title: Heterogeneous Chemistry of Lipopolysaccharides with Gas-Phase Nitric Acid: Reactive Sites and Reaction Pathways.
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.
authors.affiliation: Department of Chemistry & Biochemistry, ‡Scripps Institution of Oceanography, and §Department of Nanoengineering, University of California San Diego , La Jolla, California 92093, United States.
authors.forename: Jonathan V
authors.initials: JV
authors.lastname: Trueblood
authors.affiliation: Department of Chemistry & Biochemistry, ‡Scripps Institution of Oceanography, and §Department of Nanoengineering, University of California San Diego , La Jolla, California 92093, United States.
authors.forename: Armando D
authors.initials: AD
authors.lastname: Estillore
authors.affiliation: Department of Chemistry & Biochemistry, ‡Scripps Institution of Oceanography, and §Department of Nanoengineering, University of California San Diego , La Jolla, California 92093, United States.
authors.forename: Christopher
authors.initials: C
authors.lastname: Lee
authors.affiliation: Department of Chemistry & Biochemistry, ‡Scripps Institution of Oceanography, and §Department of Nanoengineering, University of California San Diego , La Jolla, California 92093, United States.
authors.forename: Jacqueline A
authors.initials: JA
authors.lastname: Dowling
authors.affiliation: Department of Chemistry & Biochemistry, ‡Scripps Institution of Oceanography, and §Department of Nanoengineering, University of California San Diego , La Jolla, California 92093, United States.
authors.forename: Kimberly A
authors.initials: KA
authors.lastname: Prather
authors.affiliation: Department of Chemistry & Biochemistry, ‡Scripps Institution of Oceanography, and §Department of Nanoengineering, University of California San Diego , La Jolla, California 92093, United States.
authors.forename: Vicki H
authors.initials: VH
authors.lastname: Grassian
mesh_terms: D000336:Aerosols / Q000737:chemistry; D005740:Gases / Q000737:chemistry; D008070:Lipopolysaccharides / Q000737:chemistry*; D017942:Nitric Acid / Q000737:chemistry*; D012623:Seawater / Q000737:chemistry
chemical_list: D000336:Aerosols; D005740:Gases; D008070:Lipopolysaccharides; D017942:Nitric Acid