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Pure Appl. Chem., 2008, Vol. 80, No. 6, pp. 1267-1279

Ionic interactions in aqueous mixtures of hydrophilic and -phobic ions

Anil Kumar

Physical Chemistry Division, National Chemical Laboratory, Pune 411008, India

Abstract: Ions of both hydrophilic and -phobic nature play a pivotal role in biological systems and during synthesis of many organic molecules. However, the interaction of a hydrophilic ion with a hydrophobic one is not a simple physical process and is useful in understanding the rate enhancement in organic transformations and thermal stability of DNA and RNA. During the talk, an attempt was made to present some of the experimental work on aqueous mixtures of these ions carried out at National Chemical Laboratory, Pune, and give a theoretical interpretation of the binary, ternary, and quaternary interactions operating in these systems. The contribution of these interaction terms to the excess free energy of mixing, ΔmGE, will be analyzed.