Journal
MOLECULAR PHYSICS
Volume 108, Issue 7-9, Pages 1097-1113Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/00268971003657110
Keywords
reaction dynamics; laser induced fluorescence; crossed molecular beam technique; radical beams; C-2 and CN radicals; reactions of CN with unsaturated hydrocarbons
Funding
- Italian MIUR (Ministero Istruzione Universita Ricerca) [2007-H9S8SW]
- European Union
- FSE (Fondo Sociale Europeo)-Regione Umbria - Ministero del Lavoro e delle Politiche Sociali
- French Agence Nationale de Recherche
- CRNS'
- [MCRTN-CT-2004-512302]
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Continuous supersonic beams of dicarbon (C-2) and cyano (CN) radicals have been generated by a high-pressure radio-frequency discharge beam source starting from dilute mixtures in rare gases of suitable precursor molecules. Their internal quantum state distributions have been characterized by laser-induced-fluorescence (LIF) in a new crossed molecular beam-laser apparatus. These supersonic beams have been used to study the reactive scattering of C-2 and CN radicals with unsaturated hydrocarbons. This paper reports here on the C-2 and CN radical beam characterization by LIF and on dynamics studies of the reactions CN+C2H2 (acetylene) and CN+CH3CCH (methylacetylene) by the crossed molecular beam scattering technique with universal mass spectrometric detection and time-of-flight analysis. The role of CN rovibrational excitation on the dynamics of the CN+C2H2 reaction is discussed with reference to previous dynamics and kinetics studies. These reactions are of interest in the chemistry of planetary atmospheres (Titan) and the interstellar medium as well as in combustion.
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