Night-time atmospheric degradation of a series of butyl methacrylates

• Published in: Chemical physics letters 2016-11, Vol.664, p.205-212
• Main Authors: Teruel, Mariano A., López, Rocío S. Pérez, Barnes, Ian, Blanco, María B.
• Format: Article
• Language: English
• Subjects: iso-Butyl methacrylate; Mechanisms; n-Butyl methacrylate; NO3 radicals; Rate coefficients; tert-Butyl methacrylate; Tropospheric chemistry
• ISSN: 0009-2614; 1873-4448
• DOI: 10.1016/j.cplett.2016.09.040

[Display omitted] •First kinetic study of the reaction of NO3 with butyl methacrylate esters.•Experiments were performed in smog chamber using ‘in situ’ FTIR.•Reactivity trends and substituent effects were discussed.•Products distribution study was presented and discussed.•Atmospheric lifetimes of these esters were discussed. Rate coefficients for the reactions of NO3 with n-butyl methacrylate (k1), iso-butyl methacrylate (k2) and tert-butyl methacrylate (k3) have been determined at 298K and atmospheric pressure using the relative rate method. The following rate coefficients (×10−15cm3molecule−1s−1) were obtained for the first time: k1=(5.5±2.6), k2=(5.8±2.8) and k3=(5.6±2.5). The NO3 reactions of these compounds could contribute to the removal of NOx and as NOy reservoirs. The potential importance for the tropospheric nitrogen budget of these reactions is discussed and atmospheric lifetimes for the butyl esters are calculated.