Synthesis and Characterization of Atmospherically Relevant Hydroxy Hydroperoxides

Hydroxy hydroperoxides are formed upon OH oxidation of volatile organic compounds in the atmosphere and may contribute to secondary aerosol growth aqueous phase chemistry after transfer particles. Although detection methods for oxidized improved much over past decades, limited availability synthetic standards atmospherically relevant hydroxy prevented comprehensive investigations most part. Here, we present a straightforward access isoprene-derived hydroperoxides, i.e., 1,2-ISOPOOH 4,3-ISOPOOH. Furthermore, first successful synthesis an α-pinene derived hydroperoxide. All products were identified by 1H, 13C NMR spectroscopy structure elucidation, additional 2D experiments performed. gas-phase FTIR- UV/VIS spectra presented time. Using measured absorption cross section, atmospheric photolysis rate up 2.1 × 10−3 s−1 was calculated 1,2-ISOPOOH. Moreover, investigation synthesized chamber study online MS techniques, namely PTR-ToFMS (NO3−)-CI-APi-ToFMS. Fragmentation patterns recorded during these as well. For (NO3−)-CI-APi-ToFMS, calibration factor 4.44 10−5 ncps·ppbv−1 LOD (3σ, 1 min average) = 0.70 ppbv.