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Direct detection of OH formation in the reactions of HO 2 with CH 3 C(O)O 2 and other substituted peroxy radicals
Open accessAbstract
Abstract. This work details the first direct observation of OH as a product from (R1): HO2+CH3C(O)O2→(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 α1(298 K)=(0.5±0.2). This study of (R1) included the measurement of a rate coefficient k1(298 K)=(1.4±0.5)×10−11cm3 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), α2≈0.15. By contrast, OH was not observed (α<0.06) as a major product from reactions where carbonyl functionality was absent, e.g. HO2+HOCH2CH2O2 (R8), and HO2+CH3CH(OH)CH2O2 (R9).
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Metadata
- Authors
- Dillon, T. J., & Crowley, J. N.
- Venue
- Atmospheric Chemistry and Physics
- Publisher
- Copernicus GmbH
- Published
- 2008-08-26
- Volume
- 8
- Issue
- 16
- Pages
- 4877-4889
- ISSN
- 1680-7316 (ISSN-L)
- 1680-7324
- OpenAlex
- W2127188489
- Cited by
- 174
- References
- 0
- FWCI
- 8.45
- Type
- journal article
- Language
- en
- Open access
- gold
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- Dillon, T. J., & Crowley, J. N. (2008). Direct detection of OH formation in the reactions of HO 2 with CH 3 C(O)O 2 and other substituted peroxy radicals. Atmospheric Chemistry and Physics. https://doi.org/10.5194/acp-8-4877-2008
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