Femtosecond x-ray scattering study of ultrafast photoinduced structural dynamics in solvated [Co(terpy)2]2+

Biasin, Elisa; van Driel, Tim Brandt; Kjær, Kasper S.; Dohn, Asmus O.; Christensen, Morten; Harlang, Tobias; Chabera, Pavel; Liu, Yizhu; Uhlig, Jens; Papai, Matyas; Nemeth, Zoltan; Hartsock, Robert; Liang, Winnie; Zhang, Jianxin; Alonso-Mori, Roberto; Chollet, Matthieu; Glownia, James M.; Nelson, Silke; Sokaras, Dimosthenis; Assefa, Tadesse A.; Britz, Alexander; Galler, Andreas; Gawelda, Wojciech; Bressler, Christian; Gaffney, Kelly J.; Lemke, Henrik T.; Moller, Klaus B.; Nielsen, Martin M.; Sundstrom, Villy; Vanko, Gyorgy; Warnmark, Kenneth; Canton, Sophie E.; Haldrup, Kristoffer

doi:10.1103/PhysRevLett.117.013002

Title: Femtosecond x-ray scattering study of ultrafast photoinduced structural dynamics in solvated $[Co (terpy)_{2}]^{2 +}$

Journal Article · Thu Jun 30 00:00:00 EDT 2016 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.117.013002· OSTI ID:1335954

Biasin, Elisa ^[1]; van Driel, Tim Brandt ^[1]; Kjær, Kasper S. ^[2]; Dohn, Asmus O. ^[1]; Christensen, Morten ^[1]; Harlang, Tobias ^[3]; Chabera, Pavel ^[3]; Liu, Yizhu ^[3]; Uhlig, Jens ^[3]; Papai, Matyas ^[4]; Nemeth, Zoltan ^[5]; Hartsock, Robert ^[6]; Liang, Winnie ^[6]; Zhang, Jianxin ^[7]; Alonso-Mori, Roberto ^[6]; Chollet, Matthieu ^[6]; Glownia, James M. ^[6]; Nelson, Silke ^[6]; Sokaras, Dimosthenis ^[6]; Assefa, Tadesse A. ^[8] more »

Technical Univ. of Denmark, Lyngby (Denmark)
Technical Univ. of Denmark, Lyngby (Denmark); Lund Univ., Lund (Sweden); SLAC National Accelerator Lab., Menlo Park, CA (United States)
Lund Univ., Lund (Sweden)
Technical Univ. of Denmark, Lyngby (Denmark): Hungarian Academy Sciences, Budapest (Hungary)
Hungarian Academy Sciences, Budapest (Hungary)
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Tianjin Polytechnic Univ., Tianjin (China)
European XFEL GmbH, Hamburg (Germany)
European XFEL GmbH, Hamburg (Germany); Jan Kochanowski Univ., Kielce (Poland)
SLAC National Accelerator Lab., Menlo Park, CA (United States); Paul Scherrer Inst. (PSI), Villigen (Switzerland)
Max Planck Institute for Biophysical Chemistry, Goettingen (Germany); Deutsches Elektronen-Synchrotron (DESY), Hamburg (Germany)

Here, we study the structural dynamics of photoexcited [Co(terpy)₂]²⁺ in an aqueous solution with ultrafast x-ray diffuse scattering experiments conducted at the Linac Coherent Light Source. Through direct comparisons with density functional theory calculations, our analysis shows that the photoexcitation event leads to elongation of the Co-N bonds, followed by coherent Co-N bond length oscillations arising from the impulsive excitation of a vibrational mode dominated by the symmetrical stretch of all six Co-N bonds. This mode has a period of 0.33 ps and decays on a subpicosecond time scale. We find that the equilibrium bond-elongated structure of the high spin state is established on a single-picosecond time scale and that this state has a lifetime of ~7 ps.

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Research Organization:: SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES)

Grant/Contract Number:: StG-259709; K29724; LP2013-59; 21302138; AC02-76SF00515; 20130504

OSTI ID:: 1335954

Alternate ID(s):: OSTI ID: 1259990

Journal Information:: Physical Review Letters, Vol. 117, Issue 1; ISSN 0031-9007

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 83 works

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