Effective Charge and Coil−Globule Transition of a Polyelectrolyte Chain
作者： Arindam Kundagrami , M. Muthukumar
DOI: 10.1021/MA9020888
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摘要: Considering the adsorption of counterions on an isolated polyelectrolyte (PE) chain and using a variational theory, phase boundaries critical point for first-order coil-globule transition are calculated. The is induced cooperatively by counterion conformations calculation done self-consistently. size PE single-valued function charge. discontinuous coil accompanied Phase transitions both Coulomb strength (inverse temperature or dielectric constant) ionic (salt) show that collapses at substantially lower in presence salt. In expanded state coil, analytical formula derived effective charge conditions where coupling between weak. general, heterogeneity solvent close to polymer backbone found play crucial role regularization collapse.
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