A Model for Hydration and Diffusion of Polyions

For polyelectrolytes containing discrete charged groups, the usual configuration is cylindrical. Thus, the field midway along the chain is described by Conway (1982) as 

Free-Energy Changes for the Introduction of a Water Molecule into Pure Water and into Two Cavities in Sulfate-Binding Protein (SBP)  

Energy component Theoretical Al for Pure Water Experimental AC for Pure Water Theoretical AA for Hydrated Cavity in SBP Theoretical AA for Dry Cavity in SBP 

As expected, e. decreases near the ions concerned. However, the structure of water is disturbed by the field from such charged bodies only 500-600 pm out into the solvent. 

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