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

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

2009-03-25

arxiv.org/abs/0903.4463v1

J. Chem. Phys. 130, 234310 (2009)

Physics

Atomic Physics

10 pages, 9 figures, 2 tables; submitted to J. Chem. Phys.;

Scientific paper

10.1063/1.3149789

It is demonstrated that strong laser pulses can introduce torsional motion in the axially chiral molecule 3,5-diflouro-3',5'-dibromo-biphenyl (DFDBrBPh). 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 de-racemization and laser controlled molecular junctions based on molecules with torsion.

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