The reaction of IO with CH3SCH3: products and temperature dependent rate coefficients by laser induced fluorescence

2006 ◽  
Vol 8 (7) ◽  
pp. 847 ◽  
Author(s):  
Terry J. Dillon ◽  
Rosalin Karunanandan ◽  
John N. Crowley
Keyword(s):  
Laser Induced Fluorescence ◽  
Rate Coefficients ◽  
Temperature Dependent ◽  
Dependent Rate

Temperature dependent rate coefficients for the reaction of OH radicals with dimethylbenzoquinones

2015 ◽  
Vol 639 ◽  
pp. 145-150 ◽  
Author(s):  
Iustinian Bejan ◽  
Ian Barnes ◽  
Peter Wiesen ◽  
John C. Wenger
Keyword(s):  
Rate Coefficients ◽  
Oh Radicals ◽  
Temperature Dependent ◽  
Dependent Rate

Gas-phase ozonolysis of β-ocimene: Temperature dependent rate coefficients and product distribution

2016 ◽  
Vol 147 ◽  
pp. 46-54 ◽  
Author(s):  
Elizabeth Gaona-Colmán ◽  
María B. Blanco ◽  
Ian Barnes ◽  
Mariano A. Teruel
Keyword(s):  
Gas Phase ◽  
Product Distribution ◽  
Rate Coefficients ◽  
Temperature Dependent ◽  
Dependent Rate

Temperature‐dependent rate coefficients for the gas‐phase OH + furan‐2,5‐dione (C 4 H 2 O 3 , maleic anhydride) reaction

2020 ◽  
Vol 52 (10) ◽  
pp. 623-631 ◽  
Author(s):  
Aparajeo Chattopadhyay ◽  
Vassileios C. Papadimitriou ◽  
Paul Marshall ◽  
James B. Burkholder
Keyword(s):  
Maleic Anhydride ◽  
Gas Phase ◽  
Rate Coefficients ◽  
Temperature Dependent ◽  
Dependent Rate

Temperature Dependent Rate Coefficients for the Gas-Phase Reaction of the OH Radical with Linear (L2, L3) and Cyclic (D3, D4) Permethylsiloxanes

2018 ◽  
Vol 122 (17) ◽  
pp. 4252-4264 ◽  
Author(s):  
François Bernard ◽  
Dimitrios K. Papanastasiou ◽  
Vassileios C. Papadimitriou ◽  
James B. Burkholder
Keyword(s):  
Gas Phase ◽  
Rate Coefficients ◽  
Phase Reaction ◽  
Oh Radical ◽  
Temperature Dependent ◽  
Gas Phase Reaction ◽  
Dependent Rate

scholarly journals Atmospheric sink of methyl chlorodifluoroacetate and ethyl chlorodifluoroacetate: temperature dependent rate coefficients, product distribution of their reactions with Cl atoms and CF2ClC(O)OH formation

RSC Advances ◽  
2016 ◽  
Vol 6 (57) ◽  
pp. 51834-51844
Author(s):  
María B. Blanco ◽  
Ian Barnes ◽  
Peter Wiesen ◽  
Mariano A. Teruel
Keyword(s):  
Relative Rate ◽  
Product Distribution ◽  
Rate Coefficients ◽  
Gas Phase Reactions ◽  
Temperature Dependent ◽  
Dependent Rate ◽  
P Rate ◽  
Distribution Studies ◽  
First Time ◽  
Cl Atoms

Rate coefficients as a function of temperature and product distribution studies have been performed for the first time for the gas-phase reactions of chlorine atoms with methyl chlorodifluoracetate (k1) and ethyl chlorodifluoroacetate (k2) using the relative rate technique.

scholarly journals N(4S3/2) reaction with NO and NO2: Temperature dependent rate coefficients and O(3P) product yield

2019 ◽  
Vol 728 ◽  
pp. 102-108
Author(s):  
Dimitrios K. Papanastasiou ◽  
Jeremy Bourgalais ◽  
Tomasz Gierczak ◽  
James B. Burkholder
Keyword(s):  
Product Yield ◽  
Rate Coefficients ◽  
Temperature Dependent ◽  
Dependent Rate

scholarly journals The Reaction of Sulfur Dioxide Radical Cation with Hydrogen and Its Relevance in Solar Geoengineering Models

2020 ◽  
Author(s):  
Mauro Satta ◽  
Antonella Cartoni ◽  
Daniele Catone ◽  
Mattea Carmen Castrovilli ◽  
Paola Bolognesi ◽  
...  
Keyword(s):  
Ozone Depletion ◽  
State Theory ◽  
Rate Coefficients ◽  
Aerosol Formation ◽  
Temperature Dependent ◽  
Dependent Rate ◽  
Ionization Sources ◽  
Analytic Expressions ◽  
Solar Geoengineering ◽  
The Common

<p>In recent years solar geoengineering has been proposed as a promising strategy to contrast global warming induced by anthropogenic CO<sub>2</sub> emissions. These technologies design to inject in the stratosphere massive amounts of molecular species, which can act as precursors for aerosol formation able to partially reflect sunlight. SO<sub>2</sub> is one of these species. Since in the atmosphere several natural ionization sources, such as cosmic rays and corona discharge, are active, we have considered that SO<sub>2</sub><sup>+</sup> ions can be formed in the stratosphere in a significant amount after being injected by balloons or aircrafts. The SO<sub>2</sub><sup>+ </sup>chemistry could play a role in the dynamics of aerosol formation as a cooling agent. We have studied theoretically and experimentally the reaction of SO<sub>2</sub><sup>+</sup>, produced by tunable synchrotron radiation, with H<sub>2</sub> leading to HSO<sub>2</sub><sup>+</sup> and H, the latter being involved in the ozone depletion by producing O<sub>2 </sub>and OH. This is an ionic possible alternative to OH formation during the nighttime, when the common sunlight process of OH generation cannot occur. In order to explain the experimental reactivity we propose a new non-thermal version of the Variational Transition State Theory. We provide analytic expressions for the temperature dependent rate coefficients, which should be tested in atmospheric kinetic models to fully explore the stratospheric solar geoengineering strategies.</p>

scholarly journals Temperature dependent rate coefficients for the reactions of the hydroxyl radical with the atmospheric biogenics isoprene, <i>α</i>-pinene and Δ-3-carene

2017 ◽  
Author(s):  
Terry J. Dillon ◽  
Katrin Dulitz ◽  
Christoph M. B. Gross ◽  
John N. Crowley
Keyword(s):  
Cross Sections ◽  
Room Temperature ◽  
Relative Rate ◽  
Gas Pressure ◽  
Rate Coefficients ◽  
Absorption Cross ◽  
Temperature Dependent ◽  
Degradation Reactions ◽  
Dependent Rate ◽  
Accuracy And Precision

Abstract. Abstract. Pulsed laser methods for OH generation and detection were used to study atmospheric degradation reactions for three important biogenic gases: OH + isoprene (R1); OH + α-pinene (R2); and OH + Δ-3-carene (R3). Gas-phase rate coefficients were characterised by non-Arrhenius kinetics for all three reactions. For (R1), k1 (241–356 K) = (1.93 ± 0.08) × 10−11 exp (466 ± 12)/T cm3 molecule−1 s−1 was determined, with a room temperature value of k1 (297 K) = (9.3 ± 0.4) × 10−11 cm3 molecule−1 s−1, independent of bath-gas pressure (5–200 Torr) and composition (M = N2 or air). Accuracy and precision were enhanced by online optical monitoring of isoprene, with absolute concentrations obtained via an absorption cross-section, σisoprene = (1.28 ± 0.06) × 10−17 cm2 molecule−1 at λ = 184.95 nm, determined in this work. These results indicate that significant discrepancies between previous absolute and relative rate determinations of k1 result in part from σ values used to derive the isoprene concentration. Similar methods were used to determine rate coefficients (in 10−11 cm3 molecule−1 s−1) for (R2–R3): k2 (238–357 K) = (1.83 ± 0.04) × exp (330 ± 6)/T; and k3 (235–357 K) = (2.48 ± 0.14) × exp (357 ± 17)/T. This is the first temperature-dependent dataset for (R3) and enables the calculation of reliable atmospheric lifetimes with respect to OH removal for e.g. boreal forest springtime conditions. Room temperature values of k2 (296 K) = (5.4 ± 0.2) × 10−11 cm3 molecule−1 s−1 and k3 (297 K) = (8.1 ± 0.3) × 10−11 cm3 molecule−1 s−1 were independent of bath-gas pressure (7–200 Torr, N2 or air), and in good agreement with previously reported values. In the course of this work, 184.95 nm absorption cross-sections were determined: σ = (1.54 ± 0.08) × 10−17cm 2 molecule−1 for α-pinene and (2.40 ± 0.12) × 10−17  cm2 molecule−1 for Δ-3-carene.

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