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Ion binding to interfaces

Wennerström, Håkan LU (2004) In Current Opinion in Colloid & Interface Science 9(1-2). p.163-164
Abstract
A multitude of crucial chemical phenomena occur in the region where an aqueous medium meets a more apolar environment. The change in the character of the medium can be due to a macroscopic phase boundary, but it is much more common that it is due to the presence of an aggregate, a macromolecule or even an apolar molecule of moderate size. One aspect of such a transition region from polar to apolar is how small ions respond to such an environment. Based on a purely electrostatic point charge model one would expect the ions to be repelled by the apolar medium since it is less effective in accommodating the electric field emanating from the charge. This effect is often described as due to the repulsion between the source charge and its image... (More)
A multitude of crucial chemical phenomena occur in the region where an aqueous medium meets a more apolar environment. The change in the character of the medium can be due to a macroscopic phase boundary, but it is much more common that it is due to the presence of an aggregate, a macromolecule or even an apolar molecule of moderate size. One aspect of such a transition region from polar to apolar is how small ions respond to such an environment. Based on a purely electrostatic point charge model one would expect the ions to be repelled by the apolar medium since it is less effective in accommodating the electric field emanating from the charge. This effect is often described as due to the repulsion between the source charge and its image and its consequences for the surface tension of aqueous electrolyte solutions were worked out by Onsager and Samaras. Cations like alkali metal ions and alkaline earth metal ions largely respond to apolar environments as one would expect from the simple electrostatics model, but for anions, like the halogen ions, there are large quantitative and even qualitative deviations. (C) 2004 Elsevier Ltd. All rights reserved. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Ion binding, Aqueous medium, Polar–apolar transition
in
Current Opinion in Colloid & Interface Science
volume
9
issue
1-2
pages
163 - 164
publisher
Elsevier
external identifiers
  • wos:000223973800028
  • scopus:4444361253
ISSN
1359-0294
DOI
10.1016/j.cocis.2004.05.023
language
English
LU publication?
yes
id
dfd6ac91-f118-4d15-a253-30e829d73a22 (old id 154083)
date added to LUP
2007-07-12 14:15:20
date last changed
2017-01-01 06:51:22
@article{dfd6ac91-f118-4d15-a253-30e829d73a22,
  abstract     = {A multitude of crucial chemical phenomena occur in the region where an aqueous medium meets a more apolar environment. The change in the character of the medium can be due to a macroscopic phase boundary, but it is much more common that it is due to the presence of an aggregate, a macromolecule or even an apolar molecule of moderate size. One aspect of such a transition region from polar to apolar is how small ions respond to such an environment. Based on a purely electrostatic point charge model one would expect the ions to be repelled by the apolar medium since it is less effective in accommodating the electric field emanating from the charge. This effect is often described as due to the repulsion between the source charge and its image and its consequences for the surface tension of aqueous electrolyte solutions were worked out by Onsager and Samaras. Cations like alkali metal ions and alkaline earth metal ions largely respond to apolar environments as one would expect from the simple electrostatics model, but for anions, like the halogen ions, there are large quantitative and even qualitative deviations. (C) 2004 Elsevier Ltd. All rights reserved.},
  author       = {Wennerström, Håkan},
  issn         = {1359-0294},
  keyword      = {Ion binding,Aqueous medium,Polar–apolar transition},
  language     = {eng},
  number       = {1-2},
  pages        = {163--164},
  publisher    = {Elsevier},
  series       = {Current Opinion in Colloid & Interface Science},
  title        = {Ion binding to interfaces},
  url          = {http://dx.doi.org/10.1016/j.cocis.2004.05.023},
  volume       = {9},
  year         = {2004},
}