scholarly journals Determination of Excited State Molecular Structures from Time-Resolved Gas-Phase X-Ray Scattering

2020 ◽  
Author(s):  
Haiwang Yong ◽  
Andrés Moreno Carrascosa ◽  
Lingyu Ma ◽  
Brian Stankus ◽  
Michael P Minitti ◽  
...  
Keyword(s):  
Excited State ◽  
Gas Phase ◽  
Electronic States ◽  
Molecular Structures ◽  
Excited Electronic States ◽  
Comprehensive Investigation ◽  
Time Resolved ◽  
X Ray ◽  
X Ray Scattering

We present a comprehensive investigation of a recently introduced method to determine transient structures of molecules in excited electronic states with sub-Ångstrom resolution from time-resolved gas-phase scattering signals. The method,...

Time-Resolved X-ray Scattering of an Electronically Excited State in Solution. Structure of the3A2uState of Tetrakis-μ-pyrophosphitodiplatinate(II)

2009 ◽  
Vol 131 (2) ◽  
pp. 502-508 ◽  
Author(s):  
Morten Christensen ◽  
Kristoffer Haldrup ◽  
Klaus Bechgaard ◽  
Robert Feidenhans’l ◽  
Qingyu Kong ◽  
...  
Keyword(s):  
Excited State ◽  
Solution Structure ◽  
Time Resolved ◽  
X Ray ◽  
Electronically Excited State ◽  
X Ray Scattering ◽  
Electronically Excited ◽  
Ray Scattering

Structure of a short-lived excited state trinuclear Ag–Pt–Pt complex in aqueous solution by time resolved X-ray scattering

2010 ◽  
Vol 12 (26) ◽  
pp. 6921 ◽  
Author(s):  
Morten Christensen ◽  
Kristoffer Haldrup ◽  
Kasper S. Kjær ◽  
Marco Cammarata ◽  
Michael Wulff ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Excited State ◽  
Time Resolved ◽  
X Ray ◽  
Pt Complex ◽  
X Ray Scattering ◽  
Ray Scattering

Photolysis of Br2in CCl4studied by time-resolved X-ray scattering

2010 ◽  
Vol 66 (2) ◽  
pp. 252-260 ◽  
Author(s):  
Qingyu Kong ◽  
Jae Hyuk Lee ◽  
Manuela Lo Russo ◽  
Tae Kyu Kim ◽  
Maciej Lorenc ◽  
...  
Keyword(s):  
Excited State ◽  
Laser Beam ◽  
Temperature Rise ◽  
High Fidelity ◽  
Time Resolved ◽  
Adiabatic Temperature Rise ◽  
X Ray ◽  
X Ray Scattering ◽  
Simple Chemical ◽  
Scattering Study

A time-resolved X-ray solution scattering study of bromine molecules in CCl4is presented as an example of how to track atomic motions in a simple chemical reaction. The structures of the photoproducts are tracked during the recombination process, geminate and non-geminate, from 100 ps to 10 µs after dissociation. The relaxation of hot Br2*molecules heats the solvent. At early times, from 0.1 to 10 ns, an adiabatic temperature rise is observed, which leads to a pressure gradient that forces the sample to expand. The expansion starts after about 10 ns with the laser beam sizes used here. When thermal artefacts are removed by suitable scaling of the transient solvent response, the excited-state solute structures can be obtained with high fidelity. The analysis shows that 30% of Br2*molecules recombine directly along theXpotential, 60% are trapped in theA/A′ state with a lifetime of 5.5 ns, and 10% recombine non-geminatelyviadiffusive motion in about 25 ns. The Br—Br distance distribution in theA/A′ state peaks at 3.0 Å.

scholarly journals On the possibility of the Observation of Intramolecular Reaction Dynamics in Liquids by Time-resolved X-ray Scattering

2002 ◽  
Vol 216 (5) ◽  
Author(s):  
S. Techert ◽  
S. Schmatz
Keyword(s):  
Gas Phase ◽  
Free Electron Laser ◽  
Structural Changes ◽  
Reaction Dynamics ◽  
Structural Studies ◽  
X Ray Diffraction ◽  
Time Resolved ◽  
X Ray ◽  
X Ray Scattering ◽  
Trans Stilbene

The feasibility of time-resolved structural studies using pulsed X-ray radiation from a 3rd generation synchrotron is discussed and compared with scattering experiments which might be possible with a future free electron laser (X-FEL). As an example, it is shown that the structural changes during the isomerisation process of trans-stilbene into cis-stilbene can be observed using time-resolved X-ray diffraction in the gas-phase as well as in solution.

scholarly journals Anisotropy enhanced X-ray scattering from solvated transition metal complexes

2018 ◽  
Vol 25 (2) ◽  
pp. 306-315 ◽  
Author(s):  
Elisa Biasin ◽  
Tim B. van Driel ◽  
Gianluca Levi ◽  
Mads G. Laursen ◽  
Asmus O. Dohn ◽  
...  
Keyword(s):  
Structural Changes ◽  
Platinum Complex ◽  
Anisotropic Scattering ◽  
Isotropic Scattering ◽  
Time Resolved ◽  
Instrument Response Function ◽  
X Ray ◽  
X Ray Scattering ◽  
Ray Scattering

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 transient response of the solvent can enable the determination of key experimental parameters such as the instrument response function.

MagneDyn: the beamline for magneto dynamics studies at FERMI

2016 ◽  
Vol 23 (1) ◽  
pp. 98-105 ◽  
Author(s):  
Cristian Svetina ◽  
Nicola Mahne ◽  
Lorenzo Raimondi ◽  
Antonio Caretta ◽  
Barbara Casarin ◽  
...  
Keyword(s):  
Delay Line ◽  
Electronic States ◽  
High Energy ◽  
Spectroscopy Technique ◽  
Time Resolved ◽  
X Ray ◽  
X Ray Scattering ◽  
On Line ◽  
Energy Spectrometer ◽  
X Ray Absorption

The future Magneto Dynamics (MagneDyn) beamline will be devoted to study the electronic states and the local magnetic properties of excited and transient states of complex systems by means of the time-resolved X-ray absorption spectroscopy technique. The beamline will use FERMI's high-energy source covering the wavelength range from 60 nm down to 1.3 nm. An on-line photon energy spectrometer will allow spectra to be measured with high resolution while delivering most of the beam to the end-stations. Downstream the beam will be possibly split and delayed, by means of a delay line, and then focused with a set of active Kirkpatrick–Baez mirrors. These mirrors will be able to focus the radiation in one of the two MagneDyn experimental chambers: the electromagnet end-station and the resonant inelastic X-ray scattering end-station. After an introduction of the MagneDyn scientific case, the layout will be discussed showing the expected performances of the beamline.

scholarly journals Characterizing dissociative motion in time-resolved x-ray scattering from gas-phase diatomic molecules

2019 ◽  
Vol 100 (3) ◽  
Author(s):  
Matthew R. Ware ◽  
James M. Glownia ◽  
Noor Al-Sayyad ◽  
Jordan T. O'Neal ◽  
Philip H. Bucksbaum
Keyword(s):  
Gas Phase ◽  
Diatomic Molecules ◽  
Time Resolved ◽  
X Ray ◽  
X Ray Scattering ◽  
Ray Scattering

scholarly journals Time-resolved X-ray scattering of an electronically excited state in metal complexes in solution

2008 ◽  
Vol 64 (a1) ◽  
pp. C140-C140
Author(s):  
M.M. Nielsen ◽  
M. Christensen ◽  
K. Haldrup ◽  
N. Harrit ◽  
R. Feidenhans'l ◽  
...  
Keyword(s):  
Excited State ◽  
Metal Complexes ◽  
Time Resolved ◽  
X Ray ◽  
Electronically Excited State ◽  
X Ray Scattering ◽  
Electronically Excited ◽  
Ray Scattering

Determination of nanoscale heat conductivity by time-resolved X-ray scattering

2013 ◽  
Vol 541 ◽  
pp. 28-31 ◽  
Author(s):  
Daniel Issenmann ◽  
Nadine Wehmeier ◽  
Soizic Eon ◽  
Hartmut Bracht ◽  
Gernot Buth ◽  
...  
Keyword(s):  
Heat Conductivity ◽  
Time Resolved ◽  
X Ray ◽  
X Ray Scattering ◽  
Ray Scattering
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