Anisotropy enhanced X-ray scattering from solvated transition metal complexes

Journal of Synchrotron Radiation
Elisa BiasinM M Nielsen

Abstract

Time-resolved X-ray scattering patterns from photoexcited molecules in solution are in many cases anisotropic at the ultrafast time scales accessible at X-ray free-electron lasers (XFELs). This anisotropy arises from the interaction of a linearly polarized UV-Vis pump laser pulse with the sample, which induces anisotropic structural changes that can be captured by femtosecond X-ray pulses. In this work, a method for quantitative analysis of the anisotropic scattering signal arising from an ensemble of molecules is described, and it is demonstrated how its use can enhance the structural sensitivity of the time-resolved X-ray scattering experiment. This method is applied on time-resolved X-ray scattering patterns measured upon photoexcitation of a solvated di-platinum complex at an XFEL, and the key parameters involved are explored. It is shown that a combined analysis of the anisotropic and isotropic difference scattering signals in this experiment allows a more precise determination of the main photoinduced structural change in the solute, i.e. the change in Pt-Pt bond length, and yields more information on the excitation channels than the analysis of the isotropic scattering only. Finally, it is discussed how the anisotropic t...Continue Reading

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Citations

Aug 24, 2019·Physical Chemistry Chemical Physics : PCCP·Alexander BritzRoberto Alonso-Mori
Sep 16, 2019·The Journal of Chemical Physics·Mátyás PápaiKlaus B Møller
May 10, 2020·Journal of Synchrotron Radiation·Jungmin KimHyotcherl Ihee
Feb 11, 2021·Faraday Discussions·Adi NatanPhilip H Bucksbaum
Aug 7, 2021·Nature Communications·Eun Hyuk ChoiHyotcherl Ihee
Dec 19, 2019·The Journal of Physical Chemistry. B·Nicholas A MillerRoseanne J Sension
Jul 18, 2020·Inorganic Chemistry·Lars MewesMajed Chergui
Mar 7, 2020·Journal of Chemical Theory and Computation·Nikola ZotevAdam Kirrander
Aug 31, 2021·Journal of the American Chemical Society·Hosung KiJeongho Kim

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