Vibrational relaxation of CH3F in inert gas matrices
- 15 June 1982
- journal article
- research article
- Published by AIP Publishing in The Journal of Chemical Physics
- Vol. 76 (12) , 5869-5877
- https://doi.org/10.1063/1.442940
Abstract
The deactivation mechanism of the CH stretching fundamentals and bending overtones in matrix isolated CH3F has been determined for dilute samples as a function of host and temperature using infrared laser excited vibrational fluorescence. The decay mechanism is the same for all hosts; depopulation of any of the levels near 3000 cm−1 occurs via rapid (V→V transfer to the CF stretching overtone level 2 ν3. Subsequent stepwise relaxation occurs from 2ν3 to ν3 and from ν3 to ground. Decay rates of 2ν3 and ν3 have been determined through temporal resolution of 1050 and 2100 cm−1 fluorescence, respectively. These rates show a dramatic dependence on host lattice, an increase of two orders of magnitude in going from Xe to Ar matrices. Lifetimes depend only weakly on temperature.Keywords
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