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Updated: May 11, 2026
06:53
Photoelectron Imaging of Anions Illustrated by 310 Nm Detachment of F−
Published on: July 27, 2018
High resolution photoelectron imaging of Au2(-)
Iker León1, Zheng Yang, Lai-Sheng Wang
1Department of Chemistry, Brown University, Providence, Rhode Island 02912, USA.
The Journal of Chemical Physics
|May 17, 2013
Summary
High-resolution photoelectron spectroscopy of the gold dimer anion (Au2(-)) provides accurate spectroscopic constants for Au2 and Au2(-). This study precisely measures the electron affinity of Au2 and the dissociation energy of Au2(-).
Area of Science:
- Physical Chemistry
- Atomic and Molecular Physics
- Spectroscopy
Background:
- The gold dimer anion (Au2(-)) is a molecule of interest in physical chemistry.
- Understanding its electronic structure and properties is crucial for various applications.
Purpose of the Study:
- To obtain high-resolution photoelectron spectra of Au2(-).
- To accurately determine spectroscopic constants for the ground states of Au2 and Au2(-).
- To measure the electron affinity of Au2 and the dissociation energy of Au2(-).
Main Methods:
- Utilized a newly built photoelectron imaging apparatus.
- Obtained vibrationally resolved photoelectron images for the ground state detachment transition of Au2(-).
- Employed Franck-Condon simulations for data analysis.
Main Results:
- Achieved a spectral resolution of 3 cm(-1) for low energy electrons.
- Determined accurate spectroscopic constants for Au2 and Au2(-).
- Measured the electron affinity of Au2 as 1.9393 ± 0.0006 eV.
- Obtained a precise dissociation energy for Au2(-) of 1.937 ± 0.005 eV.
Conclusions:
- The high-resolution photoelectron spectra provide valuable insights into the electronic structure of Au2(-).
- The determined spectroscopic constants and energy values are more precise than previously reported.
- This work advances the understanding of gold cluster anions.
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