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

Temperature-dependent rate coefficients and mechanism for the gas-phase reaction of chlorine atoms with acetone

2010 ◽  
Vol 42 (12) ◽  
pp. 724-734 ◽  
Author(s):  
Manolis N. Romanias ◽  
Vassileios G. Stefanopoulos ◽  
Dimitrios K. Papanastasiou ◽  
Vassileios C. Papadimitriou ◽  
Panos Papagiannakopoulos
Keyword(s):  
Gas Phase ◽  
Rate Coefficients ◽  
Phase Reaction ◽  
Temperature Dependent ◽  
Chlorine Atoms ◽  
Gas Phase Reaction ◽  
Dependent Rate

Experimental and theoretical rate coefficients for the gas phase reaction of β-Pinene with OH radical

2013 ◽  
Vol 79 ◽  
pp. 161-171 ◽  
Author(s):  
Manas Ranjan Dash ◽  
B. Rajakumar
Keyword(s):  
Gas Phase ◽  
Rate Coefficients ◽  
Phase Reaction ◽  
Oh Radical ◽  
Gas Phase Reaction

scholarly journals Rate coefficients for the gas-phase reaction of OH with <i>Z</i>-3-hexen-1-ol, 1-penten-3-ol, <i>E</i>-2-penten-1-ol, and <i>E</i>-2-hexen-1-ol between 243 and 404 K

2011 ◽  
Vol 11 (1) ◽  
pp. 2377-2405 ◽  
Author(s):  
M. E. Davis ◽  
J. B. Burkholder
Keyword(s):  
Gas Phase ◽  
Negative Temperature ◽  
Rate Coefficients ◽  
Oh Radicals ◽  
Phase Reaction ◽  
Oh Radical ◽  
Gas Phase Reaction ◽  
First Order ◽  
Unsaturated Alcohols ◽  
Temperature Dependences

Abstract. Rate coefficients, k, for the gas-phase reaction of the OH radical with (Z)-3-hexen-1-ol ((Z)-CH3CH2CH=CHCH2CH2OH). (k1), 1-penten-3-ol (CH3CH2CH(OH)CH=CH2) (k2), (E)-2-penten-1-ol ((E)-CH3CH2CH=CHCH2OH) (k3), and (E)-2-hexen-1-ol ((E)-CH3CH2CH2CH=CHCH2OH) (k4), unsaturated alcohols that are emitted into the atmosphere following vegetation wounding, are reported. Rate coefficients were measured under pseudo-first-order conditions in OH over the temperature range 243–404 K at pressures between 20 and 100 Torr (He) using pulsed laser photolysis (PLP) to produce OH radicals and laser induced fluorescence (LIF) to monitor the OH temporal profile. The obtained rate coefficients were independent of pressure with negative temperature dependences that are well described by the Arrhenius expressions k1(T) = (1.3 ± 0.1) × 10−11 exp[(580 ± 10)/T]; k1(297K) = (1.06 ± 0.12) × 10−10 k2(T) = (6.8 ± 0.7) × 10−12 exp[(690 ± 20)/T]; k2(297K) = (7.12 ± 0.73) × 10−11 k3(T) = (6.8 ± 0.8) × 10−12 exp[(680 ± 20)/T]; k3(297K) = (6.76 ± 0.70) × 10−11 k4(T) = (5.4 ± 0.6) × 10−12 exp[(690 ± 20)/T]; k4(297K) = (6.15 ± 0.75) × 10−11 (in units of cm3 molecule−1 s−1). The quoted uncertainties are at the 2σ (95% confidence) level and include estimated systematic errors. The rate coefficients obtained in this study are compared with literature values where possible.

Rate Coefficients for the Gas-Phase Reaction of (E)- and (Z)-CF3CF═CFCF3 with the OH Radical and Cl-Atom

2019 ◽  
Vol 123 (24) ◽  
pp. 5051-5060 ◽  
Author(s):  
Munkhbayar Baasandorj ◽  
Vassileios C. Papadimitriou ◽  
James B. Burkholder
Keyword(s):  
Gas Phase ◽  
Rate Coefficients ◽  
Phase Reaction ◽  
Oh Radical ◽  
Gas Phase Reaction ◽  
Cl Atom

Temperature Dependent Rate Constants for the Gas-Phase Reaction between OH and CH3OCl

1996 ◽  
Vol 100 (9) ◽  
pp. 3601-3606 ◽  
Author(s):  
John N. Crowley ◽  
Pedro Campuzano-Jost ◽  
Geert K. Moortgat
Keyword(s):  
Gas Phase ◽  
Rate Constants ◽  
Phase Reaction ◽  
Temperature Dependent ◽  
Gas Phase Reaction ◽  
Dependent Rate

scholarly journals Rate coefficients for the gas-phase reaction of OH with (<i>Z</i>)-3-hexen-1-ol, 1-penten-3-ol, (<i>E</i>)-2-penten-1-ol, and (<i>E</i>)-2-hexen-1-ol between 243 and 404 K

2011 ◽  
Vol 11 (7) ◽  
pp. 3347-3358 ◽  
Author(s):  
M. E. Davis ◽  
J. B. Burkholder
Keyword(s):  
Gas Phase ◽  
Negative Temperature ◽  
Rate Coefficients ◽  
Oh Radicals ◽  
Phase Reaction ◽  
Oh Radical ◽  
Gas Phase Reaction ◽  
First Order ◽  
Unsaturated Alcohols ◽  
Temperature Dependences

Abstract. Rate coefficients, k, for the gas-phase reaction of the OH radical with (Z)-3-hexen-1-ol (Z)-CH3CH2CH = CHCH2CH2OH) (k1), 1-penten-3-ol (CH3CH2CH(OH)CH = CH2) (k2), (E)-2-penten-1-ol ((E)-CH3CH2CH = CHCH2OH) (k3), and (E)-2-hexen-1-ol ((E)-CH3CH2CH2CH = CHCH2OH) (k4), unsaturated alcohols that are emitted into the atmosphere following vegetation wounding, are reported. Rate coefficients were measured under pseudo-first-order conditions in OH over the temperature range 243–404 K at pressures between 20 and 100 Torr (He) using pulsed laser photolysis (PLP) to produce OH radicals and laser induced fluorescence (LIF) to monitor the OH temporal profile. The obtained rate coefficients were independent of pressure with negative temperature dependences that are well described by the Arrhenius expressions k1(T) = (1.3 ± 0.1) × 10−11 exp[(580 ± 10)/T]; k1(297 K) = (1.06 ± 0.12) × 10−10 k2(T) = (6.8 ± 0.7) × 10−12 exp[(690 ± 20)/T]; k2(297 K) = (7.12 ± 0.73) × 10−11 k3(T) = (6.8 ± 0.8) × 10−12 exp[(680 ± 20)/T]; k3(297 K) = (6.76 ± 0.70) × 10−11 k4(T) = (5.4 − 0.6) × 10−12 exp[(690 ± 20)/T]; k4(297 K) = (6.15 ± 0.75) × 10−11 (in units of cm3 molecule−1 s−1). The quoted uncertainties are at the 2σ (95% confidence) level and include estimated systematic errors. The rate coefficients obtained in this study are compared with literature values where possible.

Rate coefficients for the gas-phase reaction of OH radical with α-pinene: an experimental and computational study

2013 ◽  
Vol 112 (11) ◽  
pp. 1495-1511 ◽  
Author(s):  
Manas Ranjan Dash ◽  
M. Balaganesh ◽  
B. Rajakumar
Keyword(s):  
Gas Phase ◽  
Computational Study ◽  
Rate Coefficients ◽  
Phase Reaction ◽  
Oh Radical ◽  
Gas Phase Reaction

scholarly journals Temperature dependent kinetics of the gas-phase reaction of OH radicals with EMS

2011 ◽  
Vol 56 (4-5) ◽  
pp. 391-396
Author(s):  
Kun Wang ◽  
MaoFa Ge ◽  
WeiGang Wang
Keyword(s):  
Gas Phase ◽  
Oh Radicals ◽  
Phase Reaction ◽  
Temperature Dependent ◽  
Gas Phase Reaction ◽  
Kinetics Of

scholarly journals Reactive quenching of electronically excited NO<sub>2</sub><sup>∗</sup> and NO<sub>3</sub><sup>∗</sup> by H<sub>2</sub>O as potential sources of atmospheric HO<sub><i>x</i></sub> radicals

2018 ◽  
Vol 18 (19) ◽  
pp. 14005-14015 ◽  
Author(s):  
Terry J. Dillon ◽  
John N. Crowley
Keyword(s):  
Gas Phase ◽  
Laser Excitation ◽  
Pulsed Laser ◽  
Work Rate ◽  
Rate Coefficients ◽  
Phase Reaction ◽  
Gas Phase Reaction ◽  
Upper Limit ◽  
Upper Limits ◽  
Electronically Excited

Abstract. Pulsed laser excitation of NO2 (532–647 nm) or NO3 (623–662 nm) in the presence of H2O was used to initiate the gas-phase reaction NO2∗+H2O → products (Reaction R5) and NO3∗+H2O → products (Reaction R12). No evidence for OH production in Reactions (R5) or (R12) was observed and upper limits for OH production of k5b/k5<1×10-5 and k12b/k12<0.03 were assigned. The upper limit for k5b∕k5 renders this reaction insignificant as a source of OH in the atmosphere and extends the studies (Crowley and Carl, 1997; Carr et al., 2009; Amedro et al., 2011) which demonstrate that the previously reported large OH yield by Li et al. (2008) was erroneous. The upper limit obtained for k12b∕k12 indicates that non-reactive energy transfer is the dominant mechanism for Reaction (R12), though generation of small but significant amounts of atmospheric HOx and HONO cannot be ruled out. In the course of this work, rate coefficients for overall removal of NO3∗ by N2 (Reaction R10) and by H2O (Reaction R12) were determined: k10=(2.1±0.1)×10-11 cm3 molecule−1 s−1 and k12=(1.6±0.3)×10-10 cm3 molecule−1 s−1. Our value of k12 is more than a factor of 4 smaller than the single previously reported value.

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