The reactions IO + NO3 -->OIO + NO2, and I + NO3 --> IO + NO2, - rate coefficients and product yields by LIF

DILLON, T. J.; MARIA EUGENIA TUCCERI; CROWLEY, J. N.

Viena

Congreso; European Geosciences Union. General Assembly 2007; 2007

European Geosciences Union, EGU

The technique of pulsed laser photolysis coupled to LIF detection of IO was used to study the reactions (R1a) IO + NO3 --> OIO + NO2 and (R2) I + NO3-->! (products) at ambient temperature. The reaction (R1) was observed for the 1st time in the laboratory, and a lower-limit for the rate coefficient of k1a > 7×10-12 cm3 molecule-1 s-1 and a lower-limit for the rate coefficient of k1a > 7×10-12 cm3 molecule-1 s-1 and a lower-limit for the rate coefficient of k1a > 7×10-12 cm3 molecule-1 s-1 and a lower-limit for the rate coefficient of k1a > 7×10-12 cm3 molecule-1 s-1 at ambient temperature. The reaction (R1) was observed for the 1st time in the laboratory, and a lower-limit for the rate coefficient of k1a > 7×10-12 cm3 molecule-1 s-1 and a lower-limit for the rate coefficient of k1a > 7×10-12 cm3 molecule-1 s-1 and a lower-limit for the rate coefficient of k1a > 7×10-12 cm3 molecule-1 s-1 and a lower-limit for the rate coefficient of k1a > 7×10-12 cm3 molecule-1 s-1 3 --> OIO + NO2 and (R2) I + NO3-->! (products) at ambient temperature. The reaction (R1) was observed for the 1st time in the laboratory, and a lower-limit for the rate coefficient of k1a > 7×10-12 cm3 molecule-1 s-1 and a lower-limit for the rate coefficient of k1a > 7×10-12 cm3 molecule-1 s-1 and a lower-limit for the rate coefficient of k1a > 7×10-12 cm3 molecule-1 s-1 and a lower-limit for the rate coefficient of k1a > 7×10-12 cm3 molecule-1 s-1 st time in the laboratory, and a lower-limit for the rate coefficient of k1a > 7×10-12 cm3 molecule-1 s-1 and a lower-limit for the rate coefficient of k1a > 7×10-12 cm3 molecule-1 s-1 and a lower-limit for the rate coefficient of k1a > 7×10-12 cm3 molecule-1 s-1k1a > 7×10-12 cm3 molecule-1 s-1 is reported, which may explain anomalous ratios of OIO:IO observed in the night-time marine boundary layer. Other important results included the identification of IO (viavia laser excitation spectra around  = 445 nm) as the product of (R2) at approximately unity yield, and k2 = (1.0 ± 0.4)×10-10 cm3 molecule-1 s-1. The implications of these results for the night-time chemistry of the marine boundary layer are discussed. these results for the night-time chemistry of the marine boundary layer are discussed. these results for the night-time chemistry of the marine boundary layer are discussed. these results for the night-time chemistry of the marine boundary layer are discussed. unity yield, and k2 = (1.0 ± 0.4)×10-10 cm3 molecule-1 s-1. The implications of these results for the night-time chemistry of the marine boundary layer are discussed. these results for the night-time chemistry of the marine boundary layer are discussed. these results for the night-time chemistry of the marine boundary layer are discussed. these results for the night-time chemistry of the marine boundary layer are discussed.  = 445 nm) as the product of (R2) at approximately unity yield, and k2 = (1.0 ± 0.4)×10-10 cm3 molecule-1 s-1. The implications of these results for the night-time chemistry of the marine boundary layer are discussed. these results for the night-time chemistry of the marine boundary layer are discussed. these results for the night-time chemistry of the marine boundary layer are discussed. these results for the night-time chemistry of the marine boundary layer are discussed. k2 = (1.0 ± 0.4)×10-10 cm3 molecule-1 s-1. The implications of these results for the night-time chemistry of the marine boundary layer are discussed. these results for the night-time chemistry of the marine boundary layer are discussed. these results for the night-time chemistry of the marine boundary layer are discussed.