Direct Measurements of Removal Rates of CHF(X˜1A′(0, 1, 0)) by Simple Alkenes. Issue 1 (1992)

• Record Type: Journal Article
• Authors: Fernández, José A.; de Zárate, Alfredo Ortiz; Rayo, María N. Sánchez; Castaño, Fernando
• Is Part Of: Laser chemistry. Volume 12:Issue 1/2(1992)
• Page Start: 43
• Page End: 52
• Publication Date: 1992
• Subjects: Lasers in chemistry -- Periodicals; 542.8
• DOI: 10.1155/LC.12.43
• Languages: English
• ISSNs: 0278-6273

Abstract

Abstract : Direct measurements of the rate constants for collisional removal of CHF( X ˜ 1 A ′ ( 0, 1, 0 ) ) by argon (Ar), ethylene (C2 H4 ), propene (C3 H6 ), 1-butene (1-C4 H8 ), iso-butene (i-C4 H8 ), 1, 3-butadiene (C4 H6 ), are reported. CHF( X ˜ 1 A ′ ( 0, 1, 0 ) ) was prepared by IRMPD of precursor CH2 F2 . Fluence independence removal rate constants by Ar, ethylene and propene are: 0.0045, 2.70 and 2.46 × 10 −11 cm 3 molecule −1 s −1, faster than the rates for the vibrational ground state. 1, 3-butadiene was measured at a fluence of 42Jcm −2, yielding a value of 0.81 × 10 −11 cm 3 molecule −1 s −1 . Iso-butene has fluence dependence removal rates, given 1.28 and 0.92 × 10 −11 cm 3 molecule −1 s −1 for fluences of 50 and 32Jcm −2 respectively. For 1-butene a non-linear Stern-Volmer behaviour has been observed and attributed to fast resonant vibrational-to-vibrational ( V -to- V ) intermolecular energy transfer. The influence of this ( V -to- V ) energy transfer on the removal rates is discussed.