About the co-product of the OH radical in the reaction of acetyl with O2 below atmospheric pressure |
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| Institution: | 1. Physicochimie des Processus de Combustion et de l’Atmosphère, UMR CNRS 8522, FR CNRS 2416 CERLA, Université des Sciences et Technologies de Lille1, 59655 Villeneuve d’Ascq Cedex, France;2. Physique des Lasers, Atomes, Molecules, UMR CNRS 8523, FR CNRS 2416 CERLA, Université des Sciences et Technologies de Lille1, 59655 Villeneuve d’Ascq Cedex, France;1. Department of Chemistry, Brown University, Providence, RI 02912, USA;2. Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China;3. Department of Physics, State Key Laboratory of Low-Dimensional Quantum Physics, Tsinghua University, Beijing 100084, China;1. Department of Chemistry, University of California, Berkeley, CA 94720, United States;2. Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA;1. V.E. Zuev Institute of Atmospheric Optics SB RAS, Academician Zuev Square 1, Tomsk 634021, Russia;2. National Research Tomsk State University, Lenina Av. 36, Tomsk 634050, Russia |
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| Abstract: | Recent studies have shown that the reaction between acetyl radicals and O2 at low pressures leads to the direct fast formation of OH radical, but the nature of co-products is controversial. Laser photolysis coupled to TDLAS (10–200 Torr, 298 K) has been employed to directly monitor two possible co-products of this reaction, CO and formaldehyde. Only CH2O has been detected in yield of 0.29 ± 0.13, but with time constants much slow than the OH formation under these conditions; the observed CH2O-time profiles are compatible with the known mechanism of peroxyacetyl secondary reactions. |
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