title: Determination of Relative Counterion Binding Constant to Cationic Micelles.
abstract: The efficiency of counterion affinity towards ionic micelles is often described in terms of the degree of counterion binding (βX) 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.
authors.affiliation: Department of Chemistry, Faculty of Science, University of Malaya, 50603, Kuala Lumpur, Malaysia. typhloids@gmail.com.|Laboratory Management Program, Laboratory and Technical Service Centre, Malaysian Agricultural Research and Development Institute (MARDI), 43400, Serdang, Selangor, Malaysia. typhloids@gmail.com.
authors.forename: Khalisanni
authors.initials: K
authors.lastname: Khalid
authors.affiliation: Department of Chemistry, Faculty of Science, University of Malaya, 50603, Kuala Lumpur, Malaysia.
authors.forename: Muhammad Azri Mohd
authors.initials: MAM
authors.lastname: Noh
authors.affiliation: Department of Chemistry, Faculty of Science, University of Malaya, 50603, Kuala Lumpur, Malaysia.
authors.forename: Sharifuddin Md
authors.initials: SM
authors.lastname: Zain
authors.affiliation: Department of Chemistry, Faculty of Science, University of Malaya, 50603, Kuala Lumpur, Malaysia. niyaz@um.edu.my.
authors.forename: M Niyaz
authors.initials: MN
authors.lastname: Khan
mesh_terms: D002412:Cations / Q000737:chemistry; D008823:Micelles; D015335:Molecular Probes / Q000737:chemistry*; D012459:Salicylates / Q000737:chemistry*
chemical_list: D002412:Cations; D008823:Micelles; D015335:Molecular Probes; D012459:Salicylates; C026041:phenyl salicylate
keywords: Counterions; Micelles; Probe molecule; SEK method; SESp method