Interplay between Polarizability and Hydrogen Bond Network of Water: Reparametrizing the Flexible Single-Point-Charge Water Model by the Nonlinear Adaptive Force Matching Approach
| Autor: | I-Shou Huang, Ming Kang Tsai |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
010304 chemical physics
Chemistry Scattering Intermolecular force Isotropy 010402 general chemistry 01 natural sciences Molecular physics 0104 chemical sciences Nonlinear system Solvation shell Polarizability 0103 physical sciences Physics::Atomic and Molecular Clusters Water model Physics::Chemical Physics Physical and Theoretical Chemistry Multipole expansion |
| Zdroj: | The journal of physical chemistry. A. 122(19) |
| ISSN: | 1520-5215 |
| Popis: | An adaptive force matching (AFM) scheme using the nonlinear optimization to reparametrize the three-site, flexible, and polarizable single-point-charge (SPC) water model is reported. We compare the radial distribution functions of the intermolecular oxygen–oxygen, oxygen–hydrogen, and hydrogen–hydrogen distances with the recent scattering experiments, the previous AFM-fitting water model (MP2f), and the atomic multipole expanded AMOEBA model. Our nonpolarizable SPC-3f(0) model captures the feature of the first solvation shell of bulk water. With the ad hoc inclusion of the isotropic polarizability, the polarizable SPC-3f(0.6) water model recovers the many-body effect of the second solvation shell. In the n-body decomposition analysis, the SPC-3f(0) model predicts the best agreement with MP2/aug-cc-pVTZ calculations with the use of the low-dimensional (H2O)4-ring and (H2O)6-ring clusters. For the comparison using the three-dimensional (H2O)6-prism and (H2O)16-4444a clusters, SPC-3f(0.6) predicts the result... |
| Databáze: | OpenAIRE |
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