期刊
PHYSICAL REVIEW LETTERS
卷 101, 期 8, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.101.083003
关键词
-
资金
- U. S. Department of Energy
- Office of Basic Energy Sciences
- Chemical Science Division
- NSF
The properties of multiply charged anions are dominated by intramolecular Coulomb repulsion (ICR). Using photoelectron imaging, we show the effect of ICR on photoelectron angular distributions for a series of dianions, (-)O(2)C(CH(2))(n)CO(2)(-) (D(n)(2-)). The observed photoemission band of D(n)(2-) was due to a perpendicular transition from the charged end group. However, photoemission intensities were observed to peak along the laser polarization for smaller n due to the strong ICR that forces electrons to be emitted along the molecular axis. This emission pattern weakens with increasing n and at D(11)(2-) the angular distribution reverses back to peak at the perpendicular direction due to the reduced ICR.
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