Control and femtosecond time-resolved imaging of torsion in a chiral molecule

dc.citation.doi10.1063/1.4719816
dc.citation.issn0021-9606
dc.citation.issue20
dc.citation.jtitleThe Journal of Chemical Physics
dc.citation.volume136
dc.contributor.authorHansen, Jonas L.
dc.contributor.authorNielsen, Jens H.
dc.contributor.authorMadsen, Christian Bruun
dc.contributor.authorLindhardt, Anders Thyboe
dc.contributor.authorJohansson, Mikael P.
dc.contributor.authorSkrydstrup, Troels
dc.contributor.authorMadsen, Lars Bojer
dc.contributor.authorStapelfeldt, Henrik
dc.date.accessioned2023-12-07T22:11:28Z
dc.date.available2023-12-07T22:11:28Z
dc.date.issued2012-05-29
dc.date.published2012-05-29
dc.description.abstractWe study how the combination of long and short laser pulses can be used to induce torsion in an axially chiral biphenyl derivative (3,5-difluoro-3′,5′-dibromo-4′-cyanobiphenyl). A long, with respect to the molecular rotational periods, elliptically polarized laser pulse produces 3D alignment of the molecules, and a linearly polarized short pulse initiates torsion about the stereogenic axis. The torsional motion is monitored in real-time by measuring the dihedral angle using femtosecond time-resolved Coulomb explosion imaging. Within the first 4 picoseconds (ps), torsion occurs with a period of 1.25 ps and an amplitude of 3° in excellent agreement with theoretical calculations. At larger times, the quantum states of the molecules describing the torsional motion dephase and an almost isotropic distribution of the dihedral angle is measured. We demonstrate an original application of covariance analysis of two-dimensional ion images to reveal strong correlations between specific ejected ionic fragments from Coulomb explosion. This technique strengthens our interpretation of the experimental data.
dc.identifier.urihttps://hdl.handle.net/2097/43869
dc.relation.urihttps://doi.org/10.1063/1.4719816
dc.rightsThis article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. This article appeared in [Control and femtosecond time-resolved imaging of torsion in a chiral molecule. The Journal of Chemical
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/
dc.rights.urihttp://web.archive.org/web/20180624131647/https://publishing.aip.org/authors/web-posting-guidelines
dc.titleControl and femtosecond time-resolved imaging of torsion in a chiral molecule
dc.typeText

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