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Seminar: 'Towards imaging chemical dynamics with cold and controlled molecules' (Lecture)

Date
Thursday 21 June 2018Add to my calendar
Time
from 10:00
Location
HG00.616
Speaker
Dr. Daniel Horke, Controlled Molecule Imaging Group, Centre for Free-Electron Laser Science (CFEL), Deutsches Elektronen-Synchrotron (DESY)
Description

Daniel HorkeTime-resolved photoelectron spectroscopy is a powerful tool for studying ultrafast dynamics in molecular systems and allows the observation of both electronic and nuclear dynamics. I will show how it can be used to directly follow elementary chemical processes, such as charge stabilisation or excited-state proton transfer. These experiments show that very small changes in molecular structure - such as the addition of a single hydrogen bond - can make significant changes to the outcome of a photochemical process. To study these dynamics thus requires systems in well-defined initial states. Such samples can be created using electrostatic control techniques and I will show recent advances - from small systems such as water, where we can produce single-quantum-state samples, to large biological systems such as peptides, where we can select single conformations. Finally, I will outline the path forward towards studying chemical dynamics and the details of the structure-function relationship using controlled molecules, as well as present new approaches for pushing ultrafast chemical dynamics beyond photochemistry.

Contact
prof. Alex Khajetoorians & prof. Bas van de Meerakker