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000902287 1001_ $$00000-0002-6662-7784$$aNeeman, E. M.$$b0
000902287 245__ $$aThe impact of water vapor on the OH reactivity toward CH 3 CHO at ultra-low temperatures (21.7–135.0 K): Experiments and theory
000902287 260__ $$aMelville, NY$$bAmerican Institute of Physics$$c2021
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000902287 520__ $$aThe 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
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000902287 7001_ $$0P:(DE-HGF)0$$aGonzález, D.$$b1
000902287 7001_ $$00000-0002-2523-6242$$aBlázquez, S.$$b2
000902287 7001_ $$00000-0003-4853-9956$$aBallesteros, B.$$b3
000902287 7001_ $$00000-0001-5719-9899$$aCanosa, A.$$b4
000902287 7001_ $$00000-0001-6769-0470$$aAntiñolo, M.$$b5
000902287 7001_ $$0P:(DE-Juel1)167140$$aVereecken, L.$$b6$$eCorresponding author
000902287 7001_ $$00000-0001-8776-6807$$aAlbaladejo, J.$$b7
000902287 7001_ $$0P:(DE-HGF)0$$aJiménez, E.$$b8$$eCorresponding author
000902287 773__ $$0PERI:(DE-600)1473050-9$$a10.1063/5.0054859$$gVol. 155, no. 3, p. 034306 -$$n3$$p034306 -$$tThe journal of chemical physics$$v155$$x1089-7690$$y2021
000902287 8564_ $$uhttps://juser.fz-juelich.de/record/902287/files/5.0054859.pdf$$yPublished on 2021-04-22. Available in OpenAccess from 2022-04-22.
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