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• W2023551164 abstract "A classical density functional theory approach to solvation in molecular solvent is presented. The solvation properties of an arbitrary solute in a given solvent, both described by a molecular force field, can be obtained by minimization of a position and orientation-dependent free-energy density functional. In the homogeneous reference fluid approximation, limited to two-body correlations, the unknown excess term of the functional approximated by the angular-dependent direct correlation function of the pure solvent. We show that this function can be extracted from a preliminary MD simulation of the pure solvent by computing the angular-dependent pair distribution function and solving subsequently the molecular Ornstein-Zernike equation using a discrete angular representation. The corresponding functional can then be minimized in the presence of an arbitrary solute on a three-dimensional cubic grid for positions and Gauss-Legendre angular grid for orientations to provide the solvation structure and free-energy. This two-step procedure is proved to be much more efficient than direct molecular dynamics simulations combined to thermodynamic integration schemes. The approach is shown to be relevant and accurate for prototype polar solvents such as the Stockmayer solvent or acetonitrile. For water, although correct for neutral or moderately charged solute, it tends to underestimate the tetrahedral solvation structure around H-bonded solutes, such as spherical ions. This can be corrected by introducing suitable three-body correlation terms that restore both an accurate hydration structure and a satisfactory energetics." @default.
• W2023551164 created "2016-06-24" @default.
• W2023551164 creator A5001924045 @default.
• W2023551164 creator A5003260395 @default.
• W2023551164 creator A5012329595 @default.
• W2023551164 creator A5060343355 @default.
• W2023551164 date "2011-05-16" @default.
• W2023551164 modified "2023-09-25" @default.
• W2023551164 title "Molecular density functional theory of solvation: From polar solvents to water" @default.
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• W2023551164 doi "https://doi.org/10.1063/1.3589142" @default.
• W2023551164 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/21599039" @default.
• W2023551164 hasPublicationYear "2011" @default.
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