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Thomas Poulsen

A combined experimental and theoretical study on realizing and using laser controlled torsion of molecules

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  • Department of Physics and Astronomy
  • Interdisciplinary Nanoscience Center
  • Department of Chemistry
  • Teoretisk naturvidenskab
It is demonstrated that strong laser pulses can introduce torsional motion in the axially chiral molecule 3,5-difluoro-3',5'-dibromobiphenyl. A nanosecond laser pulse spatially aligns the stereogenic carbon-carbon (C–C) bond axis allowing a perpendicularly polarized, intense femtosecond pulse to initiate torsional motion accompanied by a rotation about the fixed axis. We monitor the induced motion by femtosecond time-resolved Coulomb explosion imaging. Our theoretical analysis corroborates the experimental findings and on the basis of these results we discuss future applications of laser-induced torsion, viz., time-resolved studies of deracemization and laser controlled molecular junctions based on molecules with torsion.
Original languageEnglish
JournalJournal of Chemical Physics
Number of pages9
Publication statusPublished - 18 Jun 2009

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