Identification of absolute geometries of cis and trans molecular isomers by Coulomb Explosion Imaging

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 (C(2)H(2)Br(2)). The momentum co...

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Detalles Bibliográficos
Autores principales: Ablikim, Utuq, Bomme, Cédric, Xiong, Hui, Savelyev, Evgeny, Obaid, Razib, Kaderiya, Balram, Augustin, Sven, Schnorr, Kirsten, Dumitriu, Ileana, Osipov, Timur, Bilodeau, René, Kilcoyne, David, Kumarappan, Vinod, Rudenko, Artem, Berrah, Nora, Rolles, Daniel
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group 2016
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5133590/
https://www.ncbi.nlm.nih.gov/pubmed/27910943
http://dx.doi.org/10.1038/srep38202
Descripción
Sumario: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 (C(2)H(2)Br(2)). 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.

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