Sign up & Download
Sign in

Direct detection of OH formation in the reactions of HO2 with CH3C(O)O2 and other substituted peroxy radicals

by T J Dillon, J N Crowley
Atmospheric Chemistry and Physics ()

Abstract

This work details the first direct observation of OH as a product from (R1): HO2+ CH3C(O)O-2 (products), which has generally been considered an atmospheric radical termination process. The technique of pulsed laser photolysis radical generation, coupled to calibrated laser induced fluorescence detection was used to measure an OH product yield for (R1) of alpha(1) (298 K)=(0.5 0.2). This study of (R1) included the measurement of a rate coefficient k(1)(298 K) = 1.4 0.5) x 10(-11) cm(3) molecule(-1) s(-1), substantially reducing the uncertainties in modelling this important atmospheric reaction. OH was also detected as a product from the reactions of HO2 with three other carbonyl-containing peroxy radicals, albeit at smaller yield, e. g. (R2): HO2+ CH3C(O)CH2O2 (products), alpha(2) approximate to 0.15. By contrast, OH was not observed (alpha < 0.06) as a major product from reactions where carbonyl functionality was absent, e. g. HO2+ HOCH2CH2O2 (R8), and HO2+ CH3CH(OH)CH2O2 (R9).

Cite this document (BETA)

Readership Statistics

10 Readers on Mendeley
by Discipline
 
 
 
by Academic Status
 
40% Ph.D. Student
 
30% Assistant Professor
 
10% Student (Master)
by Country
 
10% Japan

Sign up today - FREE

Mendeley saves you time finding and organizing research. Learn more

  • All your research in one place
  • Add and import papers easily
  • Access it anywhere, anytime

Start using Mendeley in seconds!

Already have an account? Sign in