Guiding Electron Emissions by Excess Negative Charges in Multiply Charged Molecular Anions

被引:15
|
作者
Ning, Chuan-Gang [1 ]
Dau, Phuong Diem [1 ]
Wang, Lai-Sheng [1 ]
机构
[1] Brown Univ, Dept Chem, Providence, RI 02912 USA
关键词
PHOTODETACHMENT PHOTOELECTRON-SPECTROSCOPY; REPULSIVE COULOMB BARRIER; GAS-PHASE; IONS; TETRAANIONS; STABILITY; CHEMISTRY; EXPANSION;
D O I
10.1103/PhysRevLett.105.263001
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
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 pi 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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页数:4
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