@article{ReuschHolzmeierGerlachetal.2019,
  author    = {Reusch, Engelbert and Holzmeier, Fabian and Gerlach, Marius and Fischer, Ingo and Hemberger, Patrick},
  title     = {Decomposition of Picolyl Radicals at High Temperature: A Mass Selective Threshold Photoelectron Spectroscopy Study},
  series = {Chemistry - A European Journal},
  volume    = {25},
  journal   = {Chemistry - A European Journal},
  number    = {72},
  doi       = {10.1002/chem.201903937},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-208132},
  pages     = {16652-16659},
  year      = {2019},
  abstract  = {The reaction products of the picolyl radicals at high temperature were characterized by mass-selective threshold photoelectron spectroscopy in the gas phase. Aminomethylpyridines were pyrolyzed to initially produce picolyl radicals (m /z =92). At higher temperatures further thermal reaction products are generated in the pyrolysis reactor. All compounds were identified by mass-selected threshold photoelectron spectroscopy and several hitherto unexplored reactive molecules were characterized. The mechanism for several dissociation pathways was outlined in computations. The spectrum of m /z =91, resulting from hydrogen loss of picolyl, shows four isomers, two ethynyl pyrroles with adiabatic ionization energies (IE\(_{ad}\)) of 7.99 eV (2-ethynyl-1H -pyrrole) and 8.12 eV (3-ethynyl-1H -pyrrole), and two cyclopentadiene carbonitriles with IE′s of 9.14 eV (cyclopenta-1,3-diene-1-carbonitrile) and 9.25 eV (cyclopenta-1,4-diene-1-carbonitrile). A second consecutive hydrogen loss forms the cyanocyclopentadienyl radical with IE′s of 9.07 eV (T\(_0\)) and 9.21 eV (S\(_1\)). This compound dissociates further to acetylene and the cyanopropynyl radical (IE=9.35 eV). Furthermore, the cyclopentadienyl radical, penta-1,3-diyne, cyclopentadiene and propargyl were identified in the spectra. Computations indicate that dissociation of picolyl proceeds initially via a resonance-stabilized seven-membered ring.},
  language  = {en}
}
@article{SchleierReuschLummeletal.2019,
  author    = {Schleier, Domenik and Reusch, Engelbert and Lummel, Lisa and Hemberger, Patrick and Fischer, Ingo},
  title     = {Threshold photoelectron spectroscopy of IO and IOH},
  series = {ChemPhysChem},
  volume    = {20},
  journal   = {ChemPhysChem},
  number    = {19},
  doi       = {10.1002/cphc.201900813},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-204751},
  pages     = {2413-2416},
  year      = {2019},
  abstract  = {Iodine oxides appear as reactive intermediates in atmospheric chemistry. Here, we investigate IO and HOI by mass-selective threshold photoelectron spectroscopy (ms-TPES), using synchrotron radiation. IO and HOI are generated by photolyzing iodine in the presence of ozone. For both molecules, accurate ionization energies are determined, 9.71±0.02 eV for IO and 9.79±0.02 eV for HOI. The strong spin-spin interaction in the 3Σ- ground state of IO+ leads to an energy splitting into the Ω=0 and Ω=±1 sublevels. Upon ionization, the I-O bond shortens significantly in both molecules; thus, a vibrational progression, assigned to the I-O stretch, is apparent in both spectra.},
  language  = {en}
}