Evaluating london dispersion interactions in DFT: A nonlocal anisotropic buckingham-hirshfeld model

Alisa Krishtal, D. Geldof, K. Vanommeslaeghe, C. Van Alsenoy, P. Geerlings

Research output: Contribution to journalArticlepeer-review

17 Scopus citations

Abstract

In this work, we present a novel model, referred to as BH-DFT-D, for the evaluation of London dispersion, with the purpose to correct the performance of local DFT exchange-correlation functionals for the description of van der Waals interactions. The new BH-DFT-D model combines the equations originally derived by Buckingham [Buckingham, A. D. Adv. Chem. Phys1967, 12, 107] with the definition of distributed multipole polarizability tensors within the Hirshfeld method [Hirshfeld, F.L. Theor. Chim. Acta1977, 44, 129], resulting in nonlocal, fully anisotropic expressions. Since no damping function has been introduced yet into the model, it is suitable in its present form for the evaluation of dispersion interactions in van der Waals dimers with no or negligible overlap. The new method is tested for an extended collection of van der Waals dimers against high-level data, where it is found to reproduce interaction energies at the BH-B3LYP-D/aug-cc-pVTZ level with a mean average error (MAE) of 0.20 kcal/mol. Next, development steps of the model will consist of adding a damping function, analytical gradients, and generalization to a supramolecular system.

Original languageEnglish (US)
Pages (from-to)125-134
Number of pages10
JournalJournal of Chemical Theory and Computation
Volume8
Issue number1
DOIs
StatePublished - Jan 10 2012
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Computer Science Applications
  • Physical and Theoretical Chemistry

Fingerprint Dive into the research topics of 'Evaluating london dispersion interactions in DFT: A nonlocal anisotropic buckingham-hirshfeld model'. Together they form a unique fingerprint.

Cite this