TY - JOUR
T1 - Direct detection of OH formation in the reactions of HO2 with CH3C(O)O2 and other substituted peroxy radicals
AU - Dillon, T.J.
AU - Crowley, J.N.
PY - 2008/8/5
Y1 - 2008/8/5
N2 - This work details the first direct observation of OH as a product from (R1): HO+CHC(O)O→(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 α(298K)=(0.5±0.2). This study of (R1) included the measurement of a rate coefficient k(298 K)=(1.4±0.5) × 10cm molecule s, substantially reducing the uncertainties in modelling this important atmospheric reaction. OH was also detected as a product from the reactions of HO with three other carbonyl-containing peroxy radicals, albeit at smaller yield, e.g. (R2): HO+CHC(O)CHO →(products), α0.15. By contrast, OH was not observed (α
AB - This work details the first direct observation of OH as a product from (R1): HO+CHC(O)O→(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 α(298K)=(0.5±0.2). This study of (R1) included the measurement of a rate coefficient k(298 K)=(1.4±0.5) × 10cm molecule s, substantially reducing the uncertainties in modelling this important atmospheric reaction. OH was also detected as a product from the reactions of HO with three other carbonyl-containing peroxy radicals, albeit at smaller yield, e.g. (R2): HO+CHC(O)CHO →(products), α0.15. By contrast, OH was not observed (α
UR - http://www.scopus.com/inward/record.url?scp=50549101963&partnerID=8YFLogxK
U2 - 10.5194/acpd-8-7111-2008
DO - 10.5194/acpd-8-7111-2008
M3 - Article
AN - SCOPUS:50549101963
SN - 1680-7316
VL - 8
SP - 4877
EP - 4889
JO - Atmospheric Chemistry and Physics
JF - Atmospheric Chemistry and Physics
IS - 16
ER -