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  Ultrafast isomerization initiated by X-ray core ionization.

Liekhus-Schmaltz, C. E., Tenney, I., Osipov, T., Sanchez-Gonzalez, A., Berrah, N., Boll, R., et al. (2015). Ultrafast isomerization initiated by X-ray core ionization. Nature Communications, 6: 8199. doi:10.1038/ncomms9199.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-002C-017F-C Version Permalink: http://hdl.handle.net/11858/00-001M-0000-002C-0183-F
Genre: Journal Article

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Liekhus-Schmaltz, C. E., Author
Tenney, I., Author
Osipov, T., Author
Sanchez-Gonzalez, A., Author
Berrah, N., Author
Boll, R.1, Author              
Bomme, C., Author
Bostedt, C., Author
Bozek, J. D., Author
Carron, S., Author
Coffee, R., Author
Devin, J., Author
Erk, B., Author
Ferguson, K. R., Author
Field, R. W., Author
Foucar, L., Author
Frasinski, L. J., Author
Glownia, J. M., Author
Gühr, M., Author
Kamalov, A., Author
Krzywinski, J., AuthorLi, H., AuthorMarangos, J. P., AuthorMartinez, T. J., AuthorMcFarland, B. K., AuthorMiyabe, S., AuthorMurphy, B., AuthorNatan, A., AuthorRolles, D., AuthorRudenko, A., AuthorSiano, M., AuthorSimpson, E. R., AuthorSpector, L., AuthorSwiggers, M., AuthorWalke, D., AuthorWang, S., AuthorWeber, T., AuthorBucksbaum, P. H., AuthorPetrovic, V. S., Author more..
Affiliations:
1Research Group of Structural Dynamics of (Bio)Chemical Systems, MPI for Biophysical Chemistry, Max Planck Society, ou_578564              

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 Abstract: Rapid proton migration is a key process in hydrocarbon photochemistry. Charge migration and subsequent proton motion can mitigate radiation damage when heavier atoms absorb X-rays. If rapid enough, this can improve the fidelity of diffract-before-destroy measurements of biomolecular structure at X-ray-free electron lasers. Here we study X-ray-initiated isomerization of acetylene, a model for proton dynamics in hydrocarbons. Our time-resolved measurements capture the transient motion of protons following X-ray ionization of carbon K-shell electrons. We Coulomb-explode the molecule with a second precisely delayed X-ray pulse and then record all the fragment momenta. These snapshots at different delays are combined into a ‘molecular movie’ of the evolving molecule, which shows substantial proton redistribution within the first 12 fs. We conclude that significant proton motion occurs on a timescale comparable to the Auger relaxation that refills the K-shell vacancy.

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Language(s): eng - English
 Dates: 2015-09-10
 Publication Status: Published online
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 Rev. Method: Peer
 Identifiers: DOI: 10.1038/ncomms9199
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Title: Nature Communications
Source Genre: Journal
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Pages: 7 Volume / Issue: 6 Sequence Number: 8199 Start / End Page: - Identifier: -