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Imaging charge transfer in iodomethane upon x-ray photoabsorption

MPG-Autoren
http://pubman.mpdl.mpg.de/cone/persons/resource/persons95189

Schlichting,  Ilme
Department of Biomolecular Mechanisms, Max Planck Institute for Medical Research, Max Planck Society;

http://pubman.mpdl.mpg.de/cone/persons/resource/persons117794

Rolles,  Daniel
Department of Biomolecular Mechanisms, Max Planck Institute for Medical Research, Max Planck Society;

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Zitation

Erk, B., Boll, R., Trippel, S., Anielski, D., Foucar, L., Rudek, B., et al. (2014). Imaging charge transfer in iodomethane upon x-ray photoabsorption. Science, 345(6194), 288-291. doi:10.1126/science.1253607.


Zitierlink: http://hdl.handle.net/11858/00-001M-0000-0024-9827-C
Zusammenfassung
Studies of charge transfer are often hampered by difficulties in determining the charge localization at a given time. Here, we used ultrashort x-ray free-electron laser pulses to image charge rearrangement dynamics within gas-phase iodomethane molecules during dissociation induced by a synchronized near-infrared (NIR) laser pulse. Inner-shell photoionization creates positive charge, which is initially localized on the iodine atom. We map the electron transfer between the methyl and iodine fragments as a function of their interatomic separation set by the NIR-x-ray delay. We observe signatures of electron transfer for distances up to 20 angstroms and show that a realistic estimate of its effective spatial range can be obtained from a classical over-the-barrier model. The presented technique is applicable for spatiotemporal imaging of charge transfer dynamics in a wide range of molecular systems.