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Title: The Reaction of Criegee Intermediate CH2OO with Water Dimer: Primary Products and Atmospheric Impact

Journal Article · · Physical Chemistry Chemical Physics. PCCP
DOI:https://doi.org/10.1039/c7cp03265j· OSTI ID:1374752
 [1];  [1];  [1];  [1];  [1];  [1];  [2];  [2];  [3]
  1. Sandia National Lab. (SNL-CA), Livermore, CA (United States)
  2. Univ. of Bristol, Cantock's Close (United Kingdom)
  3. Univ. of Manchester, Manchester (United Kingdom)

The rapid reaction of the smallest Criegee intermediate, CH2OO, with water dimers is the dominant removal mechanism for CH2OO in the Earth's atmosphere, but its products are not well understood. This reaction was recently suggested as a significant source of the most abundant tropospheric organic acid, formic acid (HCOOH), which is consistently underpredicted by atmospheric models. Furthermore, using time-resolved measurements of reaction kinetics by UV absorption and product analysis by photoionization mass spectrometry, we show that the primary products of this reaction are formaldehyde and hydroxymethyl hydroperoxide (HMHP), with direct HCOOH yields of less than 10%. Incorporating our results into a global chemistry-transport model further reduces HCOOH levels by 10–90%, relative to previous modeling assumptions, which indicates that the reaction CH2OO + water dimer by itself cannot resolve the discrepancy between the measured and predicted HCOOH levels.

Research Organization:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
AC04-94AL85000
OSTI ID:
1374752
Report Number(s):
SAND-2017-8272J; 655941
Journal Information:
Physical Chemistry Chemical Physics. PCCP, Vol. 19, Issue 33; ISSN 1463-9076
Publisher:
Royal Society of ChemistryCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 65 works
Citation information provided by
Web of Science

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Cited By (15)

Re-examining ammonia addition to the Criegee intermediate: converging to chemical accuracy journal January 2018
Criegee intermediates and their impacts on the troposphere journal January 2018
Effect of unsaturated substituents in the reaction of Criegee intermediates with water vapor journal January 2018
Thermochemistry of the smallest QOOH radical from the roaming fragmentation of energy selected methyl hydroperoxide ions journal January 2018
The reaction between the methyl Criegee intermediate and hydrogen chloride: an FTMW spectroscopic study journal January 2018
Kinetics of the reaction of the simplest Criegee intermediate with ammonia: a combination of experiment and theory journal January 2018
Experimental and computational studies of Criegee intermediate reactions with NH 3 and CH 3 NH 2 journal January 2019
Theoretical investigation on the reaction mechanism and kinetics of a Criegee intermediate with ethylene and acetylene journal January 2019
Observation of hydroperoxyethyl formate from the reaction between the methyl Criegee intermediate and formic acid journal January 2020
The reactivity of the Criegee intermediate CH 3 CHOO with water probed by FTMW spectroscopy journal January 2018
Unexpected quenching effect on new particle formation from the atmospheric reaction of methanol with SO 3 journal November 2019
The catalytic effects of H 2 CO 3 , CH 3 COOH, HCOOH and H 2 O on the addition reaction of CH 2 OO + H 2 O → CH 2 (OH)OOH journal April 2018
Unimolecular decay dynamics of Criegee intermediates: Energy-resolved rates, thermal rates, and their atmospheric impact journal December 2019
The atmospheric impacts of monoterpene ozonolysis on global stabilised Criegee intermediate budgets and SO 2 oxidation: experiment, theory and modelling journal January 2018
Chemistry and deposition in the Model of Atmospheric composition at Global and Regional scales using Inversion Techniques for Trace gas Emissions (MAGRITTE v1.1) – Part 1: Chemical mechanism journal January 2019

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