Rate coefficients for the gas-phase reaction of isoprene with NO3 and NO2

摘要: Rate coefficients for the gas-phase reaction of isoprene with nitrate radicals and nitrogen dioxide were determined. A Teflon collapsible chamber solid phase micro extraction (SPME) sampling gas chromatography flame ionization detection (GC/FID) a glass reactor long-path FTIR spectroscopy used to study NO3 radical using relative rate technique trans-2-butene 2-buten-1-ol (crotyl alcohol) as reference compounds. The obtained are k(isoprene + NO3) = (5.3 ± 0.2) × 10−13 (7.3 0.9) compounds 2-buten-1-ol, respectively. The NO2 was studied under pseudo-first-order conditions both in excess over other reactant. coefficient NO2) (1.15 0.08) 10−19. apparent air when decay followed (1.5 discrepancy is explained by fast formation peroxy nitrates. Nitro- nitrito-substituted isoprene-peroxynitrate tentatively identified products from this reaction. All experiments conducted at room temperature atmospheric pressure or synthetic air. All units cm3 molecule−1 s−1, errors three standard deviations linear least square analyses experimental data. © 2004 Wiley Periodicals, Inc. Int J Chem Kinet 37: 57–65, 2005