Journal
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
Volume 3, Issue 23, Pages 3565-3570Publisher
AMER CHEMICAL SOC
DOI: 10.1021/jz301479j
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Funding
- Swedish Research Council (VR)
- Carl Trygger Foundation
- Magnus Bergvall Foundation
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A new ab initio approach to the calculation of X-ray spectra is demonstrated. It combines a high-level quantum chemical description of the chemical interactions and local atomic multiplet effects. We show here calculated L-edge X-ray absorption (XA) and resonant inelastic X-ray scattering spectra for aqueous Ni2+ and XA spectra for a polypyridyl iron complex. Our quantum chemical calculations on a high level of accuracy in a post-Hartree-Fock framework give excellent agreement with experiment. This opens the door to reliable and detailed information on chemical interactions and the valence electronic structure in 3d transition-metal complexes also in transient excited electronic states. As we combine a molecular-orbital description with a proper treatment of local atomic electron correlation effects, our calculations uniquely allow, in particular, identifying the influence of interatomic chemical interactions versus intra-atomic correlations in the L-edge X-ray spectra.
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