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  4. The role of Hartree-Fock exchange in the simulation of X-ray absorption spectra: A study of photoexcited [Fe(bpy)(3)](2+)
 
research article

The role of Hartree-Fock exchange in the simulation of X-ray absorption spectra: A study of photoexcited Fe(bpy)(3)

Capano, G.  
•
Penfold, T. J.  
•
Besley, N. A.
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2013
Chemical Physics Letters

We present a theoretical analysis for the K- and L-2/3-edge static and picosecond X-ray absorption spectra of Fe(bpy)(3). Simulations of the pre-edge region at the Fe K-edge using time-dependent density functional theory demonstrate the importance of Hartree-Fock exchange within the exchange-correlation functional, especially when describing charge transfer and 1s -> 3d transitions. This becomes particularly relevant for range separated functionals, for which the incorporation of Hartree-Fock exchange at short range decreases the absolute error in the excitation energy usually observed using TD-DFT. Finally, we compute and interpret the L-2/3-edge spectrum using the Restricted Open-Shell Configuration Interaction Singles method. (C) 2013 Elsevier B.V. All rights reserved.

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Type
research article
DOI
10.1016/j.cplett.2013.06.060
Web of Science ID

WOS:000323017800033

Author(s)
Capano, G.  
Penfold, T. J.  
Besley, N. A.
Milne, C. J.  
Reinhard, M.  
Rittmann-Frank, H.  
Glatzel, P.
Abela, R.
Rothlisberger, U.  
Chergui, M.  
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Date Issued

2013

Publisher

Elsevier

Published in
Chemical Physics Letters
Volume

580

Start page

179

End page

184

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
LSU  
LCBC  
Available on Infoscience
October 1, 2013
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/95638
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