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Proton Transfer in Ionic Water Clusters

Authors

  • Zheng Sun Dr.,

    1. Department Chemie, Physikalische Chemie 2, Technische Universität München, Lichtenbergstrasse 4, 85747 Garching, Germany, Fax: (+49) 89-289-13416
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  • Chi-Kit Siu Dr.,

    1. Department Chemie, Physikalische Chemie 2, Technische Universität München, Lichtenbergstrasse 4, 85747 Garching, Germany, Fax: (+49) 89-289-13416
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  • O. Petru Balaj Dr.,

    1. Department Chemie, Physikalische Chemie 2, Technische Universität München, Lichtenbergstrasse 4, 85747 Garching, Germany, Fax: (+49) 89-289-13416
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  • Mirko Gruber Dipl.-Chem.,

    1. Department Chemie, Physikalische Chemie 2, Technische Universität München, Lichtenbergstrasse 4, 85747 Garching, Germany, Fax: (+49) 89-289-13416
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  • Vladimir E. Bondybey Prof. Dr.,

    1. Department Chemie, Physikalische Chemie 2, Technische Universität München, Lichtenbergstrasse 4, 85747 Garching, Germany, Fax: (+49) 89-289-13416
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  • Martin K. Beyer Priv.-Doz. Dr.

    1. Department Chemie, Physikalische Chemie 2, Technische Universität München, Lichtenbergstrasse 4, 85747 Garching, Germany, Fax: (+49) 89-289-13416
    2. Institut für Chemie, Sekr. C4, Technische Universität Berlin, Strasse des 17. Juni 135, 10623 Berlin, Germany, Fax: (+49) 30-314-21102
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  • Financial support from the Deutsche Forschungsgemeinschaft, the Fonds der Chemischen Industrie, the Alexander von Humboldt Foundation (Z.S., C.-K.S.), and the Heisenberg program of the Deutsche Forschungsgemeinschaft (M.K.B.) is gratefully acknowledged. We thank Prof. Dr. Wolfgang Domcke and Prof. Dr. Andrzej Sobolewski for helpful discussion and valuable comments.

Abstract

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How waterlike are ionic water clusters? Clusters with 10 to 100 water molecules are frequently used as model systems for reactions in aqueous solution. Concerted proton transfer, a key feature of liquid water, can be probed by observing the formation of HDO when D2O is used as a reactant (see scheme). Mass spectrometry shows that proton transfer occurs in H(H2O)n+, whereas the individual water molecules stay intact in (H2O)n and O2(H2O)n.

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