skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Connecting the Elementary Reaction Pathways of Criegee Intermediates to the Chemical Erosion of Squalene Interfaces during Ozonolysis

Journal Article · · Environmental Science and Technology

Criegee intermediates (CI), formed in alkene ozonolysis, are central for controlling the multiphase chemistry of organic molecules in both indoor and outdoor environments. Here in this study, we examine the heterogeneous ozonolysis of squalene, a key species in indoor air chemistry. Aerosol mass spectrometry is used to investigate how the ozone (O3) concentration, relative humidity (RH), and particle size control reaction rates and mechanisms. Although the reaction rate is found to be independent of RH, the reaction products and particle size depend upon H2O. Under dry conditions (RH = 3%) the reaction produces high-molecular-weight secondary ozonides (SOZ), which are known skin irritants, and a modest change in particle size. Increasing the RH reduces the aerosol size by 30%, while producing mainly volatile aldehyde products, increases potential respiratory exposure. Chemical kinetics simulations link the elementary reactions steps of CI to the observed kinetics, product distributions, and changes in particle size. The simulations reveal that ozonolysis occurs near the surface and is O3-transport limited. Finally, the observed secondary ozonides are consistent with the formation of mainly secondary CI, in contrast to gas-phase ozonolysis mechanisms.

Research Organization:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES). Chemical Sciences, Geosciences, and Biosciences Division
Grant/Contract Number:
AC02-05CH11231
OSTI ID:
1456986
Journal Information:
Environmental Science and Technology, Vol. 51, Issue 23; Related Information: © 2017 American Chemical Society.; ISSN 0013-936X
Publisher:
American Chemical Society (ACS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 42 works
Citation information provided by
Web of Science

References (44)

Secondary organic aerosol from limona ketone: insights into terpene ozonolysis via synthesis of key intermediates journal January 2007
Secondary Organic Aerosol Production from Terpene Ozonolysis. 1. Effect of UV Radiation journal September 2005
Roles of the human occupant in indoor chemistry journal February 2015
Ozone in Indoor Environments: Concentration and Chemistry journal December 2000
Reactions of ozone with human skin lipids: Sources of carbonyls, dicarbonyls, and hydroxycarbonyls in indoor air journal August 2009
Kinetics and Products from Heterogeneous Oxidation of Squalene with Ozone journal October 2016
Recent Advances in Indoor Chemistry journal April 2015
The National Human Activity Pattern Survey (NHAPS): a resource for assessing exposure to environmental pollutants journal July 2001
Potential reactions among indoor pollutants journal November 1997
Unexpectedly high indoor hydroxyl radical concentrations associated with nitrous acid journal July 2013
Production of the Hydroxyl Radical in Indoor Air journal January 1996
Epidermal desquamation journal December 2004
Sebaceous gland lipids journal March 2009
Ozone consumption and volatile byproduct formation from surface reactions with aircraft cabin materials and clothing fabrics journal February 2008
Gas-Phase Carboxylic Acids in a University Classroom: Abundance, Variability, and Sources journal April 2017
Impact of Human Presence on Secondary Organic Aerosols Derived from Ozone-Initiated Chemistry in a Simulated Office Environment journal April 2013
Chemical kinetics of multiphase reactions between ozone and human skin lipids: Implications for indoor air quality and health effects journal January 2017
Squalene in oils and fats from domestic and commercial fryings of potatoes journal March 2004
The Reactive–Diffusive Length of OH and Ozone in Model Organic Aerosols journal August 2016
Probing the Heterogeneous Ozonolysis of Squalene Nanoparticles by Photoemission journal October 2016
Heterogeneous oxidation of squalene film by ozone under various indoor conditions journal October 2009
Kinetics and Reaction Products of Ozone and Surface-Bound Squalene journal January 2008
ATR-IR Study of Ozone Initiated Heterogeneous Oxidation of Squalene in an Indoor Environment journal September 2013
The heterogeneous reaction of hydroxyl radicals with sub-micron squalane particles: a model system for understanding the oxidative aging of ambient aerosols journal January 2009
Investigating the chemical composition of mixed organic–inorganic particles by “soft” vacuum ultraviolet photoionization: The reaction of ozone with anthracene on sodium chloride particles journal December 2006
Stochastic methods for aerosol chemistry: a compact molecular description of functionalization and fragmentation in the heterogeneous oxidation of squalane aerosol by OH radicals journal January 2015
Sulfur Dioxide Accelerates the Heterogeneous Oxidation Rate of Organic Aerosol by Hydroxyl Radicals journal March 2016
Aerosol Fragmentation Driven by Coupling of Acid–Base and Free-Radical Chemistry in the Heterogeneous Oxidation of Aqueous Citric Acid by OH Radicals journal July 2017
Interaction between carbon or iron aerosol particles and ozone journal May 1995
Direct Measurements of Conformer-Dependent Reactivity of the Criegee Intermediate CH3CHOO journal April 2013
Direct measurement of Criegee intermediate (CH2OO) reactions with acetone, acetaldehyde, and hexafluoroacetone journal January 2012
Viscosity dependence of bond homolysis. Qualitative and semiquantitative test for cage return journal September 1970
The reactions of Criegee intermediates with alkenes, ozone, and carbonyl oxides journal January 2014
Gas-Phase Ozonolysis of Selected Olefins: The Yield of Stabilized Criegee Intermediate and the Reactivity toward SO 2 journal September 2012
Direct Measurements of Unimolecular and Bimolecular Reaction Kinetics of the Criegee Intermediate (CH 3 ) 2 COO journal December 2016
Computational Study of Hydrogen Shifts and Ring-Opening Mechanisms in α-Pinene Ozonolysis Products journal November 2015
Diffusive confinement of free radical intermediates in the OH radical oxidation of semisolid aerosols journal January 2017
O – O Bond Dissociation Energies in Propionyl and Butyryl Peroxides journal May 1955
EVAPORATION: a new vapour pressure estimation methodfor organic molecules including non-additivity and intramolecular interactions journal January 2011
Reactions of ozone with double bonds in polymer and biosystem chemistry journal December 2008
Isomeric Product Detection in the Heterogeneous Reaction of Hydroxyl Radicals with Aerosol Composed of Branched and Linear Unsaturated Organic Molecules journal November 2014
Radical Generation from the Gas-Phase Activation of Ionized Lipid Ozonides journal May 2017
Evaluation of the Contact and Respiratory Sensitization Potential of Volatile Organic Compounds Generated by Simulated Indoor Air Chemistry journal January 2007
DNA damage by carbonyl stress in human skin cells journal January 2003

Cited By (5)

The atmospheric chemistry of indoor environments journal January 2020
Visualizing reaction and diffusion in xanthan gum aerosol particles exposed to ozone journal January 2019
Chemical signatures of surface microheterogeneity on liquid mixtures journal January 2019
Detecting Intermediates and Products of Fast Heterogeneous Reactions on Liquid Surfaces via Online Mass Spectrometry journal January 2019
Visualizing reaction and diffusion in xanthan gum aerosol particles exposed to ozone text January 2019

Similar Records

Multiphase Mechanism for the Production of Sulfuric Acid from SO2 by Criegee Intermediates Formed During the Heterogeneous Reaction of Ozone with Squalene
Journal Article · Fri Jun 08 00:00:00 EDT 2018 · Journal of Physical Chemistry Letters · OSTI ID:1456986

Probing the Heterogeneous Ozonolysis of Squalene Nanoparticles by Photoemission
Journal Article · Mon Oct 17 00:00:00 EDT 2016 · Journal of Physical Chemistry. A, Molecules, Spectroscopy, Kinetics, Environment, and General Theory · OSTI ID:1456986

Chemically Activated Formation of Organic Acids in Reactions of the Criegee Intermediate with Aldehydes and Ketones
Journal Article · Thu Aug 08 00:00:00 EDT 2013 · Physical Chemistry Chemical Physics. PCCP, 15(39):16841-16852 · OSTI ID:1456986