_tcm18-11426.gif )
High quality research in physical chemistry, chemical physics and biophysical chemistry.
Subscribers
Non-subscribers
- Purchase article PDF [£27 + taxes]
- Purchase article PDF member offer [£5 + taxes]
Free access
Paper
Phys. Chem. Chem. Phys., 2009, 11, 10350 - 10358, DOI: 10.1039/b912718f
Time-dependent density functional theory calculations of near-edge X-ray absorption fine structure with short-range corrected functionals
Nicholas A. Besley, Michael J. G. Peach and David J. Tozer
We report calculations of core excitation energies and near-edge X-ray absorption fine structure (NEXAFS) spectra computed with time-dependent density functional theory (TDDFT). TDDFT with generalized gradient approximation and standard hybrid exchange–correlation functionals is known to underestimate core excitation energies. This failure is shown to be associated with the self-interaction error at short interelectronic distances. Short-range corrected hybrid functionals are shown to reduce the error in the computed core excitation energies for first and second row nuclei in a range of molecules to a level approaching that observed in more traditional excited states calculations in the ultraviolet region. NEXAFS spectra computed with the new functionals agree well with experiment and the pre-edge features in the NEXAFS spectra of plastocyanin are correctly predicted.
RSS feed