Guiding electron emissions by excess negative charges in multiply charged molecular anions.

Phys Rev Lett

Department of Chemistry, Brown University, Providence, Rhode Island 02912, USA.

Published: December 2010

Using photoelectron imaging, we show the effects of excess negative charges on the directions of outgoing electrons in multiply charged anions. Photoemissions are observed to occur either in a perpendicular or parallel direction, depending on the molecular configurations and origins of the detached electrons. Detachment of the π electrons from biphenyl-disulfonate dianions is shown to occur in a perpendicular direction due to the Coulomb repulsion from the two terminal charges, whereas detachment from the sulfonate groups in linear aliphatic disulfonates occurs in parallel directions.

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http://dx.doi.org/10.1103/PhysRevLett.105.263001DOI Listing

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