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  Criegee Intermediate Reactions with Carboxylic Acids: A Potential Source of Secondary Organic Aerosol in the Atmosphere

Chhantyal-Pun, R., Rotavera, B., McGillen, M., Khan, M., Eskola, A., Caravan, R., et al. (2018). Criegee Intermediate Reactions with Carboxylic Acids: A Potential Source of Secondary Organic Aerosol in the Atmosphere. ACS Earth and Space Chemistry, 2(8), 833-842.

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Datensatz-Permalink: https://hdl.handle.net/21.11116/0000-000E-D97C-3 Versions-Permalink: https://hdl.handle.net/21.11116/0000-000E-D97D-2
Genre: Zeitschriftenartikel

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Chhantyal-Pun, R., Autor
Rotavera, B., Autor
McGillen, M., Autor
Khan, M., Autor
Eskola, A., Autor
Caravan, R., Autor
Blacker, L., Autor
Tew, D.1, Autor
Osborn, D., Autor
Percival, C., Autor
Taatjes, C., Autor
Shallcross, D., Autor
Orr-Ewing, A., Autor
Affiliations:
1Max Planck Society, ou_persistent13              

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Schlagwörter: Criegee Intermediate; Carboxylic Acids; Atmospheric Chemistry; Hydroperoxide Ester; SOA
 Zusammenfassung: Trace atmospheric concentrations of carboxylic acids have a potent effect upon the environment, where they modulate aqueous chemistry and perturb Earth's radiative balance. Halogenated carboxylic acids are produced by the tropospheric oxidation of halocarbons and are considered persistent pollutants because of their weak tropospheric and aqueous sinks. However, recent studies reported rapid reactions between selected carboxylic acids and Criegee intermediates, which may provide an efficient gas-phase removal process. Accordingly, absolute rate coefficients of two Criegee intermediates, CH2OO and (CH3)(2)COO, with a suite of carboxylic acids (HCOOH, CH3COOH, CClF2COOH, CF3CF2COOH, and pyruvic acid) were measured with a view to develop a structure activity relationship (SAR). This SAR is based upon the dipole-capture model and predicts the reactivity of many further combinations of Criegee intermediates and carboxylic acids. Complementary synchrotron-based photoionization mass spectrometry measurements demonstrate that these reactions produce stable ester adducts, with a reaction coordinate involving transfer of the acidic hydrogen from the carboxylic acid to the terminal oxygen of the Criegee intermediate. The adduct products are predicted to have low vapor pressures, and coupling of this chemistry with a global atmospheric chemistry and transport model shows significant production of secondary organic aerosol at locations rich in biogenic alkene emissions.

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Sprache(n): eng - English
 Datum: 2018
 Publikationsstatus: Erschienen
 Seiten: -
 Ort, Verlag, Ausgabe: -
 Inhaltsverzeichnis: -
 Art der Begutachtung: Expertenbegutachtung
 Identifikatoren: eDoc: 744684
ISI: 000442461700008
 Art des Abschluß: -

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Titel: ACS Earth and Space Chemistry
Genre der Quelle: Zeitschrift
 Urheber:
Affiliations:
Ort, Verlag, Ausgabe: WASHINGTON : AMER CHEMICAL SOC
Seiten: - Band / Heft: 2 (8) Artikelnummer: - Start- / Endseite: 833 - 842 Identifikator: ISSN: 2472-3452