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Development of a “First Principles” Water Potential with Flexible Monomers. II: Trimer Potential Energy Surface, Third Virial Coefficient, and Small Clusters

Babin, Volodymyr, Medders, Gregory R., Paesani, Francesco·2014·Journal of Chemical Theory and Computation

Abstract

A full-dimensional potential energy function (MB-pol) for simulations of water from the dimer to bulk phases is developed entirely from "first principles" by building upon the many-body expansion of the interaction energy. Specifically, the MB-pol potential is constructed by combining a highly accurate dimer potential energy surface [J. Chem. Theory Comput. 2013, 9, 5395] with explicit three-body and many-body polarization terms. The three-body contribution, expressed as a combination of permutationally invariant polynomials and classical polarizability, is derived from a fit to more than 12000 three-body energies calculated at the CCSD(T)/aug-cc-pVTZ level of theory, imposing the correct asymptotic behavior as predicted from "first principles". Here, the accuracy of MB-pol is demonstrated through comparison of the calculated third virial coefficient with the corresponding experimental data as well as through analysis of the relative energy differences of small clusters.

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Metadata

Authors
Babin, V., Medders, G. R., & Paesani, F.
Venue
Journal of Chemical Theory and Computation
Published
2014-03-21
Volume
10
Issue
4
Pages
1599-1607
ISSN
  • 1549-9618 (ISSN-L)
  • 1549-9626
OpenAlex
W2312878083
Cited by
436
References
0
FWCI
13.64
Type
journal article
Language
en
Open access
closed

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CoChat. (2026). Citation check: Development of a “First Principles” Water Potential with Flexible Monomers. II: Trimer Potential Energy Surface, Third Virial Coefficient, and Small Clusters. https://app.cochat.ai/papers/10.1021/ct500079y
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Babin, V., Medders, G. R., & Paesani, F. (2014). Development of a “First Principles” Water Potential with Flexible Monomers. II: Trimer Potential Energy Surface, Third Virial Coefficient, and Small Clusters. Journal of Chemical Theory and Computation. https://doi.org/10.1021/ct500079y

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