Journal Article

FZJ-2021-04844

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Highly Oxygenated Organic Nitrates Formed from NO 3 Radical-Initiated Oxidation of β-Pinene

Shen, H. ; Zhao, D. (Corresponding author) ; Pullinen, I. ; Kang, S.FZJ* ; Vereecken, L.FZJ* ; Fuchs, H.FZJ* ; Acir, I.-H. ; Tillmann, R.FZJ* ; Rohrer, F.FZJ* ; Wildt, J. ; Kiendler-Scharr, A.FZJ* ; Wahner, A.FZJ* ; Mentel, T. F. (Corresponding author)FZJ*

2021
American Chemical Society Columbus, Ohio

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Please use a persistent id in citations: http://hdl.handle.net/2128/29532  doi:10.1021/acs.est.1c03978

Abstract: The reactions of biogenic volatile organic compounds (BVOC) with the nitrate radicals (NO3) are major night-time sources of organic nitrates and secondary organic aerosols (SOA) in regions influenced by BVOC and anthropogenic emissions. In this study, the formation of gas-phase highly oxygenated organic molecules-organic nitrates (HOM-ON) from NO3-initiated oxidation of a representative monoterpene, β-pinene, was investigated in the SAPHIR chamber (Simulation of Atmosphere PHotochemistry In a large Reaction chamber). Six monomer (C = 7–10, N = 1–2, O = 6–16) and five accretion product (C = 17–20, N = 2–4, O = 9–22) families were identified and further classified into first- or second-generation products based on their temporal behavior. The time lag observed in the peak concentrations between peroxy radicals containing odd and even number of oxygen atoms, as well as between radicals and their corresponding termination products, provided constraints on the HOM-ON formation mechanism. The HOM-ON formation can be explained by unimolecular or bimolecular reactions of peroxy radicals. A dominant portion of carbonylnitrates in HOM-ON was detected, highlighting the significance of unimolecular termination reactions by intramolecular H-shift for the formation of HOM-ON. A mean molar yield of HOM-ON was estimated to be 4.8% (−2.6%/+5.6%), suggesting significant HOM-ON contributions to the SOA formation.

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Contributing Institute(s):

1. Troposphäre (IEK-8)

Research Program(s):

1. 2111 - Air Quality (POF4-211) (POF4-211)

Appears in the scientific report 2021

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Database coverage:
; ; BIOSIS Previews ; Biological Abstracts ; Clarivate Analytics Master Journal List ; Current Contents - Agriculture, Biology and Environmental Sciences ; Ebsco Academic Search ; Essential Science Indicators ; IF >= 5 ; JCR ; Nationallizenz ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection ; Zoological Record

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