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

1984; American Institute of Physics; Volume: 81; Issue: 10 Linguagem: Inglês

10.1063/1.447422

1520-9032

Steven R. Goates, J. O. Chu, G. W. Flynn,

Molecular Junctions and Nanostructures

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.