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Unimolecular Decay of Criegee Intermediates to OH Radical Products: Prompt and Thermal Decay Processes

Journal Article · · Accounts of Chemical Research

Alkene ozonolysis is a primary oxidation pathway for anthropogenic and biogenic alkenes emitted into the troposphere. It is also an important source of atmospheric hydroxyl (OH) radicals, often called the atmosphere's detergent. Alkene ozonolysis takes place through a highly exothermic reaction pathway with multiple intermediates and barriers prior to releasing the OH radical products. Here, this Account focuses on a key reaction intermediate with a carbonyl oxide functional group (-COO), known as the Criegee intermediate, which is formed along with a carbonyl coproduct in alkene ozonolysis reactions. Under atmospheric conditions, the initially energized Criegee intermediates may promptly decay to OH products or be collisionally stabilized prior to thermal decay to OH radicals and other products.

Research Organization:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Grant/Contract Number:
AC02-06CH11357
OSTI ID:
1461467
Journal Information:
Accounts of Chemical Research, Journal Name: Accounts of Chemical Research Journal Issue: 4 Vol. 51; ISSN 0001-4842
Publisher:
American Chemical SocietyCopyright Statement
Country of Publication:
United States
Language:
English

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Cited By (8)

Rapid unimolecular reaction of stabilized Criegee intermediates and implications for atmospheric chemistry journal May 2019
DFT studies on quantum mechanical tunneling in tautomerization of three-membered rings journal January 2018
Formation of Criegee intermediates and peroxy acids: a computational study of gas-phase 1,3-cycloaddition of ozone with catechol journal January 2019
Threshold photoelectron spectrum of the CH 2 OO Criegee intermediate journal January 2019
Rate coefficient of the reaction CH 2 OO + NO 2 probed with a quantum-cascade laser near 11 μm journal January 2019
Detailed mechanism and kinetics of the reaction of Criegee intermediate CH 2 OO with HCOOH investigated via infrared identification of conformers of hydroperoxymethyl formate and formic acid anhydride journal January 2019
Fourier-transform microwave spectroscopy on weakly bound complexes of CH 2 OO with Ar, CO, and N 2 journal August 2019
Unimolecular decay dynamics of Criegee intermediates: Energy-resolved rates, thermal rates, and their atmospheric impact journal December 2019

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