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Structure and Dynamics of the TIP3P, SPC, and SPC/E Water Models at 298 K

Mark, Pekka, Nilsson, Lennart·2001·The Journal of Physical Chemistry A

Abstract

Molecular dynamics simulations of five water models, the TIP3P (original and modified), SPC (original and refined), and SPC/E (original), were performed using the CHARMM molecular mechanics program. All simulations were carried out in the microcanonical NVE ensemble, using 901 water molecules in a cubic simulation cell furnished with periodic boundary conditions at 298 K. The SHAKE algorithm was used to keep water molecules rigid. Nanosecond trajectories were calculated with all water models for high statistical accuracy. The characteristic self-diffusion coefficients D and radial distribution functions, g OO, g OH, and g HH for all five water models were determined and compared to experimental data. The effects of velocity rescaling on the self-diffusion coefficient D were examined. All these empirical water models used in this study are similar by having three interaction sites, but the small differences in their pair potentials composed of Lennard-Jones (LJ) and Coulombic terms give significant differences in the calculated self-diffusion coefficients, and in the height of the second peak of the radial distribution function g OO .

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Authors
Mark, P., & Nilsson, L.
Venue
The Journal of Physical Chemistry A
Published
2001-10-06
Volume
105
Issue
43
Pages
9954-9960
ISSN
  • 1089-5639 (ISSN-L)
  • 1520-5215
OpenAlex
W2060079863
Cited by
4,571
References
0
FWCI
4.83
Type
journal article
Language
en
Open access
closed

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