Mark A. Blitz
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View article: First Direct Observation of Equilibrium Involving Cl Atoms: Cl + C <sub>2</sub> H <sub>4</sub> ⇔ ClCH <sub>2</sub> CH <sub>2</sub> by VUV Monitoring
First Direct Observation of Equilibrium Involving Cl Atoms: Cl + C <sub>2</sub> H <sub>4</sub> ⇔ ClCH <sub>2</sub> CH <sub>2</sub> by VUV Monitoring Open
The kinetics between Cl and ethylene, R1, have been determined between 298 and 822 K in time-resolved experiments, where the Cl atoms were monitored for the first time via laser-induced fluorescence at 118.877 nm. A key advantage of this m…
View article: Rate Coefficients and Branching Ratios for the Reaction of the OH Radical with Formic Acid under Low-Temperature Combustion Conditions and the Fate of the HOCO Product
Rate Coefficients and Branching Ratios for the Reaction of the OH Radical with Formic Acid under Low-Temperature Combustion Conditions and the Fate of the HOCO Product Open
Formic acid (FA, HC(O)OH) is of interest as an e-fuel and hydrogen carrier, as well as a significant component of atmospheric acidification. Reaction with the OH radical is a major removal process for FA. We have measured the overall rate …
View article: Experimental and Theoretical Study of the Kinetics of Dimerization of Ammonia at Low Temperatures
Experimental and Theoretical Study of the Kinetics of Dimerization of Ammonia at Low Temperatures Open
The kinetics of the dimerization of NH3 in helium and nitrogen bath gas within the supersonic flow of a Laval nozzle were investigated at very low temperatures. Experimentally, the fraction of the NH3 monomer, fmonomer, remaining in the fl…
View article: Development of a novel instrument for long-term measurements of OH reactivity&#160;
Development of a novel instrument for long-term measurements of OH reactivity  Open
Improving air quality is one of the main challenges in achieving a sustainable future. The mitigation strategies for air quality and climate change require accurate knowledge of both the amount of trace gases present in the atmosphere and …
View article: Kinetics of the Reaction Between the Criegee Intermediate CH<sub>2</sub>OO and NO<sub>2</sub>: Experimental Measurements and Comparison with Theory
Kinetics of the Reaction Between the Criegee Intermediate CH<sub>2</sub>OO and NO<sub>2</sub>: Experimental Measurements and Comparison with Theory Open
Kinetics of the gas phase reaction between the stabilized Criegee intermediate formaldehyde oxide (CH2OO) and nitrogen dioxide (NO2) have been measured using laser flash photolysis of CH2I2/O2/N2/NO2 mixtures coupled with time-resolved bro…
View article: Experimental and Theoretical Investigation of the Reaction of C<sub>2</sub>H with Formaldehyde (CH<sub>2</sub>O) at Very Low Temperatures and Application to Astrochemical Models
Experimental and Theoretical Investigation of the Reaction of C<sub>2</sub>H with Formaldehyde (CH<sub>2</sub>O) at Very Low Temperatures and Application to Astrochemical Models Open
Rate coefficients for the reaction of C2H with CH2O were measured for the first time over the temperature range of 37-603 K, with the C2H radicals produced by pulsed laser photolysis and detected by CH radical chemiluminescence following t…
View article: Temperature-Dependent, Site-Specific Rate Coefficients for the Reaction of OH (OD) with Methyl Formate Isotopologues via Experimental and Theoretical Studies
Temperature-Dependent, Site-Specific Rate Coefficients for the Reaction of OH (OD) with Methyl Formate Isotopologues via Experimental and Theoretical Studies Open
Methyl esters are an important component of combustion and atmospheric systems. Reaction with the OH radical plays an important role in the removal of the simplest methyl ester, methyl formate (MF, CH3OCHO). In this paper, the overall rate…
View article: Kinetics of the Gas-Phase Reactions of <i>syn</i>- and <i>anti</i>-CH<sub>3</sub>CHOO Criegee Intermediate Conformers with SO<sub>2</sub> as a Function of Temperature and Pressure
Kinetics of the Gas-Phase Reactions of <i>syn</i>- and <i>anti</i>-CH<sub>3</sub>CHOO Criegee Intermediate Conformers with SO<sub>2</sub> as a Function of Temperature and Pressure Open
Kinetics of reactions between SO2 and CH3CHOO Criegee intermediate conformers have been measured at temperatures between 242 and 353 K and pressures between 10 and 600 Torr using laser flash photolysis of CH3CHI2/O2/N2/SO2 gas mixtures cou…
View article: Solving the OH + Glyoxal Problem: A Complete Theoretical Description of Post-Transition-State Energy Deposition in Activated Systems
Solving the OH + Glyoxal Problem: A Complete Theoretical Description of Post-Transition-State Energy Deposition in Activated Systems Open
Activated chemistry in coupled reaction systems has broadened our understanding of the chemical kinetics. In the case of intermediates formed in gas phase abstraction reactions (e.g., OH + HC(O)C(O)H (glyoxal) →HC(O)CO + H2O), it is partic…
View article: Kinetics of the reactions of the Criegee intermediate CH<sub>2</sub>OO with water vapour: experimental measurements as a function of temperature and global atmospheric modelling
Kinetics of the reactions of the Criegee intermediate CH<sub>2</sub>OO with water vapour: experimental measurements as a function of temperature and global atmospheric modelling Open
The kinetics of reactions between the Criegee intermediate, CH 2 OO, and water vapour have been investigated between 262 and 353 K at 760 Torr using laser flash photolysis of CH 2 I 2 –O 2 –N 2 –H 2 O with broadband time-resolved UV absorp…
View article: Experimental and Theoretical Investigation of the Reaction of NH<sub>2</sub> with NO at Very Low Temperatures
Experimental and Theoretical Investigation of the Reaction of NH<sub>2</sub> with NO at Very Low Temperatures Open
The first experimental study of the low-temperature kinetics of the gas-phase reaction between NH2 and NO has been performed. A pulsed laser photolysis-laser-induced fluorescence technique was used to create and monitor the temporal decay …
View article: <i>Ab Initio</i> and Statistical Rate Theory Exploration of the CH (X<sup>2</sup>Π) + OCS Gas-Phase Reaction
<i>Ab Initio</i> and Statistical Rate Theory Exploration of the CH (X<sup>2</sup>Π) + OCS Gas-Phase Reaction Open
The first theoretical results regarding the gas-phase reaction mechanism and kinetics of the CH (X2Π) + OCS reaction are presented here. This reaction has a proposed importance in the removal of OCS in regions of the interstellar medium (I…
View article: New Measurements and Calculations on the Kinetics of an Old Reaction: OH + HO<sub>2</sub> → H<sub>2</sub>O + O<sub>2</sub>
New Measurements and Calculations on the Kinetics of an Old Reaction: OH + HO<sub>2</sub> → H<sub>2</sub>O + O<sub>2</sub> Open
Literature rate coefficients for the prototypical radical-radical reaction at 298 K vary by close to an order of magnitude; such variations challenge our understanding of fundamental reaction kinetics. We have studied the title reaction at…
View article: Studies on the Kinetics of the CH + H<sub>2</sub> Reaction and Implications for the Reverse Reaction, <sup>3</sup>CH<sub>2</sub> + H
Studies on the Kinetics of the CH + H<sub>2</sub> Reaction and Implications for the Reverse Reaction, <sup>3</sup>CH<sub>2</sub> + H Open
The reaction of CH radicals with H2 has been studied by the use of laser flash photolysis, probing CH decays under pseudo-first-order conditions using laser-induced fluorescence (LIF) over the temperature range 298-748 K at pressures of ∼5…
View article: Experimental and theoretical study of the low-temperature kinetics of the reaction of CN with CH<sub>2</sub>O and implications for interstellar environments
Experimental and theoretical study of the low-temperature kinetics of the reaction of CN with CH<sub>2</sub>O and implications for interstellar environments Open
Rate coefficients for the reaction of CN with CH 2 O were measured for the first time below room temperature in the range 32–103 K using a pulsed Laval nozzle apparatus together with the Pulsed Laser Photolysis–Laser-Induced Fluorescence t…
View article: Experimental, theoretical, and astrochemical modelling investigation of the gas-phase reaction between the amidogen radical (NH<sub>2</sub>) and acetaldehyde (CH<sub>3</sub>CHO) at low temperatures
Experimental, theoretical, and astrochemical modelling investigation of the gas-phase reaction between the amidogen radical (NH<sub>2</sub>) and acetaldehyde (CH<sub>3</sub>CHO) at low temperatures Open
The reaction of NH 2 and CH 3 CHO becomes fast at low temperatures, and may be a potential source of CH 3 CO radicals in the interstellar medium.
View article: HO<sub>2</sub> + NO<sub>2</sub>: Kinetics, Thermochemistry, and Evidence for a Bimolecular Product Channel
HO<sub>2</sub> + NO<sub>2</sub>: Kinetics, Thermochemistry, and Evidence for a Bimolecular Product Channel Open
A master equation (ME) analysis of available experimental data has been carried out on the reaction HO2 + NO2 + M ⇋ HO2NO2 + M (1a)/(-1a). The analysis, based on the ME code MESMER, uses both the association and dissociation kinetic data f…
View article: Unimolecular Kinetics of Stabilized CH<sub>3</sub>CHOO Criegee Intermediates: <i>syn</i>-CH<sub>3</sub>CHOO Decomposition and <i>anti</i>-CH<sub>3</sub>CHOO Isomerization
Unimolecular Kinetics of Stabilized CH<sub>3</sub>CHOO Criegee Intermediates: <i>syn</i>-CH<sub>3</sub>CHOO Decomposition and <i>anti</i>-CH<sub>3</sub>CHOO Isomerization Open
The kinetics of the unimolecular decomposition of the stabilized Criegee intermediate syn-CH3CHOO has been investigated at temperatures between 297 and 331 K and pressures between 12 and 300 Torr using laser flash photolysis of CH3CHI2/O2/…
View article: The Gas-phase Reaction of NH<sub>2</sub> with Formaldehyde (CH<sub>2</sub>O) is not a Source of Formamide (NH<sub>2</sub>CHO) in Interstellar Environments
The Gas-phase Reaction of NH<sub>2</sub> with Formaldehyde (CH<sub>2</sub>O) is not a Source of Formamide (NH<sub>2</sub>CHO) in Interstellar Environments Open
The first experimental study of the low-temperature kinetics of the gas-phase reaction of NH 2 with formaldehyde (CH 2 O) has been performed. This reaction has previously been suggested as a source of formamide (NH 2 CHO) in interstellar e…
View article: The gas-phase reaction of NH2 with formaldehyde (CH2O) is not a source of formamide (NH2CHO) in interstellar environments
The gas-phase reaction of NH2 with formaldehyde (CH2O) is not a source of formamide (NH2CHO) in interstellar environments Open
The first experimental study of the low-temperature kinetics of the gas-phase reaction of NH2 with formaldehyde (CH2O) has been performed. This reaction has previously been suggested as a source of formamide (NH2CHO) in interstellar enviro…
View article: Identification, monitoring, and reaction kinetics of reactive trace species using time-resolved mid-infrared quantum cascade laser absorption spectroscopy: development, characterisation, and initial results for the CH <sub>2</sub> OO Criegee intermediate
Identification, monitoring, and reaction kinetics of reactive trace species using time-resolved mid-infrared quantum cascade laser absorption spectroscopy: development, characterisation, and initial results for the CH <sub>2</sub> OO Criegee intermediate Open
The chemistry and reaction kinetics of reactive species dominate changes to the composition of complex chemical systems, including Earth's atmosphere. Laboratory experiments to identify reactive species and their reaction products, and to …
View article: Direct Measurements of Isoprene Autoxidation: Pinpointing Atmospheric Oxidation in Tropical Forests
Direct Measurements of Isoprene Autoxidation: Pinpointing Atmospheric Oxidation in Tropical Forests Open
2-Methyl-1,3-butadiene (isoprene), released from biogenic sources, accounts for approximately a third of hydrocarbon emissions and is mainly removed by hydroxyl radicals, OH, the primary initiator of atmospheric oxidation. In situ measurem…
View article: Comment on amt-2021-421
Comment on amt-2021-421 Open
Abstract. The chemistry and reaction kinetics of reactive species dominate changes to the composition of complex chemical systems, including Earth's atmosphere. Laboratory experiments to identify reactive species and their reaction product…
View article: Identification, monitoring, and reaction kinetics of reactive trace species using time-resolved mid-infrared quantum cascade laser absorption spectroscopy: Development, characterisation, and initial results for the Criegee intermediate CH <sub>2</sub> OO
Identification, monitoring, and reaction kinetics of reactive trace species using time-resolved mid-infrared quantum cascade laser absorption spectroscopy: Development, characterisation, and initial results for the Criegee intermediate CH <sub>2</sub> OO Open
The chemistry and reaction kinetics of reactive species dominate changes to the composition of complex chemical systems, including Earth’s atmosphere. Laboratory experiments to identify reactive species and their reaction products, and to …
View article: The reaction between HgBr and O<sub>3</sub>: kinetic study and atmospheric implications
The reaction between HgBr and O<sub>3</sub>: kinetic study and atmospheric implications Open
We have carried out the first kinetic study of the reaction between HgBr and O 3 using the PLP-LIF technique. Our results show that this reaction is the main atmospheric fate of the HgBr radical.
View article: Production of HONO from NO <sub>2</sub> uptake on illuminated TiO <sub>2</sub> aerosol particles and following the illumination of mixed TiO <sub>2</sub> ∕ammonium nitrate particles
Production of HONO from NO <sub>2</sub> uptake on illuminated TiO <sub>2</sub> aerosol particles and following the illumination of mixed TiO <sub>2</sub> ∕ammonium nitrate particles Open
The rate of production of HONO from illuminated TiO2 aerosols in the presence of NO2 was measured using an aerosol flow tube system coupled to a photo-fragmentation laser-induced fluorescence detection apparatus. The reactive uptake coeffi…
View article: Are iodic acid measurements by chemical ionization unambiguous? &#160;
Are iodic acid measurements by chemical ionization unambiguous?   Open
<p>Field observations of IO<sup>3&#8722;</sup> and HIO<sup>3&#8722;</sup>-containing cluster anions by chemical ionization&#8211;atmospheric pressure interface&#8211;time-of-flight mass spectro…
View article: Kinetics of the gas phase reaction of the Criegee intermediate CH<sub>2</sub>OO with SO<sub>2</sub>as a function of temperature
Kinetics of the gas phase reaction of the Criegee intermediate CH<sub>2</sub>OO with SO<sub>2</sub>as a function of temperature Open
The kinetics of the gas phase reaction of the Criegee intermediate CH 2 OO with SO 2 have been studied as a function of temperature in the range 223–344 K at 85 Torr using flash photolysis of CH 2 I 2 /O 2 /SO 2 /N 2 mixtures at 248 nm cou…
View article: Determination of the absorption cross sections of higher-order iodine oxides at 355 and 532 nm
Determination of the absorption cross sections of higher-order iodine oxides at 355 and 532 nm Open
Iodine oxides (IxOy) play an important role in the atmospheric chemistry of iodine. They are initiators of new particle formation events in the coastal and polar boundary layers and act as iodine reservoirs in tropospheric ozone-depleting …