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  Optical Fluorescence Detected from X-ray Irradiated Liquid Water

Hans, A., Ozga, C., Seidel, R., Schmidt, P., Ueltzhöffer, T., Holzapfel, X., et al. (2017). Optical Fluorescence Detected from X-ray Irradiated Liquid Water. The Journal of Physical Chemistry B, 121(10), 2326-2330. doi:10.1021/acs.jpcb.7b00096.

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 Creators:
Hans, Andreas1, Author
Ozga, Christian1, Author
Seidel, Robert2, Author
Schmidt, Philipp1, Author
Ueltzhöffer, Timo1, Author
Holzapfel, Xaver1, Author
Wenzel, Philip1, Author
Reiß, Philipp1, Author
Pohl, Marvin Nicolas2, 3, 4, Author              
Unger, Isaak5, Author
Aziz, Emad F.2, 3, 6, Author
Ehresmann, Arno1, Author
Slavíček, Petr7, Author
Winter, Bernd2, 4, Author              
Knie, André1, Author
Affiliations:
1University of Kassel and Center for Interdisciplinary Nanostructure Science and Technology (CINSaT), Heinrich-Plett-Strasse 40, D-34132 Kassel, Germany, ou_persistent22              
2Helmholtz-Zentrum Berlin für Materialien und Energie, Methods for Material Development, Albert-Einstein-Strasse 15, D-12489 Berlin, Germany, ou_persistent22              
3Department of Physics, Free University Berlin, Arnimallee 14, D-14195 Berlin, Germany, ou_persistent22              
4Molecular Physics, Fritz Haber Institute, Max Planck Society, ou_634545              
5Department of Physics and Astronomy, Uppsala University, Box 516, SE-75120 Uppsala, Sweden, ou_persistent22              
6School of Chemistry, Monash University, Clayton Campus, Victoria 3800, Australia, ou_persistent22              
7Department of Physical Chemistry, University of Chemistry and Technology Prague, Technická 5, 16628 Prague, Czech Republic, ou_persistent22              

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 Abstract: Despite its importance, the structure and dynamics of liquid water are still poorly understood in many apsects. Here, we report on the observation of optical fluorescence upon soft X-ray irradiation of liquid water. Detection of spectrally resolved fluorescence was achieved by a combination of the liquid microjet technique and fluorescence spectroscopy. We observe a genuine liquid-phase fluorescence manifested by a broad emission band in the 170–340 nm (4–7 eV) photon wavelength range. In addition, another narrower emission near 300 nm can be assigned to the fluorescence of OH (A state) in the gas phase, the emitting species being formed by Auger electrons escaping from liquid water. We argue that the newly observed broad-band emission of liquid water is relevant in search of extraterrestrial life, and we also envision the observed electron-ejection mechanism to find application for exploring solutes at liquid–vapor interfaces.

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Language(s): eng - English
 Dates: 2017-01-042017-02-102017-03-16
 Publication Status: Published in print
 Pages: 5
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1021/acs.jpcb.7b00096
 Degree: -

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Title: The Journal of Physical Chemistry B
  Other : J. Phys. Chem. B
Source Genre: Journal
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Publ. Info: Washington, D.C. : American Chemical Society
Pages: - Volume / Issue: 121 (10) Sequence Number: - Start / End Page: 2326 - 2330 Identifier: ISSN: 1520-6106
CoNE: https://pure.mpg.de/cone/journals/resource/1000000000293370_1