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Updated: Jun 5, 2026

Photoelectron Imaging of Anions Illustrated by 310 Nm Detachment of F−
Published on: July 27, 2018
Guiding electron emissions by excess negative charges in multiply charged molecular anions
Chuan-Gang Ning1, Phuong Diem Dau, Lai-Sheng Wang
1Department of Chemistry, Brown University, Providence, Rhode Island 02912, USA.
Abstract:
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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