Imaging Molecular Motion: Femtosecond X-Ray Scattering of an Electrocyclic Chemical Reaction

Michael Minitti, James Budarz, Adam Kirrander, J S Robinson, Daniel Ratner, T J Lane, D Zhu, J M Glownia, M Kozina, H T Lemke, M Sikorski, Y Feng, S Nelson, Kenichiro Saita, B. Stankus, Thomas Northey, Jerome Hastings, Peter Weber

Research output: Contribution to journalArticlepeer-review


Structural rearrangements within single molecules occur on ultrafast time scales. Many aspects of molecular dynamics, such as the energy flow through excited states, have been studied using spectroscopic techniques, yet the goal to watch molecules evolve their geometrical structure in real time remains challenging. By mapping nuclear motions using femtosecond x-ray pulses, we have created real-space representations of the evolving dynamics during a well-known chemical reaction and show a series of time-sorted structural snapshots produced by ultrafast time-resolved hard x-ray scattering. A computational analysis optimally matches the series of scattering patterns produced by the x rays to a multitude of potential reaction paths. In so doing, we have made a critical step toward the goal of viewing chemical reactions on femtosecond time scales, opening a new direction in studies of ultrafast chemical reactions in the gas phase.
Original languageEnglish
Article number255501
Number of pages5
JournalPhysical Review Letters
Issue number25
Early online date22 Jun 2015
Publication statusPublished - 26 Jun 2015


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