% IMPORTANT: The following is UTF-8 encoded. This means that in the presence
% of non-ASCII characters, it will not work with BibTeX 0.99 or older.
% Instead, you should use an up-to-date BibTeX implementation like “bibtex8” or
% “biber”.
@ARTICLE{Wu:894237,
author = {Wu, Rongrong and Vereecken, Luc and Tsiligiannis,
Epameinondas and Kang, Sungah and Albrecht, Sascha R. and
Hantschke, Luisa and Zhao, Defeng and Novelli, Anna and
Fuchs, Hendrik and Tillmann, Ralf and Hohaus, Thorsten and
Carlsson, Philip T. M. and Shenolikar, Justin and Bernard,
François and Crowley, John N. and Fry, Juliane L. and
Brownwood, Bellamy and Thornton, Joel A. and Brown, Steven
S. and Kiendler-Scharr, Astrid and Wahner, Andreas and
Hallquist, Mattias and Mentel, Thomas F.},
title = {{M}olecular composition and volatility of multi-generation
products formed from isoprene oxidation by nitrate radical},
journal = {Atmospheric chemistry and physics},
volume = {21},
number = {13},
issn = {1680-7324},
address = {Katlenburg-Lindau},
publisher = {EGU},
reportid = {FZJ-2021-03117},
pages = {10799 - 10824},
year = {2021},
abstract = {Isoprene oxidation by nitrate radical (NO3) is a
potentially important source of secondary organic aerosol
(SOA). It is suggested that the second or later-generation
products are the more substantial contributors to SOA.
However, there are few studies investigating the
multi-generation chemistry of isoprene-NO3 reaction, and
information about the volatility of different isoprene
nitrates, which is essential to evaluate their potential to
form SOA and determine their atmospheric fate, is rare. In
this work, we studied the reaction between isoprene and NO3
in the SAPHIR chamber (Jülich) under near-atmospheric
conditions. Various oxidation products were measured by a
high-resolution time-of-flight chemical ionization mass
spectrometer using Br− as the reagent ion. Most of the
products detected are organic nitrates, and they are grouped
into monomers (C4 and C5 products) and dimers (C10 products)
with 1–3 nitrate groups according to their chemical
composition. Most of the observed products match expected
termination products observed in previous studies, but some
compounds such as monomers and dimers with three nitrogen
atoms were rarely reported in the literature as gas-phase
products from isoprene oxidation by NO3. Possible formation
mechanisms for these compounds are proposed. The
multi-generation chemistry of isoprene and NO3 is
characterized by taking advantage of the time behavior of
different products. In addition, the vapor pressures of
diverse isoprene nitrates are calculated by different
parametrization methods. An estimation of the vapor pressure
is also derived from their condensation behavior. According
to our results, isoprene monomers belong to
intermediate-volatility or semi-volatile organic compounds
and thus have little effect on SOA formation. In contrast,
the dimers are expected to have low or extremely low
volatility, indicating that they are potentially substantial
contributors to SOA. However, the monomers constitute
$80 \%$ of the total explained signals on average, while
the dimers contribute less than $2 \%,$ suggesting that
the contribution of isoprene NO3 oxidation to SOA by
condensation should be low under atmospheric conditions. We
expect a SOA mass yield of about $5 \%$ from the
wall-loss- and dilution-corrected mass concentrations,
assuming that all of the isoprene dimers in the low- or
extremely low-volatility organic compound (LVOC or ELVOC)
range will condense completely.},
cin = {IEK-8},
ddc = {550},
cid = {I:(DE-Juel1)IEK-8-20101013},
pnm = {2111 - Air Quality (POF4-211)},
pid = {G:(DE-HGF)POF4-2111},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000674782200002},
doi = {10.5194/acp-21-10799-2021},
url = {https://juser.fz-juelich.de/record/894237},
}