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• W2000793695 abstract "A polarizable empirical force field based on the classical Drude oscillator has been developed for the aliphatic alcohol series. The model is optimized with an emphasis on condensed-phase properties and is validated against a variety of experimental data. Transferability of the developed parameters is emphasized by the use of a single electrostatic model for the hydroxyl group throughout the alcohol series. Aliphatic moiety parameters were transferred from the polarizable alkane parameter set, with only the Lennard-Jones parameters on the carbon in methanol optimized. The developed model yields good agreement with pure solvent properties with the exception of the heats of vaporization of 1-propanol and 1-butanol, which are underestimated by approximately 6%; special LJ parameters for the oxygen in these two molecules that correct for this limitation are presented. Accurate treatment of the free energies of aqueous solvation required the use of atom-type specific Oalcohol−Owater LJ interaction terms, with specific terms used for the primary and secondary alcohols. With respect to gas-phase properties the polarizable model overestimates experimental dipole moments and quantum mechanical interaction energies with water by approximately 10 and 8%, respectively, a significant improvement over 44 and 46% overestimations of the corresponding properties in the CHARMM22 fixed-charge additive model. Comparison of structural properties of the polarizable and additive models for the pure solvents and in aqueous solution shows significant differences indicating atomic details of intermolecular interactions to be sensitive to the applied force field. The polarizable model predicts pure solvent and aqueous phase dipole moment distributions for ethanol centered at 2.4 and 2.7 D, respectively, a significant increase over the gas-phase value of 1.8 D, whereas in a solvent of lower polarity, benzene, a value of 1.9 is obtained. The ability of the polarizable model to yield changes in the dipole moment as well as the reproduction of a range of condensed-phase properties indicates its utility in the study of the properties of alcohols in a variety of condensed-phase environments as well as representing an important step in the development of a comprehensive force field for biological molecules." @default.
• W2000793695 created "2016-06-24" @default.
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• W2000793695 date "2007-08-15" @default.
• W2000793695 modified "2023-10-16" @default.
• W2000793695 title "Polarizable Empirical Force Field for the Primary and Secondary Alcohol Series Based on the Classical Drude Model" @default.
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• W2000793695 doi "https://doi.org/10.1021/ct700100a" @default.
• W2000793695 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/2542883" @default.
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