Journal article · Preprint article
Femtosecond X-Ray Scattering Study of Ultrafast Photoinduced Structural Dynamics in Solvated [Co(terpy)2]2+
Department of Physics, Technical University of Denmark1
Neutrons and X-rays for Materials Physics, Department of Physics, Technical University of Denmark2
Computational Atomic-scale Materials Design, Department of Physics, Technical University of Denmark3
Department of Chemistry, Technical University of Denmark4
Lund University5
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.
Language: | English |
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Publisher: | American Physical Society |
Year: | 2016 |
Pages: | 013002 |
ISBN: | 0877155453 , 9780877155454 , 0262026902 , 0262322129 , 9780262026901 and 9780262322126 |
ISSN: | 10797114 and 00319007 |
Types: | Journal article and Preprint article |
DOI: | 10.1103/PhysRevLett.117.013002 |
ORCIDs: | Biasin, Elisa , Kjær, Kasper Skov , Dohn, Asmus Ougaard , Pápai, Mátyás Imre , Møller, Klaus Braagaard , Nielsen, Martin Meedom and Haldrup, Kristoffer |