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Hartree–Fock exchange in time dependent density functional theory: application to charge transfer excitations in solvated molecular systems


Bernasconi, L; Sprik, M; Hutter, J (2004). Hartree–Fock exchange in time dependent density functional theory: application to charge transfer excitations in solvated molecular systems. Chemical Physics Letters, 394(1-3):141-146.

Abstract

The performance of time dependent density functional theory methods for the computation of electronic absorption spectra of molecular solutions is investigated using aqueous acetone as model system. Solute and solvent are treated at the same level of theory. Whereas transition energy and intensity for the intra-molecular (1)A(2)n-->pi{*} transition are described to good accuracy by a conventional generalised gradient corrected exchange correlation functional (BLYP), explicit inclusion of exact exchange is found to be a necessary requirement to suppress overlap of the carbonyl band with spurious excitations involving transfer of electron charge from or to states with non negligible solvent character.

The performance of time dependent density functional theory methods for the computation of electronic absorption spectra of molecular solutions is investigated using aqueous acetone as model system. Solute and solvent are treated at the same level of theory. Whereas transition energy and intensity for the intra-molecular (1)A(2)n-->pi{*} transition are described to good accuracy by a conventional generalised gradient corrected exchange correlation functional (BLYP), explicit inclusion of exact exchange is found to be a necessary requirement to suppress overlap of the carbonyl band with spurious excitations involving transfer of electron charge from or to states with non negligible solvent character.

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Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:07 Faculty of Science > Department of Chemistry
Dewey Decimal Classification:540 Chemistry
Language:English
Date:August 2004
Deposited On:26 Mar 2009 20:40
Last Modified:05 Apr 2016 12:26
Publisher:Elsevier
ISSN:0009-2614
Publisher DOI:10.1016/j.cplett.2004.06.121
Permanent URL: http://doi.org/10.5167/uzh-3183

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