Carbon-13 isotopic selectivity in the infrared multiphoton photolysis of CF2Cl2–O2 mixtures
- 15 September 1981
- journal article
- Published by Canadian Science Publishing in Canadian Journal of Chemistry
- Vol. 59 (18) , 2703-2707
- https://doi.org/10.1139/v81-389
Abstract
The infrared multiphoton chemistry of CF2Cl2–O2 mixtures has been studied at laser frequencies where the product CF2O is highly enriched in carbon-13. Yield enhancements with no loss of isotopic selectivity are attributed to suppression of radical–atom recombination reactions. It is demonstrated that addition of up to 60 Torr of either excess O2 or N2 suppresses a thermal, non-selective channel important at higher fluences. A selectivity factor greater than 30 is observed for 4 Torr CF2Cl2 in the presence of 80 Torr of oxygen.Keywords
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