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Workshop on Frontiers in Ultrafast Scattering of Electrons

Aug 27 – 29, 2025
SLAC
America/Los_Angeles timezone

Session

MeV-UED Enabled Ultrafast Chemical Science in Gas and Liquid Phases

1C
Aug 27, 2025, 2:00 PM
48/1-112A/B/C/D - Redwood Rooms (SLAC)

48/1-112A/B/C/D - Redwood Rooms

SLAC

2575 Sand Hill Rd, Menlo Park CA 94025

Conveners

MeV-UED Enabled Ultrafast Chemical Science in Gas and Liquid Phases

  • Yusong Liu (SLAC)

Description

Gas and Liquid Phase Chemical Science Enabled by MeV-UED

Presentation materials

There are no materials yet.

  1. 3. Speaker Introductions and Session Overview
    Dr Yusong Liu (SLAC, LCLS)
    8/27/25, 2:00 PM

    Provide an introduction to the invited speakers and an overview of the scientific presentations in the session.

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  2. 4. Gas-phase Ultrafast Electron Diffraction: Achievements, challenges and opportunities
    Dr Pedro Nunes (Diamond Light Source, Ltd)
    8/27/25, 2:05 PM

    Gas-phase ultrafast electron diffraction (UED) has become a powerful tool for capturing molecular dynamics with femtosecond temporal and atomic spatial resolutions, enabling direct observation of phenomena such as photo-dissociation, ring-opening reactions, and nuclear wavepacket motion through conical intersections. Despite significant progress, several challenges remain: temporal resolution...

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  3. 2. Studying the UV-induced isomerization and dissociation dynamics of gas-phase oxazole and isoxazole
    Prof. Daniel Rolles (Kansas State University)
    8/27/25, 2:35 PM

    The five-member ring isomers oxazole and isoxazole (C3H3NO) are an interesting model system for studying UV-induced isomerization and dissociation since the different types of bonds in both isomers (C-N-C-O vs C-N-O-C) are predicted to lead to very different reaction products and dynamics. I will present time-resolved product yields for both isomers obtained from a recent GUED experiment and...

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  4. 6. UED Studies of the UV Photochemistry of Isolated and Solvated Bromoform
    Dr Oliver Gessner (LBNL)
    8/27/25, 3:05 PM

    Bromoform (CHBr3) is a natural compound whose UV photodissociation products contribute to ozone depletion in the Earth’s atmosphere. Ultrafast electron diffraction is used to study atomic rearrangements in isolated and in solvated bromoform molecules after 267 nm excitation. The gas phase study provides the first experimental visualization of a long-predicted ultrafast isomerization channel....

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  5. 8. Capturing Chemical Motion in Solution: Insights from Femtosecond X-ray and Electron Scattering
    Dr Elisa Biasin
    8/27/25, 3:40 PM

    Femtosecond X-ray solution scattering (XSS) has enabled us to capture photoinduced structural dynamics in solvated transition metal complexes with atomic-scale resolution, revealing intramolecular changes, vibrational coherences, and solvation dynamics. In this talk, I will present recent XSS results from the LCLS, with a particular emphasis on tracking photoinduced solute–solvent...

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  6. 7. Laser-Induced Streaking in Liquid-Phase Ultrafast Electron Diffraction
    Prof. Jie Yang (TsingHua University)
    8/27/25, 4:10 PM

    Laser-induced streaking (LIS) of electron beam, first observed by Zewail group back in 1994, is a unique phenomenon in UED that is often used to conveniently identify time-zero in UED experiments. In the gas phase, LIS originates from plasma field created by strong field ionization of sample molecules, hence named as “photoionization-induced lensing” by Zewail. Separately, LIS can also be...

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  7. 5. Gas Phase Results from MeV-UED
    Prof. Russell Minns (University of Southampton)

    To be determined

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