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A Simple Theoretical Model for Ion Cooperativity in Aqueous Solutions of Simple Inorganic Salts and its Effect on Water Surface Tension.
MedLine Citation:
PMID:  21958050     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
Careful analysis of experimental data showed that the salt aqueous solution/air surface tension depends in a rather complicated manner on the salt composition and points to the importance of ion cooperativity. In this short paper, we include the selective binding of anions over cations at interfaces (as revealed from molecular dynamics simulations, spectroscopic measurements, and Record's analysis of surface tension data) and the anion-cation association (based on the observation of "matching water affinity") in a simple theoretical model to understand salt effects on surface tension. The introduction of the surface effect and ion association provides a qualitative explanation of experimental data, in particular the strong anion dependence of the cations' rank according to their ability of increasing water surface tension. We hope that the physical insight provided by this study can be used to point to new directions for more detailed studies.
Authors:
Yi Qin Gao
Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2011-9-29
Journal Detail:
Title:  The journal of physical chemistry. B     Volume:  -     ISSN:  1520-5207     ISO Abbreviation:  -     Publication Date:  2011 Sep 
Date Detail:
Created Date:  2011-9-30     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101157530     Medline TA:  J Phys Chem B     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
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