Physics
Scientific paper
Dec 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007georl..3424811s&link_type=abstract
Geophysical Research Letters, Volume 34, Issue 24, CiteID L24811
Physics
27
Atmospheric Composition And Structure: Aerosols And Particles (0345, 4801, 4906), Atmospheric Composition And Structure: Biosphere/Atmosphere Interactions (0426, 1610), Atmospheric Composition And Structure: Troposphere: Composition And Chemistry
Scientific paper
Highly oxygenated compounds assigned to be oxidation products of α-pinene have recently been observed in substantial concentrations in ambient aerosols. Here, we confirm the unknown α-pinene tracer compound with molecular weight (MW) 204 as the C8-tricarboxylic acid 3-methyl-1,2,3-butanetricarboxylic acid. Its gas and liquid chromatographic behaviors and its mass spectral characteristics in electron ionization and negative ion electrospray ionization perfectly agree with those of a synthesized reference compound. The formation of this compound is explained by further reaction of cis-pinonic acid involving participation of the OH radical. This study illustrates that complex, multi-generation chemistry holds for the photooxidation of α-pinene in the presence of NOx.
Blockhuys Frank
Claeys Magda
Edney Edward O.
Gómez-González Yadian
Jaoui Mohammed
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