✦ LIBER ✦

Upper limits for the rate constants of the reactions of CF3O2 and CF3O radicals with ozone at 295 K

✍ Scribed by Ole John Nielsen; Jens Sehested

Publisher: Elsevier Science
Year: 1993
Tongue: English
Weight: 783 KB
Volume: 213
Category: Article
ISSN: 0009-2614
DOI: 10.1016/0009-2614(93)89139-9

No coin nor oath required. For personal study only.

✦ Synopsis

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 upper limits were derivedas k.,<O.5X LO-l4 cm3 molecule-' s-', and k5 < 1 x 1 O-'3 cm3 molecule-' s-'. Results are discussed in the context of the atmospheric chemistry and ozone depletion by hydrofluorocarbons.

📜 SIMILAR VOLUMES

Absolute rate constants for the reaction

Absolute rate constants for the reaction of CF3O2 and CF3O radicals with NO at 295 K

✍ Jens Sehested; Ole John Nielsen 📂 Article 📅 1993 🏛 Elsevier Science 🌐 English ⚖ 589 KB

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

Upper limits for the rate constants of t

Upper limits for the rate constants of the reactions CF3O+O3→CF3O2+O2 and CF3O2+O3→CF3O+2O2

✍ M. Matti Maricq; Joseph J. Szente 📂 Article 📅 1993 🏛 Elsevier Science 🌐 English ⚖ 673 KB

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

Rate constants for the reaction of CF3O

Rate constants for the reaction of CF3O radicals with hydrocarbons at 298 K

✍ Christina Kelly; Jack Treacy; Howard W. Sidebottom; Ole John Nielsen 📂 Article 📅 1993 🏛 Elsevier Science 🌐 English ⚖ 523 KB

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

Absolute rate constants for the self rea

Absolute rate constants for the self reactions of HO2, CF3CFHO2, and CF3O2 radicals and the cross reactions of HO2 with FO2, HO2 with CF3CFHO2, and HO2 with CF3O2 at 295 K

✍ Jens Sehested; Trine Møgelberg; Kjell Fagerström; Gharib Mahmoud; Timothy J. Wal 📂 Article 📅 1997 🏛 John Wiley and Sons 🌐 English ⚖ 175 KB 👁 2 views

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

Flow tube/LIF measurements of the rate c

Flow tube/LIF measurements of the rate constants for the reactions with NO of CF3O and CF3O2 radicals

✍ C. Bourbon; M. Brioukov; B. Hanoune; J.P. Sawerysyn; P. Devolder 📂 Article 📅 1996 🏛 Elsevier Science 🌐 English ⚖ 598 KB

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

Rate constants for the gas-phase reactio

Rate constants for the gas-phase reaction of CF3CF2CF2CF2CF2CHF2 with OH radicals at 250–430 K

✍ L. Chen; K. Tokuhashi; S. Kutsuna; A. Sekiya 📂 Article 📅 2003 🏛 John Wiley and Sons 🌐 English ⚖ 128 KB 👁 1 views

## Abstract The rate constants __k__~1~ for the reaction of CF~3~CF~2~CF~2~CF~2~CF~2~CHF~2~ with OH radicals were determined by using both absolute and relative rate methods. The absolute rate constants were measured at 250–430 K using the flash photolysis–laser‐induced fluorescence (FP‐LIF) techni