Calculations of Hydration Entropies of Hydrophobic, Polar, and Ionic Solutes in the Framework of the Langevin Dipoles Solvation Model

1999 ◽  
Vol 103 (46) ◽  
pp. 10282-10288 ◽  
Author(s):  
Jan Florián ◽  
Arieh Warshel
Keyword(s):  
Solvation Model ◽  
Langevin Dipoles ◽  
Ionic Solutes

Assessment of the Langevin dipoles solvation model for Hartree-Fock wavefunctions

1996 ◽  
Vol 366 (1-2) ◽  
pp. 1-9 ◽  
Author(s):  
Nathaniel O.J. Malcolm ◽  
Joseph J.W. McDouall
Keyword(s):  
Solvation Model ◽  
Hartree Fock ◽  
Langevin Dipoles

Spectral characteristics of the weakly bound electron species in methanol as determined from a hybrid solvation model

1996 ◽  
Vol 93 ◽  
pp. 182-187 ◽  
Author(s):  
C Pépin ◽  
T Goulet ◽  
D Houde ◽  
JP Jay-Gerin
Keyword(s):  
Spectral Characteristics ◽  
Solvation Model ◽  
Weakly Bound ◽  
Bound Electron

Partition Coefficients of Methylated DNA Bases Obtained from Free Energy Calculations with Molecular Electron Density Derived Atomic Charges.

2018 ◽  
Author(s):  
Alejandro Lara ◽  
Maximiliano Riquelme ◽  
Esteban Vöhringer-Martinez
Keyword(s):  
Electron Density ◽  
Partition Coefficients ◽  
Dna Bases ◽  
Atomic Charges ◽  
Free Energies ◽  
Solvation Model ◽  
Minimal Basis ◽  
Methylated Dna ◽  
Implicit Solvation Model ◽  
Good Agreement

<div> <div> <div> <p>Partition coefficients serve in various areas as pharmacology and environmental sciences to predict the hydrophobicity of different substances. Recently, they have been also used to address the accuracy of force fields for various organic compounds and specifically the methylated DNA bases. In this study atomic charges were derived by different partitioning methods (Hirshfeld and Minimal Basis Iterative Stockholder) directly from the electron density obtained by electronic structure calculations in vac- uum, with an implicit solvation model or with explicit solvation taking the dynamics of the solute and the solvent into account. To test the ability of these charges to describe electrostatic interactions in force fields for condensed phases the original atomic charges of the AMBER99 force field were replaced with the new atomic charges and combined with different solvent models to obtain the hydration and chloroform solvation free energies by molecular dynamics simulations. Chloroform-water partition coefficients derived from the obtained free energies were compared to experimental and previously reported values obtained with the GAFF or the AMBER-99 force field. The results show that good agreement with experimental data is obtained when the polarization of the electron density by the solvent has been taken into account deriving the atomic charges of polar DNA bases and when the energy needed to polarize the electron den- sity of the solute has been considered in the transfer free energy. These results were further confirmed by hydration free energies of polar and aromatic amino acid side chain analogues. Comparison of the two partitioning methods Hirsheld-I and Minimal Basis Iterative Stockholder (MBIS) revealed some deficiencies in the Hirshfeld-I method related to nonexistent isolated anionic nitrogen pro-atoms used in the method. Hydration free energies and partitioning coefficients obtained with atomic charges from the MBIS partitioning method accounting for polarization by the implicit solvation model are in good agreement with the experimental values. </p> </div> </div> </div>

A Universal Organic Solvation Model.

2000 ◽  
Vol 65 (18) ◽  
pp. 5886-5886 ◽  
Author(s):  
David J. Giesen ◽  
Michael Z. Gu ◽  
Christopher J. Cramer ◽  
Donald G. Truhlar
Keyword(s):  
Solvation Model

Predicting cyclohexane/water distribution coefficients for the SAMPL5 challenge using MOSCED and the SMD solvation model

2016 ◽  
Vol 30 (11) ◽  
pp. 1007-1017 ◽  
Author(s):  
Sebastian Diaz-Rodriguez ◽  
Samantha M. Bozada ◽  
Jeremy R. Phifer ◽  
Andrew S. Paluch
Keyword(s):  
Water Distribution ◽  
Distribution Coefficients ◽  
Solvation Model

Erratum: “Density functional solvation model based on CM2 atomic charges” [J. Chem. Phys. 109, 9117 (1998); 111, 5624 (E) (1999)]

2000 ◽  
Vol 113 (9) ◽  
pp. 3930-3930
Author(s):  
Tianhai Zhu ◽  
Jiabo Li ◽  
Gregory D. Hawkins ◽  
Christopher J. Cramer ◽  
Donald G. Truhlar
Keyword(s):  
Density Functional ◽  
Chem Phys ◽  
Atomic Charges ◽  
Solvation Model ◽  
Model Based

On the calculation of phase equilibria in aqueous two-phase systems containing ionic solutes

1995 ◽  
Vol 106 (1-2) ◽  
pp. 17-25 ◽  
Author(s):  
Christoph Großmann ◽  
Gerd Maurer
Keyword(s):  
Phase Equilibria ◽  
Two Phase ◽  
Aqueous Two Phase Systems ◽  
Phase Systems ◽  
Ionic Solutes
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