Theory of counter-ion condensation on flexible polyelectrolytes: adsorption mechanism.

Theory of counter-ion condensation on flexible polyelectrolytes: adsorption mechanism. Research Abstract Details 

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Theory of counter-ion condensation on flexible polyelectrolytes: adsorption mechanism. Abstract Text:

M Muthukumar,

A new model is presented for counterion distribution around flexible polyelectrolytes by considering (i) free energy of the polyelectrolyte chain, (ii) translational entropy of adsorbed counterions, (iii) adsorption energy, (iv) translational entropy of unadsorbed counterions, (v) fluctuations of dissociated ions, and (vi) correlation among ion-pairs formed by adsorbed counterions on the polymer. The effective charge and size of the polymer are calculated self-consistently. The degree of ionization f of the polymer decreases continuously with 1/epsilonT (epsilon and T are the dielectric constant of the solvent and temperature, respectively), depending sensitively on local dielectric heterogeneity. Further, f decreases with an increase in salt concentration, monomer concentration, or chain flexibility. The polymer size, accompanying the changes in f, depends nonmonotonically on 1/epsilonT. The predictions of the model are consistent with all trends observed previously in simulations and are distinctly different from the Manning argument for rodlike chains.

Theory of counter-ion condensation on flexible polyelectrolytes: adsorption mechanism. Publishing Authors By Initials

M Muthukumar,

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Theory of counter-ion condensation on flexible polyelectrolytes: adsorption mechanism. Journal Published:

PUBLICATION TYPE: Research Support, U.S. Gov't,

Journal: The Journal of chemical physics

VOLUME: 120

Page Numbers: 9343-50

Journal Abbreviation:

ISSN: 0021-9606

DAY: 15

MONTH: May

YEAR: 2004

Theory of counter-ion condensation on flexible polyelectrolytes: adsorption mechanism. Information

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LANGUAGE: eng

NlmUniqueID: 375360

Theory of counter-ion condensation on flexible polyelectrolytes: adsorption mechanism. Keywords Mesh Terms:

KEYWORDS: Models, Molecular

MESH TERMS: chemistry

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Substance Name: Ions

Registry Number: 0

Grant and Affiliation Information for Theory of counter-ion condensation on flexible polyelectrolytes: adsorption mechanism.

AFFILIATION: Polymer Science and Engineering Department, University of Massachusetts, Amherst, Massachusetts 01003, USA. muthu@polysci.umass.edu

Country: United States

AGENCY: United States NHGRI

GRANT: 1R01HG002776-01

ACRONYM: HG

MEDLINETA: J Chem Phys

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