Heterogeneous chemistry of lipopolysaccharides with gas-phase nitric acid: Reactive sites and reaction pathways

TitleHeterogeneous chemistry of lipopolysaccharides with gas-phase nitric acid: Reactive sites and reaction pathways
Publication TypeJournal Article
Year of Publication2016
AuthorsTrueblood J.V, Estillore A.D, Lee C., Dowling J.A, Prather KA, Grassian VH
JournalJournal of Physical Chemistry A
Volume120
Pagination6444-6450
Date Published2016/08
Type of ArticleArticle
ISBN Number1089-5639
Accession NumberWOS:000381778400015
Keywordsatmosphere; basicities; chloride; escherichia-coli; molecules; ocean; particles; proton-binding; sea spray aerosol; spectroscopy
Abstract

Recent studies have shown that sea spray aerosol (SSA) has a size-dependent, complex composition consisting of biomolecules and biologically derived organic compounds in addition to salts. This additional chemical complexity most likely influences the heterogeneous reactivity of SSA, as these other components will have different reactive sites and reaction pathways. In this study, we focus on the reactivity of a class of particles derived from some of the biological components of sea spray aerosol including lipopolysaccharides (LPS) that undergo heterogeneous chemistry within the reactive sites of the biological molecule. Examples of these reactions and the relevant reactive sites are proposed as follows: R-COONa(s) + HNO3(g) -> NaNO3 + R-COOH and R-HPO4Na(s) + HNO3(g) -> NaNO3 + R-H2PO4. These reactions may be a heterogeneous pathway not only for sea spray aerosol but also for a variety of other types of atmospheric aerosol as well.

DOI10.1021/acs.jpca.6b07023
Short TitleJ. Phys. Chem. A
Student Publication: 
No