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Nat Commun

Title:		Structures and reactivity of peroxy radicals and dimeric products revealed by online tandem mass spectrometry
Author(s):		Tomaz S; Wang D; Zabalegui N; Li D; Lamkaddam H; Bachmeier F; Vogel A; Monge ME; Perrier S; Baltensperger U; George C; Rissanen M; Ehn M; El Haddad I; Riva M;
Address:		"Univ Lyon, Universite Claude Bernard Lyon 1, CNRS, IRCELYON, 69626, Villeurbanne, France. Laboratory of Atmospheric Chemistry, Paul Scherrer Institute, 5232, Villigen, Switzerland. Centro de Investigaciones en Bionanociencias (CIBION), Consejo Nacional de Investigaciones Cientificas y Tecnicas (CONICET), Godoy Cruz 2390, C1425FQD, Ciudad de Buenos Aires, Argentina. Departamento de Quimica Inorganica, Analitica y Quimica Fisica, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, C1428EGA, Buenos Aires, Argentina. Institute for Atmospheric and Environmental Sciences, Goethe-University Frankfurt, 60438, Frankfurt am Main, Germany. Institute for Atmospheric and Earth System Research, INAR /Physics, Faculty of Science, University of Helsinki, FI-00014, Helsinki, Finland. Aerosol Physics Laboratory, Physics Unit, Faculty of Engineering and Natural Sciences, Tampere University, FI-33101, Tampere, Finland. Univ Lyon, Universite Claude Bernard Lyon 1, CNRS, IRCELYON, 69626, Villeurbanne, France. matthieu.riva@ircelyon.univ-lyon1.fr"
Journal Title:		Nat Commun
Year:		2021
Volume:		20210112
Issue:		1
Page Number:		300 -
DOI:		10.1038/s41467-020-20532-2
ISSN/ISBN:		2041-1723 (Electronic) 2041-1723 (Linking)
Abstract:		"Organic peroxy radicals (RO(2)) play a pivotal role in the degradation of hydrocarbons. The autoxidation of atmospheric RO(2) radicals produces highly oxygenated organic molecules (HOMs), including low-volatility ROOR dimers formed by bimolecular RO(2) + RO(2) reactions. HOMs can initiate and greatly contribute to the formation and growth of atmospheric particles. As a result, HOMs have far-reaching health and climate implications. Nevertheless, the structures and formation mechanism of RO(2) radicals and HOMs remain elusive. Here, we present the in-situ characterization of RO(2) and dimer structure in the gas-phase, using online tandem mass spectrometry analyses. In this study, we constrain the structures and formation pathway of several HOM-RO(2) radicals and dimers produced from monoterpene ozonolysis, a prominent atmospheric oxidation process. In addition to providing insights into atmospheric HOM chemistry, this study debuts online tandem MS analyses as a unique approach for the chemical characterization of reactive compounds, e.g., organic radicals"
Keywords:
Notes:		"PubMed-not-MEDLINETomaz, Sophie Wang, Dongyu Zabalegui, Nicolas Li, Dandan Lamkaddam, Houssni Bachmeier, Franziska Vogel, Alexander Monge, Maria Eugenia Perrier, Sebastien Baltensperger, Urs George, Christian Rissanen, Matti Ehn, Mikael El Haddad, Imad Riva, Matthieu eng Research Support, Non-U.S. Gov't England 2021/01/14 Nat Commun. 2021 Jan 12; 12(1):300. doi: 10.1038/s41467-020-20532-2"