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@ARTICLE{Johny:451915,
      author       = {Johny, Melby and Schouder, Constant A. and Al-Refaie, Ahmed
                      and He, Lanhai and Wiese, Joss and Stapelfeldt, Henrik and
                      Trippel, Sebastian and Küpper, Jochen},
      title        = {{W}ater is a radiation protection agent for ionised
                      pyrrole},
      reportid     = {PUBDB-2020-04386, arXiv:2010.00453},
      year         = {2020},
      abstract     = {Radiation-induced damage of biological matter is an
                      ubiquitous problem in nature. The influence of the hydration
                      environment is widely discussed, but its exact role remains
                      elusive. We present the experimental observation of a
                      hydrogen-bonded water molecule acting as a radiation
                      protection agent for ionized pyrrole, a prototypical
                      aromatic biomolecule. Pure samples of pyrrole and
                      pyrrole(H$_2$O) were outer-valence ionized and the
                      subsequent damage and relaxation processes were studied.
                      Bare pyrrole fragmented through the breaking of the C-C or
                      N-C covalent bonds. However, for pyrrole(H$_2$O), we
                      observed a strong protection of the pyrrole ring through the
                      dissociative release of neutral water or by transferring an
                      electron or proton across the hydrogen bond. Furthermore,
                      for pyrrole(H$_2$O) a smaller probability for double
                      ionization was observed. Overall, a single water molecule
                      strongly reduces the fragmentation probability and thus the
                      persistent radiation damage of ionized pyrrole.},
      cin          = {FS-CFEL-CMI / FS-CFEL-1 / UNI/CUI / UNI/EXP},
      cid          = {I:(DE-H253)FS-CFEL-CMI-20220405 /
                      I:(DE-H253)FS-CFEL-1-20120731 /
                      $I:(DE-H253)UNI_CUI-20121230$ /
                      $I:(DE-H253)UNI_EXP-20120731$},
      pnm          = {6211 - Extreme States of Matter: From Cold Ions to Hot
                      Plasmas (POF3-621) / MEDEA - Molecular Electron Dynamics
                      investigated by IntensE Fields and Attosecond Pulses
                      (641789) / COMOTION - Controlling the Motion of Complex
                      Molecules and Particles (614507) / DFG project 390715994 -
                      EXC 2056: CUI: Advanced Imaging of Matter (390715994) /
                      Ex-Net-0002-Phase2-3 - Advanced Imaging of Matter:
                      Structure, Dynamics and Control on the Atomic Scale - AIM
                      $(2018_Ex-Net-0002-Phase2-3)$ / DFG project 194651731 - EXC
                      1074: Hamburger Zentrum für ultraschnelle Beobachtung
                      (CUI): Struktur, Dynamik und Kontrolle von Materie auf
                      atomarer Skala (194651731)},
      pid          = {G:(DE-HGF)POF3-6211 / G:(EU-Grant)641789 /
                      G:(EU-Grant)614507 / G:(GEPRIS)390715994 /
                      $G:(DE-HGF)2018_Ex-Net-0002-Phase2-3$ / G:(GEPRIS)194651731},
      experiment   = {EXP:(DE-H253)CFEL-Exp-20150101},
      typ          = {PUB:(DE-HGF)25},
      eprint       = {2010.00453},
      howpublished = {arXiv:2010.00453},
      archivePrefix = {arXiv},
      SLACcitation = {$\%\%CITATION$ = $arXiv:2010.00453;\%\%$},
      doi          = {10.3204/PUBDB-2020-04386},
      url          = {https://bib-pubdb1.desy.de/record/451915},
}