Formation of Secondary Organic Aerosols Through Photooxidation of Isoprene

@article{Claeys2004FormationOS,
  title={Formation of Secondary Organic Aerosols Through Photooxidation of Isoprene},
  author={Magda Claeys and Bim Graham and Gyorgy Vas and Wu Wang and Reinhilde Vermeylen and V. A. Pashynska and Jan Cafmeyer and Pascal Guyon and Meinrat O. Andreae and Paulo Artaxo and Willy Maenhaut},
  journal={Science},
  year={2004},
  volume={303},
  pages={1173 - 1176}
}
Detailed organic analysis of natural aerosols from the Amazonian rain forest showed considerable quantities of previously unobserved polar organic compounds, which were identified as a mixture of two diastereoisomeric 2-methyltetrols: 2-methylthreitol and 2-methylerythritol. These polyols, which have the isoprene skeleton, can be explained by OH radical–initiated photooxidation of isoprene. They have low vapor pressure, allowing them to condense onto preexisting particles. It is estimated that… 
Formation of secondary organic aerosols from isoprene and its gas-phase oxidation products through reaction with hydrogen peroxide
Aerosols produced over forests impair visibility and may affect climate by scattering and absorbing solar radiation and by serving as cloud condensation nuclei. Here, we introduce, to our knowledge,
Global secondary organic aerosol from isoprene oxidation
[1] Inclusion of isoprene as a source of secondary organic aerosol (SOA) in a global model increases the global burden of SOA from all sources by more than a factor of two. The isoprene source
Secondary organic aerosols from anthropogenic and biogenic precursors.
TLDR
Evidence for oligomer formation for SOA from both precursors was given by an increasing abundance of compounds with a high molecular weight and by an increase thermal stability with increasing aging time.
Laboratory observation of oligomers in the aerosol from isoprene/NOx photooxidation
[1] Compounds assigned to be oxidation products of isoprene (2-methyl-1,3-butadiene) have recently been observed in ambient aerosols, suggesting that isoprene might play an important role in
Efficient Isoprene Secondary Organic Aerosol Formation from a Non-IEPOX Pathway.
TLDR
Online measurements of aerosol molecular composition show that the fate of second-generation RO2 radicals is key to understanding the efficient SOA formation and the NOx-dependent yields described here and in the literature, and suggest that a more-complex representation of NOX-dependent SOA yields may be important in models.
Isoprene forms secondary organic aerosol through cloud processing: model simulations.
TLDR
It is concluded that cloud processing of isoprene is an important contributor to SOA production, altering the global distribution of hygroscopic organic aerosol and cloud condensation nuclei.
Secondary organic aerosol formation from isoprene photooxidation.
TLDR
At high NOx, yields are found to decrease substantially with increasing [NOx], indicating the importance of RO2 chemistry in SOA formation.
Secondary organic aerosol formation from isoprene photooxidation under high‐NOx conditions
The oxidation of isoprene (2-methyl-1,3-butadiene) is known to play a central role in the photochemistry of the troposphere, but is generally not considered to lead to the formation of secondary
Evidence for a significant proportion of Secondary Organic Aerosol from isoprene above a maritime tropical forest
Abstract. Isoprene is the most abundant non-methane biogenic volatile organic compound (BVOC), but the processes governing secondary organic aerosol (SOA) formation from isoprene oxidation are only
Unexpected Epoxide Formation in the Gas-Phase Photooxidation of Isoprene
TLDR
It is reported here that under pristine conditions isoprene is oxidized primarily to hydroxyhydroperoxides, which leads efficiently to the formation of dihydroxyepoxides and OH reformation, which provides a missing link tying the gas-phase degradation of isoprenes to the observed formation of organic aerosols.
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