Femtosecond X-ray Absorption Spectroscopy at a Hard X-ray Free Electron Laser: Application to Spin Crossover Dynamics

Research output: Contribution to journalJournal article – Annual report year: 2013Researchpeer-review

  • Author: Lemke, Henrik T.

    SLAC National Accelerator Laboratory, United States

  • Author: Bressler, Christian

    European XFEL, Germany

  • Author: Chen, Lin X.

    Argonne National Laboratory, United States

  • Author: Fritz, David M.

    SLAC National Accelerator Laboratory, United States

  • Author: Gaffney, Kelly J.

    SLAC National Accelerator Laboratory, United States

  • Author: Galler, Andreas

    European XFEL, Germany

  • Author: Gawelda, Wojciech

    European XFEL, Germany

  • Author: Haldrup, Martin Kristoffer

    Neutrons and X-rays for Materials Physics, Department of Physics, Technical University of Denmark, Fysikvej, 2800, Kgs. Lyngby, Denmark

  • Author: Hartsock, Robert W.

    SLAC National Accelerator Laboratory, United States

  • Author: Ihee, Hyotcherl

    Korea Basic Science Institute, Korea, Republic of

  • Author: Kim, Jeongho

    Inha University, Korea, Republic of

  • Author: Kim, Kyung Hwan

    Korea Basic Science Institute, Korea, Republic of

  • Author: Lee, Jae Hyuk

    Korea Advanced Institute of Science and Technology, Korea, Republic of

  • Author: Nielsen, Martin Meedom

    Neutrons and X-rays for Materials Physics, Department of Physics, Technical University of Denmark, Fysikvej, 2800, Kgs. Lyngby, Denmark

  • Author: Stickrath, Andrew B.

    Argonne National Laboratory, United States

  • Author: Zhang, Wenkai

    SLAC National Accelerator Laboratory, United States

  • Author: Zhu, Diling

    SLAC National Accelerator Laboratory, United States

  • Author: Cammarata, Marco

    SLAC National Accelerator Laboratory, United States

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X-ray free electron lasers (XFELs) deliver short (<100 fs) and intense (similar to 10(12) photons) pulses of hard X-rays, making them excellent sources for time-resolved studies. Here we show that, despite the inherent instabilities of current (SASE based) XFELs, they can be used for measuring high-quality X-ray absorption data and we report femtosecond time-resolved X-ray absorption near-edge spectroscopy (XANES) measurements of a spin-crossover system, iron(II) tris(2,2'-bipyridine) in water. The data indicate that the low-spin to high-spin transition can be modeled by single-exponential kinetics convoluted with the overall time resolution. The resulting time constant is similar to 160 fs.
Original languageEnglish
JournalJournal of Physical Chemistry A
Volume117
Issue number4
Pages (from-to)735-740
ISSN1089-5639
DOIs
Publication statusPublished - 2013
CitationsWeb of Science® Times Cited: No match on DOI

ID: 58073948