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Structure and Dynamics of Liquid Water from ab Initio Molecular Dynamics—Comparison of BLYP, PBE, and revPBE Density Functionals with and without van der Waals Corrections

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Lin, I-Chun, Seitsonen, Ari P., Tavernelli, Ivano, Rothlisberger, Ursula·2012·Journal of Chemical Theory and Computation

Abstract

We investigate the accuracy provided by different treatments of the exchange and correlation effects, in particular the London dispersion forces, on the properties of liquid water using ab initio molecular dynamics simulations with density functional theory. The lack of London dispersion forces in generalized gradient approximations (GGAs) is remedied by means of dispersion-corrected atom-centered potentials (DCACPs) or damped atom-pairwise dispersion corrections of the C6R(-6) form. We compare results from simulations using GGA density functionals (BLYP, PBE, and revPBE) with data from their van der Waals (vdW) corrected counterparts. As pointed out previously, all vdW-corrected BLYP simulations give rise to highly mobile water whose softened structure is closer to experimental data than the one predicted by the bare BLYP functional. Including vdW interactions in the PBE functional, on the other hand, has little influence on both structural and dynamical properties of water. Augmenting the revPBE functional with either damped atom-pairwise dispersion corrections or DCACP evokes opposite behaviors. The former further softens the already under-structured revPBE water, whereas the latter makes it more glassy. These results demonstrate the delicacy needed in describing weak interactions in molecular liquids.

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Metadata

Authors
Lin, I.-C., Seitsonen, A. P., Tavernelli, I., & Rothlisberger, U.
Venue
Journal of Chemical Theory and Computation
Published
2012-06-22
Volume
8
Issue
10
Pages
3902-3910
ISSN
  • 1549-9618 (ISSN-L)
  • 1549-9626
OpenAlex
W2066182614
Cited by
324
References
49
FWCI
11.13
Type
journal article
Language
en
Open access
green

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