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Journal Article

Identification of absolute geometries of cis and trans molecular isomers by Coulomb explosion imaging.

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Rolles,  D.
Research Group of Structural Dynamics of (Bio)Chemical Systems, MPI for Biophysical Chemistry, Max Planck Society;

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Citation

Ablikim, U., Bomme, C., Xiong, H., Savelyev, E., Obaid, R., Kaderiya, B., et al. (2016). Identification of absolute geometries of cis and trans molecular isomers by Coulomb explosion imaging. Scientific Reports, 6: 38202. doi:10.1038/srep38202.


Cite as: http://hdl.handle.net/11858/00-001M-0000-002C-60D0-1
Abstract
An experimental route to identify and separate geometric isomers by means of coincident Coulomb explosion imaging is presented, allowing isomer-resolved photoionization studies on isomerically mixed samples. We demonstrate the technique on cis/trans 1,2-dibromoethene (C2H2Br2). The momentum correlation between the bromine ions in a three-body fragmentation process induced by bromine 3d inner-shell photoionization is used to identify the cis and trans structures of the isomers. The experimentally determined momentum correlations and the isomer-resolved fragment-ion kinetic energies are matched closely by a classical Coulomb explosion model.