Observation of high vibrational excitation in HCN molecules produced from 193 nm photolysis of 1,3,5-triazine

Infrared emission from the ν2 bending mode and ν3 C–H stretching mode of HCN have been observed following 193 nm pulsed excimer laser photolysis of 1,3,5-triazine. Using a simple harmonic oscillator analysis, the number of ν2 bending quanta produced in HCN from photolysis of sym-triazine was found t...

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Veröffentlicht in:J. Chem. Phys.; (United States) 1984-11, Vol.81 (10), p.4521-4525
Hauptverfasser: GOATES, S. R, CHU, J. O, FLYNN, G. W
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Sprache:eng
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Zusammenfassung:Infrared emission from the ν2 bending mode and ν3 C–H stretching mode of HCN have been observed following 193 nm pulsed excimer laser photolysis of 1,3,5-triazine. Using a simple harmonic oscillator analysis, the number of ν2 bending quanta produced in HCN from photolysis of sym-triazine was found to be 70 times larger than the number of ν3 C–H stretching quanta. The combination of a high density of bending vibrational states in HCN and favorable geometry changes which occur in going from 1,3,5-triazine to three HCN molecules, appear to give an unusually pure distribution which maximizes vibrational energy in the HCN bending mode.
ISSN:0021-9606
1089-7690
DOI:10.1063/1.447422