Is the reaction between CH3C(O)O-2 and NO3 important in the night-time troposphere?

CE CanosaMas, Martin King, R Lopez, CJ Percival, RP Wayne, DE Shallcross, JA Pyle, V Daele

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A discharge-flow system equipped with a laser-induced fluorescence (LIF) cell to detect NO2 and a multi-pass absorption cell to detect NO3 has been used to study the reactionCH3C(O)O-2+NO3-->CH3C(O)O+NO2+O-2 (1)at T = 403-443 K and P = 2-2.4 Torr. The rate constant was found to be independent of temperature with a value of k(1) = (4+/-1) x 10(-12) cm(3) molecule(-1) s(-1). The likely mechanism for the reaction is discussed. The atmospheric implications of reaction (1) are investigated using a range of models and several case studies are presented, comparing model results with actual held measurements. It is concluded that reaction (1) participates in a cycle which can generate OH at night. This reaction cycle (see text) can operate throughout the continental boundary layer, but may even occur in remote regions.
Original languageEnglish
Pages (from-to)2211-2222
Number of pages12
JournalJournal Of The Chemical Society-Faraday Transactions
Issue number12
Publication statusPublished - 1 Jan 1996


  • Observatory Photochemistry Experiment
  • Radicals
  • Atmosphere
  • Rate Constants
  • Thermal-Decomposition
  • Kinetics
  • Ho2
  • Oh
  • Peroxyacetyl Nitrate
  • Gas-Phase Reactions

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