Electronic Structure and Anion Photoelectron Spectroscopy of Uranium–Gold Clusters UAun–, n = 3–7
Journal Article
·
· Journal of Physical Chemistry. A, Molecules, Spectroscopy, Kinetics, Environment, and General Theory
- Johns Hopkins University, Baltimore, MD (United States); The Johns Hopkins Universty
- Johns Hopkins University, Baltimore, MD (United States)
- Virginia Commonwealth University, Richmond, VA (United States)
- Washington State University, Pullman, WA (United States)
A collaborative effort between experiment and theory towards elucidating the electronic and molecular structures of uranium-gold clusters is presented. Anion photoelectron spectra of UAun–(n=3-7) were taken at third (355 nm) and fourth (266 nm) harmonics of a Nd:YAG laser, as well as excimer (ArF 193nm) photon energies, where the experimental adiabatic electron affinities (AEA) and vertical detachment energies (VDE) values were measured. Complementary first principles calculations were subsequently carried out to corroborate experimentally determined electron detachment energies and to determine the geometry and electronic structure for each cluster. Except for the ring-like neutral isomer of UAu6 where one unpaired electron is spread over the Au atoms, all other neutral and anionic UAun clusters (n = 3 - 7) were calculated to possess open-shell electrons with the unpaired electrons localized on the central U atom. The smaller clusters closely resemble the analogous UFn species, but significant deviations are seen starting with UAu5 where a competition between U-Au and Au-Au bonding begins to become apparent. The UAu6 system appears to mark a transition where Au-Au interactions begin to dominate, where both a ring-like and two heavily distorted octahedral structures around the central U atom are to be nearly isoenergetic. With UAu7, only ring-like structures are calculated. Altogether, the calculated electron detachment energies are in good agreement with the experimental values
- Research Organization:
- Johns Hopkins University, Baltimore, MD (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division (MSE)
- Grant/Contract Number:
- SC0022977; FG02-96ER45579; AC02-05CH11231
- OSTI ID:
- 1995534
- Journal Information:
- Journal of Physical Chemistry. A, Molecules, Spectroscopy, Kinetics, Environment, and General Theory, Journal Name: Journal of Physical Chemistry. A, Molecules, Spectroscopy, Kinetics, Environment, and General Theory Journal Issue: 34 Vol. 127; ISSN 1089-5639
- Publisher:
- American Chemical SocietyCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Similar Records
Gold clusters (Au{sub N}, 2{<=}N{<=}10) and their anions
Au as a Surrogate for F: The Case of UAu6 vs UF6
Photoelectron spectra and structure of the Mn{sub n}{sup −} anions (n = 2–16)
Journal Article
·
Sat Jul 15 00:00:00 EDT 2000
· Physical Review. B, Condensed Matter and Materials Physics
·
OSTI ID:20217219
Au as a Surrogate for F: The Case of UAu6 vs UF6
Journal Article
·
Mon Oct 24 00:00:00 EDT 2022
· Journal of the American Chemical Society
·
OSTI ID:1909835
Photoelectron spectra and structure of the Mn{sub n}{sup −} anions (n = 2–16)
Journal Article
·
Tue Jul 28 00:00:00 EDT 2015
· Journal of Chemical Physics
·
OSTI ID:22493458