Using nonlocal electrostatics for solvation free energy computations: ions and small molecules

Details Using nonlocal electrostatics for solvation free energy computations: ions and small molecules Using nonlocal electrostatics for solvation free energy computations: ions and small molecules

2002-12-19

arxiv.org/abs/physics/0212074v2

Physics

Biological Physics

Scientific paper

Solvation free energy is an important quantity in Computational Chemistry with a variety of applications, especially in drug discovery and design. The accurate prediction of solvation free energies of small molecules in water is still a largely unsolved problem, which is mainly due to the complex nature of the water-solute interactions. In this letter we develop a scheme for the determination of the electrostatic contribution to the solvation free energy of charged molecules based on nonlocal electrostatics involving a minimal parameter set which in particular allows to introduce atomic radii in a consistent way. We test our approach on simple ions and small molecules for which both experimental results and other theoretical descriptions are available for quantitative comparison. We conclude that our approach is both physically transparent and quantitatively reliable.

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