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Determination of Relative Counterion Binding Constant to Cationic Micelles
Khalisanni Khalid1,2, Muhammad Azri Mohd Noh3, Sharifuddin Md Zain3
1Department of Chemistry, Faculty of Science, University of Malaya, 50603, Kuala Lumpur, Malaysia. typhloids@gmail.com.
Abstract:
The efficiency of counterion affinity towards ionic micelles is often described in terms of the degree of counterion binding (β X ) to ionic micelles or the conventional ion-exchange constant ([Formula: see text]) or relative binding constant ([Formula: see text]) of X - and Br- counterions. This review describes the use of ionized phenyl salicylate ions, PSa-, as a new probe to determine [Formula: see text] values using a semiempirical spectrophotometric method. The value of [Formula: see text] is found to be comparable to reported values obtained using different probes by the semiempirical kinetic method as well as different physical methods. Application of semiempirical methods for calculation of [Formula: see text] or [Formula: see text] values involves an inherent assumption that these values are independent of the physicochemical characteristics of the probe molecule.
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