[
    {
        "id": "authors:mz4vf-vxr22",
        "collection": "authors",
        "collection_id": "mz4vf-vxr22",
        "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20120816-094502355",
        "type": "conference_item",
        "title": "Formation of organosulfates from the photooxidation of isoprene and a-pinene",
        "author": [
            {
                "family_name": "Eddingsaas",
                "given_name": "N. C.",
                "orcid": "0000-0003-1539-5415",
                "clpid": "Eddingsaas-Nathan-C"
            },
            {
                "family_name": "Chan",
                "given_name": "A. W.",
                "orcid": "0000-0001-7392-4237",
                "clpid": "Chan-Arthur-W-H"
            },
            {
                "family_name": "Chan",
                "given_name": "M.",
                "orcid": "0000-0002-2384-2695",
                "clpid": "Chan-Man-Nin"
            },
            {
                "family_name": "Chhabra",
                "given_name": "P. S.",
                "clpid": "Chhabra-Puneet-S"
            },
            {
                "family_name": "Loza",
                "given_name": "C. L.",
                "clpid": "Loza-Christine-L"
            },
            {
                "family_name": "Yee",
                "given_name": "L. D.",
                "orcid": "0000-0001-8965-9319",
                "clpid": "Yee-Lindsay-D"
            },
            {
                "family_name": "Surratt",
                "given_name": "J. D.",
                "orcid": "0000-0002-6833-1450",
                "clpid": "Surratt-Jason-D"
            },
            {
                "family_name": "Seinfeld",
                "given_name": "J. H.",
                "orcid": "0000-0003-1344-4068",
                "clpid": "Seinfeld-J-H"
            },
            {
                "family_name": "Wennberg",
                "given_name": "P. O.",
                "orcid": "0000-0002-6126-3854",
                "clpid": "Wennberg-P-O"
            }
        ],
        "abstract": "Organosulfates of a no. of biogenic volatile org. compds. (BVOCs) have been obsd. both in lab.-generated and ambient\nsecondary org. aerosol (SOA). While organosulfates are potentially an important component of SOA, relatively little is\nknown about how they form and their aerosol mass concns. Organosulfates are most prevalent in acidic aerosols contg.\nhigh concns. of sulfate. A no. of mechanisms have been proposed for the aerosol-phase formation of organosulfates,\nincluding alc. esterification, aldehyde esterification, epoxide ring-opening, and sulfate-radical initiated reactions. In order\nto det. which mechanism produces organosulfates from a given VOC, the gas-phase precursor must first be detd. To\nelucidate the gas-phase precursor of organosulfates from isoprene and a-pinene, photooxidn. expts. were performed in\nthe Caltech dual 28-m3 environmental chamber in the presence of a no. of different aerosol seeds varying in acidity and\nsulfate concn. The gas-phase compn. was followed by chem. ionization mass spectrometry and GC-FID and the\naerosol-phase compn. was detd. by aerosol mass spectrometry and a no. of off-line mass spectrometric techniques from\nchamber filter samples. For isoprene, epoxydiols were detd. to be a main gas-phase precursor of the C5 trihydroxy\nsulfate ester found in many aerosol samples. The aq.-phase ring-opening reactions of epoxydiols was studied by NMR\nfrom solns. of H2SO4/Na2SO4 where trihydroxy sulfate esters were found to form in yields of up to 32% in solns. contg.\n1 M SO42-. Similar studies were also performed to det. the gas-phase precursor of organosulfates from the photooxidn.\nof \u03b1-pinene.",
        "publisher": "Caltech Library",
        "publication_date": "2010-12"
    }
]