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Willow SY, Salim MA, Kim KS, et al. Ab initio molecular dynamics of liquid water using embedded-fragment second-order many-body perturbation theory towards its accurate property prediction. Sci Rep. 2015;5:14358doi: 10.1038/srep14358.
Willow, S. Y., Salim, M. A., Kim, K. S., & Hirata, S. (2015). Ab initio molecular dynamics of liquid water using embedded-fragment second-order many-body perturbation theory towards its accurate property prediction. Scientific reports, 514358. https://doi.org/10.1038/srep14358
Willow, Soohaeng Yoo, et al. "Ab initio molecular dynamics of liquid water using embedded-fragment second-order many-body perturbation theory towards its accurate property prediction." Scientific reports vol. 5 (2015): 14358. doi: https://doi.org/10.1038/srep14358
Willow SY, Salim MA, Kim KS, Hirata S. Ab initio molecular dynamics of liquid water using embedded-fragment second-order many-body perturbation theory towards its accurate property prediction. Sci Rep. 2015 Sep 24;5:14358. doi: 10.1038/srep14358. PMID: 26400690; PMCID: PMC4585828.
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Sci Rep. 2015 Sep 24;5:14358. doi: 10.1038/srep14358.

Ab initio molecular dynamics of liquid water using embedded-fragment second-order many-body perturbation theory towards its accurate property prediction.

Scientific reports

Soohaeng Yoo Willow, Michael A Salim, Kwang S Kim, So Hirata

Affiliations

  1. Department of Chemistry, University of Illinois at Urbana-Champaign, 600 South Mathews Avenue, Urbana, Illinois 61801, USA.
  2. Center for Superfunctional Materials, Department of Chemistry, Ulsan National Institute of Science and Technology (UNIST), Ulsan 689-798, Korea.
  3. CREST, Japan Science and Technology Agency, 4-1-8 Honcho, Kawaguchi, Saitama 332-0012, Japan.

PMID: 26400690 PMCID: PMC4585828 DOI: 10.1038/srep14358

Abstract

A direct, simultaneous calculation of properties of a liquid using an ab initio electron-correlated theory has long been unthinkable. Here we present structural, dynamical, and response properties of liquid water calculated by ab initio molecular dynamics using the embedded-fragment spin-component-scaled second-order many-body perturbation method with the aug-cc-pVDZ basis set. This level of theory is chosen as it accurately and inexpensively reproduces the water dimer potential energy surface from the coupled-cluster singles, doubles, and noniterative triples with the aug-cc-pVQZ basis set, which is nearly exact. The calculated radial distribution function, self-diffusion coefficient, coordinate number, and dipole moment, as well as the infrared and Raman spectra are in excellent agreement with experimental results. The shapes and widths of the OH stretching bands in the infrared and Raman spectra and their isotropic-anisotropic Raman noncoincidence, which reflect the diverse local hydrogen-bond environment, are also reproduced computationally. The simulation also reveals intriguing dynamic features of the environment, which are difficult to probe experimentally, such as a surprisingly large fluctuation in the coordination number and the detailed mechanism by which the hydrogen donating water molecules move across the first and second shells, thereby causing this fluctuation.

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