Vibrational relaxation of HCN(001) by the noble gases, O2, N2 and CO
- 1 January 1981
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Journal of the Chemical Society, Faraday Transactions 2: Molecular and Chemical Physics
- Vol. 77 (6) , 861-871
- https://doi.org/10.1039/f29817700861
Abstract
The tuned output from an optical parameteric oscillator has been used to excite HCN to its (0001) level for measurements of vibrational energy transfer. By observing time-resolved infrared fluorescence from the (0001) level in the presence of different collision partners, the following rate constants (k/cm3 molecule–1 s–1) were obtained at 297 ± 4 K: kHe=(6.4 ± 0.4)×10–15; kNe=(6.3 ± 0.6)×10–15; kAr=(6.5 ± 0.5)×10–15; kKr=(7.1 ± 0.7)×10–15; kO2 =(1.34 ± 0.05)×10–14; kN2 =(2.2 ± 0.2)×10–14; kCO=(3.3 ± 0.2)×10–14. It is argued that, in all cases, relaxation from the (0001) level is rate-determining and that the dominant process is probably transfer into neighbouring levels, such as (1200), associated with the ν1 and ν2 modes.Keywords
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