Counterion condensation revisited
Counterion condensation revisited
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DOI：
10.1080/07391102.1998.10508261
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发表时间：
1998-10-01
影响因子：
4.4
通讯作者：
Ray, J
中科院分区：
文献类型：
--
作者：
Manning, GS;Ray, J
我们回顾了一些的特征性质的结构的反离子的解决方案：凝聚层的抗衡离子，突然在一个临界阈值电荷密度的聚合物链上形成的;更扩散的德拜-休克尔云，这是空间上不同的凝聚层;和熵释放的抗衡离子从凝聚层作为驱动力的结合带相反电荷的配体。我们在各种实验、模拟和理论中提出了我们目前理解的基础;我们也试图澄清一些误解。我们提出了一个新的分析晶格模型，这表明为什么限制法律的热力学已被证明是准确的，尽管在其原始的推导忽略了聚合物-聚合物的相互作用。本文概述了在构建反离子和聚离子之间的势方面的最新进展。位于凝聚层和德拜云之间的界面上的电荷被聚离子排斥，在两个电荷之间产生一个尖锐的边界。
We review some of the characteristic properties of the structure of polyelectrolyte solutions: the condensed layer of counterions that forms abruptly at a critical threshold charge density on the polymer chain; the more diffuse Debye-Huckel cloud, which is spatially distinct from the condensed layer; and the entropic release of counterions from the condensed layer as a driving force for the binding of oppositely charged ligands. We present a reminder of the basis of our current understanding in a variety of experiments, simulations, and theories; and we attempt as well to clarify some misunderstandings. We present a new analysis of a lattice model that suggests why the limiting laws for polyelectrolyte thermodynamics have proved to be accurate despite the neglect of polymer-polymer interactions in their original derivation. We sketch recent progress in constructing a potential between counterion and polyion. A counterion located in the interface between condensed layer and Debye cloud is repelled from the polyion, creating a sharp boundary between the two counterion populations.