Laser Induced Energy Transfer Studies in Polyatomic Mixtures: CH3F-NO2 |
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| Authors: | S M Lee A M Ronn |
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| Institution: | Chemistry Department , Brooklyn College of the City University of New York , Brooklyn, New York, 11210 |
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| Abstract: | Abstract The internal kinetics of NO2 as well as the kinetics of crossover between CH3F and NO3 were studied in mixtures of these polyatomics and rare gases. Subsequent to excitation of the CH3F to v 3=1 by the P(20) line of a 9.6μ Q-switch CO2 laser, fluorescence of NO2 at 6.12μ from v 3=1 was monitored. The equilibration rate of the stretching modes in NO2 was determined to be 46 ± 10 msec?1 torr?1 while the rate of stretches-bend equilibration was measured as 15 ± 3 msec?1 torr?1. The rate of crossover from excited CH3F to NO2 in high rare gas dilution was measured as 90 ± 20 msec?1 torr?1 and the reverse rate as 285 ± 60 msec?1 torr?1. Comparison to other triatomic systems as well as other experiments with mixtures of polyatomics are made and implications of laser “photochemistry” of NO2 reactions are discussed. |
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