Vibrational relaxation of CH/sub 3/F in inert gas matrices
The deactivation mechanism of the CH stretching fundamentals and bending overtones in matrix isolated CH/sub 3/F 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/sup -1/ occurs via rapid (<5 ns) V..-->..V transfer to the CF stretching overtone level 2 ..nu../sub 3/. Subsequent stepwise relaxation occurs from 2..nu../sub 3/ to ..nu../sub 3/ and from ..nu../sub 3/ to ground. Decay rates of 2..nu../sub 3/ and ..nu../sub 3/ have been determined through temporal resolution of 1050 and 2100 cm/sup -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.
- Research Organization:
- Department of Chemistry, University of California, and Materials and Molecular Research Division of the Lawrence Berkeley Laboratory, Berkeley, California 94720
- OSTI ID:
- 5261679
- Journal Information:
- J. Chem. Phys.; (United States), Journal Name: J. Chem. Phys.; (United States) Vol. 76:12; ISSN JCPSA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
400301* -- Organic Chemistry-- Chemical & Physicochemical Properties-- (-1987)
ARGON
ELECTROMAGNETIC RADIATION
ELEMENTS
ENERGY LEVELS
EXCITED STATES
FLUIDS
FLUORESCENCE
FLUORINATED ALIPHATIC HYDROCARBONS
GASES
HALOGENATED ALIPHATIC HYDROCARBONS
HARMONICS
INFRARED RADIATION
LASER RADIATION
LIFETIME
LUMINESCENCE
MATRIX ISOLATION
NONMETALS
ORGANIC COMPOUNDS
ORGANIC FLUORINE COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
OSCILLATIONS
RADIATIONS
RARE GASES
RELAXATION
RESOLUTION
TEMPERATURE DEPENDENCE
VIBRATIONAL STATES
XENON