions with H2O and CH3F. Overall rates of depopulation of the initially prepared levels, as well as rate constants for specific modehyphen;tohyphen;mode transfers, have been measured for the initially excited levels 00, 10b1, andI1. The observed rates and patterns of energy transfer show both a high collisional efficiency for these polyatomic colliders and modehyphen;tohyphen;mode specificity; they also indicate that hydrogen bonding interactions are unimportant.
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