Imaging Intramolecular Coulomb Repulsions in Multiply Charged Anions

Journal Article · Fri Aug 22 04:00:00 EDT 2008 · Physical Review Letters, 101(8):Art. no. 083003

DOI:https://doi.org/10.1103/PhysRevLett.101.083003· OSTI ID:939593

Xing, Xiaopeng; Wang, Xue B; Wang, Lai S

Properties of multiply charged anions are dominated by the intramolecular Coulomb repulsion (ICR). Using photoelectron imaging, we show the effect of ICR on photoelectron angular distributions for a series of dianions, -O2C(CH2)nCO2 -(Dn2-). The observed photoemission band of Dn2- 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 D112- the angular distribution reverses back to peak at the perpendicular direction due to the reduced ICR.

• Research Organization: Pacific Northwest National Laboratory (PNNL), Richland, WA (US), Environmental Molecular Sciences Laboratory (EMSL)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC05-76RL01830
• OSTI ID: 939593
• Report Number(s): PNNL-SA-61560; 25395
• Journal Information: Physical Review Letters, 101(8):Art. no. 083003, Journal Name: Physical Review Letters, 101(8):Art. no. 083003 Journal Issue: 8 Vol. 101; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
ANGULAR DISTRIBUTION
ANIONS
COULOMB FIELD
ELECTRON EMISSION
EMISSION SPECTRA
Environmental Molecular Sciences Laboratory
PHOTOELECTRON SPECTROSCOPY
PHOTOEMISSION