Journal Article FZJ-2021-04150

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The impact of water vapor on the OH reactivity toward CH 3 CHO at ultra-low temperatures (21.7–135.0 K): Experiments and theory

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2021
American Institute of Physics Melville, NY

The journal of chemical physics 155(3), 034306 - () [10.1063/5.0054859]

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Abstract: The role of water vapor (H2O) and its hydrogen-bonded complexes in the gas-phase reactivity of organic compounds with hydroxyl (OH) radicals has been the subject of many recent studies. Contradictory effects have been reported at temperatures between 200 and 400 K. For the OH + acetaldehyde reaction, a slight catalytic effect of H2O was previously reported at temperatures between 60 and 118 K. In this work, we used Laval nozzle expansions to reinvestigate the impact of H2O on the OH-reactivity with acetaldehyde between 21.7 and 135.0 K. The results of this comprehensive study demonstrate that water, instead, slows down the reaction by factors of ∼3 (21.7 K) and ∼2 (36.2–89.5 K), and almost no effect of added H2O was observed at 135.0 K

Classification:

Contributing Institute(s):
  1. Troposphäre (IEK-8)
Research Program(s):
  1. 2111 - Air Quality (POF4-211) (POF4-211)

Appears in the scientific report 2021
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Medline ; Embargoed OpenAccess ; Clarivate Analytics Master Journal List ; Current Contents - Physical, Chemical and Earth Sciences ; Ebsco Academic Search ; Essential Science Indicators ; IF < 5 ; JCR ; National-Konsortium ; NationallizenzNationallizenz ; PubMed Central ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection
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 Record created 2021-11-08, last modified 2024-07-09


Published on 2021-04-22. Available in OpenAccess from 2022-04-22.:
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