Details

Autor(en) / Beteiligte

• Caravan, Rebecca L
• Khan, M. Anwar H
• Rotavera, Brandon
• Papajak, Ewa
• Antonov, Ivan O
• Chen, Ming-Wei
• Au, Kendrew
• Chao, Wen
• Osborn, David L
• Lin, Jim Jr-Min
• Percival, Carl J
• Shallcross, Dudley E
• Taatjes, Craig A

Titel

Products of Criegee intermediate reactions with NO2: experimental measurements and tropospheric implications

Ist Teil von

• Faraday discussions, 2017-08, Vol.2, p.313-33

Ort / Verlag

United States

Erscheinungsjahr

2017

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• The reactions of Criegee intermediates with NO 2 have been proposed as a potentially significant source of the important nighttime oxidant NO 3 , particularly in urban environments where concentrations of ozone, alkenes and NO x are high. However, previous efforts to characterize the yield of NO 3 from these reactions have been inconclusive, with many studies failing to detect NO 3 . In the present work, the reactions of formaldehyde oxide (CH 2 OO) and acetaldehyde oxide (CH 3 CHOO) with NO 2 are revisited to further explore the product formation over a pressure range of 4-40 Torr. NO 3 is not observed; however, temporally resolved and [NO 2 ]-dependent signal is observed at the mass of the Criegee-NO 2 adduct for both formaldehyde- and acetaldehyde-oxide systems, and the structure of this adduct is explored through ab initio calculations. The atmospheric implications of the title reaction are investigated through global modelling.