Using the pulse radiolysis WV absorption technique and subsequent simulations of experimental absorption transients at and 276 nm, upper limits of the rate constants for the reactions of CF302 and CF,O radicals with ozone were determined at K, CF302 t OI-+CF,Ot 202 (4), CF,O t 03+CF302+02 (5). The u
Absolute rate constants for the reaction of CF3O2 and CF3O radicals with NO at 295 K
β Scribed by Jens Sehested; Ole John Nielsen
- Publisher
- Elsevier Science
- Year
- 1993
- Tongue
- English
- Weight
- 589 KB
- Volume
- 206
- Category
- Article
- ISSN
- 0009-2614
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β¦ Synopsis
Using a pulse radiolysis UV absorption technique and subsequent simulations of experimental NO1 and FNO absorption transients, rate constants for reaction between CF90 and CFsO2 radicals with NO were determined, CFp02+NO+CF,O+N02 (3 ), CF,OtNO~CF,OtFNO(5).k~wasderivedtobe(1.68~0.26)X10~~'cm3molecuIe~'s~L,andk~=(5.2f2.7)X1O~"cm3 molecule-' s-l. Results are discussed in the context of the atmospheric chemistry of halocarbons.
π SIMILAR VOLUMES
Rate constant ratios of the reactions of CFsO radicals with a number of hydrocarbons have been determiued at 298 + 2 K and atmospheric pressure using a relative rate method. Using a previously determined value k(CF,O+ CsHs) = I .2 x lo-i2 cm3 molecule-' s-i these rate constant mtios,provide estimate
The kinetics of the self-reactions of HO 2 , CF 3 CFHO 2 , and CF 3 O 2 radicals and the cross reactions of HO 2 with FO 2 , HO 2 with CF 3 CFHO 2 , and HO 2 with CF 3 O 2 radicals, were studied by pulse radiolysis combined with time resolved UV absorption spectroscopy at 295 K. The rate constants f
The rate constants for the reactions CF302 + NO ~ CF30+NO 2 (1) and CF30+NO~ products (2) have been measured at room temperature using a fast flow reactor associated with a monitoring of CF30 radicals by laser induced fluorescence (LIF); for the measurement of k~, CF30 radicals are prepared by the d
Flash photolysis/time-resolved UV absorption measurements of the rate constants for the title reactions are reported over the temperature range 2 lo-253 K. The photolysis of F2/CF,H/03/02/N, gas mixtures reveals that the formation of CF302 and CF,O radicals has no measurable effect on the ozone conc
The linear absorption cross-sections and photodissociation quantum yields for C F 3 N 0 have been measured at the wavelengths 694 3 and 632 8 nm (ruby and He-Ne lasers respectively) in a wide range of total pressure at T = 296 K The secondary reactions following the photolysis of C F 3 N 0 have been