In molecular dynamics (MD) simulations of water, rigid non-polarizable models are still valuable and widely used because of their low computational cost and excellent performance. Most of such models have been for light water (H2O) for a long time, and a few have recently been reported for heavy water (D2O). The specific models of D2O are needed because of its notably slower dynamics and stronger hydrogen bond than H2O. To our knowledge, no models of semi-heavy water (HOD) were made, although HOD is the most abundant and, therefore, most important chemical species in isotopically diluted water (IDW) prepared by mixing equal amounts of H2O and D2O. For precise MD simulations of IDW, a specific model of HOD is definitely needed. Here, we report the development of a new rigid non-polarizable model of HOD, TIP4P/2005-SHW, on the basis of the most popular H2O model, TIP4P/2005, and its D2O counterpart, TIP4P/2005-HW. We show the details of the development and demonstrate the high reproducibility of TIP4P/2005-SHW in terms of the density, the temperature of maximum density, the viscosity, and the diffusion coefficient.
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21 December 2024
Research Article|
December 16 2024
A new rigid non-polarizable model for semi-heavy water: TIP4P/2005-SHW Available to Purchase
Special Collection:
Festschrift in honor of Yuen-Ron Shen
Tetsuyuki Takayama
;
Tetsuyuki Takayama
(Conceptualization, Data curation, Formal analysis, Funding acquisition, Software, Writing – original draft, Writing – review & editing)
Department of Applied Chemistry, Graduate School of Science and Engineering, Saitama University
, 255 Shimo-Okubo, Sakura, Saitama 338-8570, Japan
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Takuhiro Otosu
;
Takuhiro Otosu
(Writing – review & editing)
Department of Applied Chemistry, Graduate School of Science and Engineering, Saitama University
, 255 Shimo-Okubo, Sakura, Saitama 338-8570, Japan
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Shoichi Yamaguchi
Shoichi Yamaguchi
a)
(Conceptualization, Funding acquisition, Writing – original draft, Writing – review & editing)
Department of Applied Chemistry, Graduate School of Science and Engineering, Saitama University
, 255 Shimo-Okubo, Sakura, Saitama 338-8570, Japan
a)Author to whom correspondence should be addressed: [email protected]
Search for other works by this author on:
Tetsuyuki Takayama
Conceptualization, Data curation, Formal analysis, Funding acquisition, Software, Writing – original draft, Writing – review & editing
Department of Applied Chemistry, Graduate School of Science and Engineering, Saitama University
, 255 Shimo-Okubo, Sakura, Saitama 338-8570, Japan
Takuhiro Otosu
Writing – review & editing
Department of Applied Chemistry, Graduate School of Science and Engineering, Saitama University
, 255 Shimo-Okubo, Sakura, Saitama 338-8570, Japan
Shoichi Yamaguchi
Conceptualization, Funding acquisition, Writing – original draft, Writing – review & editing
a)
Department of Applied Chemistry, Graduate School of Science and Engineering, Saitama University
, 255 Shimo-Okubo, Sakura, Saitama 338-8570, Japan
a)Author to whom correspondence should be addressed: [email protected]
J. Chem. Phys. 161, 234501 (2024)
Article history
Received:
September 25 2024
Accepted:
December 03 2024
Citation
Tetsuyuki Takayama, Takuhiro Otosu, Shoichi Yamaguchi; A new rigid non-polarizable model for semi-heavy water: TIP4P/2005-SHW. J. Chem. Phys. 21 December 2024; 161 (23): 234501. https://doi.org/10.1063/5.0240271
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