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@ARTICLE{Nehr:22452,
      author       = {Nehr, S. and Bohn, B. and Wahner, A.},
      title        = {{P}romt {HO}2 {F}ormation {F}ollowing the {R}eaction of
                      {OH} {A}romatic {C}ompounds under {A}tmospheric conditions},
      journal      = {The journal of physical chemistry / A},
      volume       = {116},
      number       = {24},
      issn         = {1089-5639},
      address      = {Washington, DC},
      publisher    = {Soc.},
      reportid     = {PreJuSER-22452},
      pages        = {6015 - 6026},
      year         = {2012},
      note         = {We thank M. Bachner, H. Fuchs, A. Hofzumahaus, F. Holland,
                      and S. Lou for useful discussions and technical support.
                      S.N. thanks the Deutsche Forschungsgemeinschaft for a Ph.D.
                      studentship under grant BO 1580/3-1.},
      abstract     = {The secondary formation of HO(2) radicals following OH +
                      aromatic hydrocarbon reactions in synthetic air under normal
                      pressure and temperature was investigated in the absence of
                      NO after pulsed production of OH radicals. OH and HO(x) (=OH
                      + HO(2)) decay curves were recorded using laser-induced
                      fluorescence after gas-expansion. The prompt HO(2) yields
                      (HO(2) formed without preceding NO reactions) were
                      determined by comparison to results obtained with CO as a
                      reference compound. This approach was recently introduced
                      and applied to the OH + benzene reaction and was extended
                      here for a number of monocyclic aromatic hydrocarbons. The
                      measured HO(2) formation yields are as follows: toluene,
                      0.42 ± 0.11; ethylbenzene, 0.53 ± 0.10; o-xylene, 0.41 ±
                      0.08; m-xylene, 0.27 ± 0.06; p-xylene, 0.40 ± 0.09;
                      1,2,3-trimethylbenzene, 0.31 ± 0.06;
                      1,2,4-trimethylbenzene, 0.37 ± 0.09;
                      1,3,5-trimethylbenzene, 0.29 ± 0.08; hexamethylbenzene,
                      0.32 ± 0.08; phenol, 0.89 ± 0.29; o-cresol, 0.87 ± 0.29;
                      2,5-dimethylphenol, 0.72 ± 0.12; 2,4,6-trimethylphenol,
                      0.45 ± 0.13. For the alkylbenzenes HO(2) is the proposed
                      coproduct of phenols, epoxides, and possibly oxepins formed
                      in secondary reactions with O(2). In most product studies
                      the only quantified coproducts were phenols whereas only a
                      few studies reported yields of epoxides. Oxepins have not
                      been observed so far. Together with the yields of phenols
                      from other studies, the HO(2) yields determined in this work
                      set an upper limit to the combined yields of epoxides and
                      oxepins that was found to be significant (≤0.3) for all
                      investigated alkylbenzenes except m-xylene. For the
                      hydroxybenzenes the currently proposed HO(2) coproducts are
                      dihydroxybenzenes. For phenol and o-cresol the determined
                      HO(2) yields are matching the previously reported
                      dihydroxybenzene yields, indicating that these are the only
                      HO(2) forming reaction channels. For 2,5-dimethylphenol and
                      2,4,6-trimethylphenol no complementary product studies are
                      available.},
      keywords     = {J (WoSType)},
      cin          = {IEK-8},
      ddc          = {530},
      cid          = {I:(DE-Juel1)IEK-8-20101013},
      pnm          = {Atmosphäre und Klima},
      pid          = {G:(DE-Juel1)FUEK491},
      shelfmark    = {Chemistry, Physical / Physics, Atomic, Molecular $\&$
                      Chemical},
      typ          = {PUB:(DE-HGF)16},
      pubmed       = {pmid:22195640},
      UT           = {WOS:000305444100029},
      doi          = {10.1021/jp210946y},
      url          = {https://juser.fz-juelich.de/record/22452},
}