Dielectric behavior of polyelectrolytes III. The role of counterion interactions.

Dielectric behavior of polyelectrolytes III. The role of counterion interactions. Research Abstract Details 

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Dielectric behavior of polyelectrolytes III. The role of counterion interactions. Abstract Text:

G E Wesenberg,W E Vaughan,

The role of the Coulomb forces between the counterions on the surface of polyelectrolytes on the dielectric response is analyzed. An estimate of the maximum dielectric increment (as a function of the number of counterions) is found as a function of the molecular length. The minimum-energy configuration of the counterions on a cylinder is found to be a double helix, suggesting the fundamental importance of electrostatic interactions in determining structure. Solutions of the dynamical equations for a few counterions indicate that a single mode dominates the relaxation which is enhanced by the inter-ion repulsions. A lower bound is found for this mode based on analysis of the system response for short lengtns. Sum rules for the rates and amplitudes of the dipolar correlation function are derived and lead to an upper bound for the rate of the dominant mode. These bounds approach one another for the parameters characteristic of restriction fragments of DNA. This permits a prediction of the magnitude and time scale of the dielectric response.

Dielectric behavior of polyelectrolytes III. The role of counterion interactions. Publishing Authors By Initials

GE Wesenberg,WE Vaughan,

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Dielectric behavior of polyelectrolytes III. The role of counterion interactions. Journal Published:

PUBLICATION TYPE: Journal Article

Journal: Biophysical chemistry

VOLUME: 18

Page Numbers: 381-90

Journal Abbreviation: Biophys. Chem.

ISSN: 0301-4622

DAY: 28

MONTH: Nov

YEAR: 1983

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LANGUAGE: eng

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Grant and Affiliation Information for Dielectric behavior of polyelectrolytes III. The role of counterion interactions.

AFFILIATION: Department of Chemistry, University of Wisconsin Madison, Madison, WI 53706, U.S.A.

Country: Netherlands

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MEDLINETA: Biophys Chem

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