A laser photolysis–resonance fluorescence study of the reactions: I + O3→ IO + O2, O + I2→ IO + I, and I + NO2+ M → INO2+ M at 298 K

Tucceri, María E.; Dillon, Terry J.; Crowley, John N.

doi:10.1039/b502844b

Cited by 21 publications

(15 citation statements)

References 30 publications

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“…The reaction of I atom with O 3 has been well studied; the literature value of k I+O3 is (1.28±0.06)×10 −12 cm 3 sec −1 . 41 The lowest [O 3 ] in our experiment is at least 1.6×10 15 cm −3 . Thus, I atoms would be quickly converted into IO due to the fast reaction rate (k…”

Section: Resultsmentioning

confidence: 55%

Kinetics of the simplest Criegee intermediate reaction with ozone studied using a mid-infrared quantum cascade laser spectrometer

Chang

Lin

2018

Phys. Chem. Chem. Phys.

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The kinetics of the reaction of CHOO with ozone has been studied by monitoring CHOO using time-resolved infrared (IR) absorption spectroscopy, which utilized the fast chirped IR pulse train from a quantum cascade laser [J. Chem. Phys., 2017, 146, 244302]. CHOO was prepared by photolyzing a gas mixture of CHI/O/O at 352 nm; the photolysis wavelength was chosen to minimize the photodissociation of O. The measured rate coefficient at 298 K and 30 Torr is (6.7 ± 0.5) × 10 cm s, independent of pressure from 30 to 100 Torr. The result indicates that previous ab initio calculations either underestimated or overestimated this reaction rate by one order of magnitude or more. The result also implies that, the reaction of the Criegee intermediate with ozone may play a role in laboratory studies of ozonolysis of alkenes. However, this reaction would not compete with other CHOO sinks in the atmosphere.

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Section: Resultsmentioning

confidence: 55%

Kinetics of the simplest Criegee intermediate reaction with ozone studied using a mid-infrared quantum cascade laser spectrometer

Chang

Lin

2018

Phys. Chem. Chem. Phys.

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“…The obtained temperature-dependent rate coefficients in the present study for the reaction of R3 differ by 0-13% when compared with Turnipseed et al [37] ((2.3 ± 0.7) × 10 −11 exp[−(860 ± 100)/T] cm 3 molecule −1 s −1 ) over the available temperature range of 240-370K. The obtained rate coefficient for the reaction of R3 differs by 2% and 28% at 298 K when compared with Tucceri et al [35] ((1.28 ± 0.06) × 10 −12 cm 3 molecule −1 s −1 ) and Sander [36] ((9.5 ± 1.5) × 10 −13 cm 3 molecule −1 s −1 ), respectively.…”

Section: Reaction Of I + Osupporting

confidence: 49%

Kinetics of the Reactions of Ozone with Halogen Atoms in the Stratosphere

2021

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It is well established that reaction cycles involving inorganic halogens contribute to the depletion of ozone in the atmosphere. Here, the kinetics of O3 with halogen atoms (Cl, Br, and I) were investigated between 180 and 400 K, expanding the temperature range relative to prior studies. Canonical variational transition state theory including small curvature tunneling correction (CVT/SCT) were considered, following the construction of the potential energy surfaces. MRCI + Q/aug-ano-pVTZ//MP2/aug-cc-pV(T + d)Z and MRCI + Q/aug-ano-RCC-VTZP//MP2/aug-cc-pV(T + d)Z levels of theory were used to calculate the kinetic parameters. Calculated rate coefficients were used to fit the Arrhenius equations, which are obtained to be k1 = (3.48 ± 0.4) × 10−11 exp[(−301 ± 64)/T] cm3 molecule−1 s−1, k2 = (3.54 ± 0.2) × 10−11 exp[(−990 ± 35)/T] cm3 molecule−1 s−1 and k3 = (1.47 ± 0.1) × 10−11 exp[(−720 ± 42)/T] cm3 molecule−1 s−1 for the reactions of O3 with Cl, Br, and I atoms, respectively. The obtained rate coefficients for the reactions of O3 with halogen atoms using CVT/SCT are compared to the latest recommended rate coefficients by the NASA/JPL and IUPAC evaluations. The reactivity trends and pathways of these reactions are discussed.

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“…[7][8][9] Recent laboratory studies have increased the data available for gas-phase I and IO reactions. 1,2,[10][11][12][13][14][15][16][17] Large uncertainties remain however, regarding the formation and loss processes for OIO, and the nighttime chemistry of the ''active iodine'' species I, IO and OIO. 18,19 nighttime observations of IO, BrO and OIO at a mixing ratio of up to 10 ppt cannot be explained by known chemistry and have kindled interest in this area of research.…”

Section: And Other Product Channnels) (R6)mentioning

confidence: 99%

“…The rate coefficients for reactions (R5) and (R9), recently measured 12 in this laboratory are (in units of cm 3 molecule À1 s À1 ):…”

Section: And Other Product Channnels) (R6)mentioning

confidence: 99%

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LIF studies of iodine oxide chemistry : Part 3. Reactions IO + NO3 → OIO + NO2, I + NO3 → IO + NO2, and CH2I + O2 → (products): implications for the chemistry of the marine atmosphere at night

Dillon

Tucceri

Sander

et al. 2008

Phys. Chem. Chem. Phys.

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The technique of pulsed laser photolysis coupled to LIF detection of IO was used to study IO + NO(3) --> OIO + NO(2); I + NO(3) --> (products); CH(2)I + O(2) --> (products); and O((3)P) + CH(2)I(2) --> IO + CH(2)I, at ambient temperature. was observed for the first time in the laboratory and a rate coefficient of k(1 a) = (9 +/- 4) x 10(-12) cm(3) molecule(-1) s(-1) obtained. For , a value of k(2) (298 K) = (1.0 +/- 0.3) x 10(-10) cm(3) molecule(-1) s(-1) was obtained, and a IO product yield close to unity determined. IO was also formed in a close-to-unity yield in , whereas in an upper limit of alpha(3)(IO) < 0.12 was derived. The implications of these results for the nighttime chemistry of the atmosphere were discussed. Box model calculations showed that efficient OIO formation in was necessary to explain field observations of large OIO/IO ratios.

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A laser photolysis–resonance fluorescence study of the reactions: I + O₃→ IO + O₂, O + I₂→ IO + I, and I + NO₂+ M → INO₂+ M at 298 K

Cited by 21 publications

References 30 publications

Kinetics of the simplest Criegee intermediate reaction with ozone studied using a mid-infrared quantum cascade laser spectrometer

Kinetics of the simplest Criegee intermediate reaction with ozone studied using a mid-infrared quantum cascade laser spectrometer

Kinetics of the Reactions of Ozone with Halogen Atoms in the Stratosphere

LIF studies of iodine oxide chemistry : Part 3. Reactions IO + NO3 → OIO + NO2, I + NO3 → IO + NO2, and CH2I + O2 → (products): implications for the chemistry of the marine atmosphere at night

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