Solute-Solvent Energetics Based on Proximal Distribution Functions

Shu Ching Ou, B. Montgomery Pettitt

Research output: Contribution to journalArticle

7 Scopus citations

Abstract

We consider the hydration structure and thermodynamic energetics of solutes in aqueous solution. On the basis of the dominant local correlation between the solvent and the chemical nature of the solute atoms, proximal distribution functions (pDF) can be used to quantitatively estimate the hydration pattern of the macromolecules. We extended this technique to study the solute-solvent energetics including the van der Waals terms representing excluded volume and tested the method with butane and propanol. Our results indicate that the pDF-reconstruction algorithm can reproduce van der Waals solute-solvent interaction energies to useful kilocalorie per mole accuracy. We subsequently computed polyalanine-water interaction energies for a variety of conformers, which also showed agreement with the simulated values.

Original languageEnglish (US)
Pages (from-to)8230-8237
Number of pages8
JournalJournal of Physical Chemistry B
Volume120
Issue number33
DOIs
StatePublished - Aug 25 2016

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films
  • Materials Chemistry

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