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Isobaric−Isothermal Molecular Dynamics Simulations Utilizing Density Functional Theory: An Assessment of the Structure and Density of Water at Near-Ambient Conditions

Open access
Schmidt, Jochen, VandeVondele, Joost, Kuo, I.-F. William, Sebastiani, Daniel, Siepmann, J. Ilja, Hutter, Jürg, Mundy, Christopher J.·2009·The Journal of Physical Chemistry B

Abstract

We present herein a comprehensive density functional theory study toward assessing the accuracy of two popular gradient-corrected exchange correlation functionals on the structure and density of liquid water at near ambient conditions in the isobaric-isothermal ensemble. Our results indicate that both PBE and BLYP functionals under predict the density and over structure the liquid. Adding the dispersion correction due to Grimme (1, 2) improves the predicted densities for both BLYP and PBE in a significant manner. Moreover, the addition of the dispersion correction for BLYP yields an oxygen-oxygen radial distribution function in excellent agreement with experiment. Thus, we conclude that one can obtain a very satisfactory model for water using BLYP and a correction for dispersion.

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Crossref · 10.1021/jp901990u

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Metadata

Authors
Schmidt, J., VandeVondele, J., Kuo, I.-F. W., Sebastiani, D., Siepmann, J. I., Hutter, J., & Mundy, C. J.
Venue
The Journal of Physical Chemistry B
Published
2009-08-07
Volume
113
Issue
35
Pages
11959-11964
ISSN
  • 1520-5207 (ISSN-L)
  • 1520-6106
OpenAlex
W1965903245
Cited by
358
References
45
FWCI
17.29
Type
journal article
Language
en
Open access
green

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