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Emerging Photon Technologies for Chemical Dynamics
Abstract:
There is fundamental interest in understanding the coupled nuclear and electronic dynamics associated with charge transfer processes in complex molecules and materials, which are often mediated by electron, electron hole or proton motion. With dramatic improvements in the techniques to generate extreme ultraviolet (XUV) and Xray femtosecond pulses, it now becomes possible to trigger and probe these kinds of processes in real time. Here we study the dynamics of an electron hole created by photoionization in the valence shell of protonated water clusters H+(H2O)n. We demonstrate that the electron hole is strongly correlated with the protons forming the
hydrogen bond network. We show that it is possible to probe key aspects of the
valence electron hole dynamics and the coupled nuclear motion with femtosecond
time resolution by resonantly exciting K-shell 1s electrons to fill the electron hole. This
represents an opportunity for X-ray transient absorption spectroscopy.
