Interfacial ion exchange between monovalent and divalent anions in cationic micelles, revised in the light of correlation analysis

Blagoeva, Iva B.; Ouarti, Nadia; Seoud, Omar A. El; Ruasse, Marie‐Françoise

doi:10.1002/poc.953

Cited by 4 publications

(2 citation statements)

References 26 publications

(14 reference statements)

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“…The use of the PIE model has been extended to such reactions in the presence of reversed micelles, microemulsions, mixed micelles, and vesicles . Although the PIE model , and its various extensions as well as the PIE model coupled with an empirical equation explain a large amount of kinetic data in an apparent satisfactory sense, its inherent weakness has become more apparent in recent years. , …”

Section: Introductionmentioning

confidence: 99%

Effects of [NaBr] on the Rate of Intramolecular General Base-Assisted Hydrolysis of N-(2′-Hydroxyphenyl)phthalimide in the Presence of Cationic Micelles: Kinetic Evidence for the Probable Micellar Structural Transition

Khan

Azri

2010

J. Phys. Chem. B

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Pseudofirst-order rate constants for aqueous cleavage of N-(2'-hydroxyphenyl)phthalimide (1), obtained at 0.001 M NaOH, 2 x 10(-4) M 1, 2% v/v CH(3)CN, and 30 degrees C, show a nonmonotonic decrease with the increase in the total concentration of cetyltrimethylammonium bromide ([CTABr](T)) within its range >/=9 x 10(-5)-or=0.04 M CTABr and within a [NaBr] range of 0.0-0.005 M. These observations, in view of the pseudophase (PP) model of the micelle, reveal the presence of presumably spherical micelles at or=4 x 10(-4) M causes a micellar structural transition from most likely spherical to cylindrical, which is evident from the increase in K(S) values from 3.46 x 10(3) to 11.4 x 10(3) M(-1) with the increase in [CTABr](T) from 4 x 10(-4) to approximately 1 x 10(-3) M in the absence of NaBr. The values of k(obs) at different [NaBr] and at a constant [CTABr](T) follow a kinetic relationship derived from an empirical equation coupled with a PP model of micelle. This relationship gives the value of a kinetic parameter, F(X/S), which represents the fraction of micellized S(-) (S(-) = 1(-)) transferred to the aqueous phase by the limiting concentration of X(-) (X(-) = Br(-)) through ion exchange X(-)/S(-). The value of F(Br/1) is 0.65 +/- 0.12.

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Section: Introductionmentioning

confidence: 99%

Effects of [NaBr] on the Rate of Intramolecular General Base-Assisted Hydrolysis of N-(2′-Hydroxyphenyl)phthalimide in the Presence of Cationic Micelles: Kinetic Evidence for the Probable Micellar Structural Transition

Khan

Azri

2010

J. Phys. Chem. B

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“…The apparent weaknesses of the PIE model and its various extensions have been realized recently . Apart from the use of BPP, PIE , and its various extensions, a few empirical equations have been used to explain the effects of the occurrence of IE at the ionic micellar surface. , …”

Section: Introductionmentioning

confidence: 99%

Kinetic Evidence for the Occurrence of Independent Ion-Exchange Processes in the Cationic Micellar-Mediated Reaction of Piperidine with Anionic Phenyl Salicylate

Khan

Ismail

2009

J. Phys. Chem. A

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A kinetic probe, which involves the determination of pseudo-first-order rate constants (k(obs)) for the nucleophilic reaction of piperidine (Pip) with ionized phenyl salicylate (S(-)) at constant [Pip](T) (= 0.1 M), [S(-)](T) (= 2 x 10(-4) M), [CTABr](T), < or = 0.10 M NaOH and varying concentration of MX (= 3-ClC(6)H(4)CO(2)Na and C(6)H(5)CH=CHCO(2)Na), gives the following information. The nonlinear plots of k(obs) versus [MX] reveal indirectly the occurrence of more than one independent ion-exchange processes at the CTABr micellar surface. These observed data fit to a kinetic relationship derived from an empirical equation coupled with pseudophase micellar (PM) model. This relationship gives an empirical constant (K(X/S)) that is used to determine the usual ion-exchange constant (K(X)(Y)). The values of K(X)(Br) (Y = Br) have been calculated for X = 3-ClC(6)H(4)CO(2)(-) and C(6)H(5)CH=CHCO(2)(-). More than 12-fold larger value of K(X)(Br) for X = 3-ClC(6)H(4)CO(2)(-) than that for X = 2-ClC(6)H(4)CO(2)(-) is attributed to the presence and absence of viscoelasticity in the respective presence of 3-ClC(6)H(4)CO(2)(-) and 2-ClC(6)H(4)CO(2)(-).

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A new empirical kinetic method for the determination of ion-exchange constants for the counterions of cationic micelles: The rate of piperidinolysis and hydrolysis of anionic phenyl salicylate as the kinetic probes

Khan

Ismail

Yusof

2010

Colloids and Surfaces A: Physicochemical and Engineering Aspect

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Interfacial ion exchange between monovalent and divalent anions in cationic micelles, revised in the light of correlation analysis

Cited by 4 publications

References 26 publications

Effects of [NaBr] on the Rate of Intramolecular General Base-Assisted Hydrolysis of N-(2′-Hydroxyphenyl)phthalimide in the Presence of Cationic Micelles: Kinetic Evidence for the Probable Micellar Structural Transition

Effects of [NaBr] on the Rate of Intramolecular General Base-Assisted Hydrolysis of N-(2′-Hydroxyphenyl)phthalimide in the Presence of Cationic Micelles: Kinetic Evidence for the Probable Micellar Structural Transition

Kinetic Evidence for the Occurrence of Independent Ion-Exchange Processes in the Cationic Micellar-Mediated Reaction of Piperidine with Anionic Phenyl Salicylate

A new empirical kinetic method for the determination of ion-exchange constants for the counterions of cationic micelles: The rate of piperidinolysis and hydrolysis of anionic phenyl salicylate as the kinetic probes

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