Electrochemical measurements on the binding of sodium dodecyl sulfate and dodecyltrimethylammonium bromide with .alpha.- and .beta.-cyclodextrins

Yunus, W. M. Z. Wan; Taylor, John A.; Bloor, D. M.; Hall, Denver G.; Wyn‐Jones, E.

doi:10.1021/j100201a052

Cited by 114 publications

(106 citation statements)

References 20 publications

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“…follows that the CD molecules can accommodate a chain with 10 methylene groups [337]. Therefore, in a crude picture, the carbon chain would be hidden inside the CD cavity to avoid unfavorable interactions with water but in a conformation which allows the bulky head groups to protrude out of the cavity and remain in the external aqueous environment.…”

mentioning

confidence: 99%

The formation of host–guest complexes between surfactants and cyclodextrins

Valente

Söderman

2014

Advances in Colloid and Interface Science

184

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Cyclodextrins are able to act as host molecules in supramolecular chemistry with applications ranging from pharmaceutics to detergency. Among guest molecules surfactants play an important role with both fundamental and practical applications. The formation of cyclodextrin/surfactant host-guest compounds leads to an increase in the critical micelle concentration and in the solubility of surfactants. The possibility of changing the balance between several intermolecular forces, and thus allowing the study of, e.g., dehydration and steric hindrance effects upon association, makes surfactants ideal guest molecules for fundamental studies. Therefore, these systems allow for obtaining a deep insight into the host-guest association mechanism. In this paper, we review the influence on the thermodynamic properties of CD-surfactant association by highlighting the effect of different surfactant architectures (single tail, double-tailed, gemini and bolaform), with special emphasis on cationic surfactants. This is complemented with an assessment of the most common analytical techniques used to follow the association process. The applied methods for computation of the association stoichiometry and stability constants are also reviewed and discussed; this is an important point since there are significant discrepancies and scattered data for similar systems in the literature.In general, the surfactant-cyclodextrin association is treated without reference to the kinetics of the process. However, there are several examples where the kinetics of the process can be investigated, in particular those where volumes of the CD cavity and surfactant (either the tail or in special cases the head group) are similar in magnitude.This will also be critically reviewed.

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confidence: 99%

The formation of host–guest complexes between surfactants and cyclodextrins

Valente

Söderman

2014

Advances in Colloid and Interface Science

184

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“…While the complexation of cyclodextrins with surfactant molecules at surfactant concentrations lower than the critical micelle concentration (CMC) has been reported in the literature [18,23,27,28], the effects of cyclodextrins at higher surfactant concentration have remained largely unexplored. Several key questions remain open: Do cyclodextrins affect the micelle size, shape, and inter-micelle interactions?…”

Section: Introductionmentioning

confidence: 99%

“…Because of the hydrophobic nature of the cavity of the CD molecules, the water-insoluble "tail" of a surfactant molecule may partition inside this cavity compared to the aqueous media. Depending upon the size of the CD cavity and the chemical nature of the surfactant, a variety of complexes may form, the stoichiometry of which, e.g., 1:1 (one CD molecule per one surfactant molecule), 2:1, etc., has been inferred on the basis of results from conductivity, electrochemical or other methods [18][19][20][21][22][23][24][25][26].…”

Section: Introductionmentioning

confidence: 99%

Self-assembly control via molecular recognition: Effect of cyclodextrins on surfactant micelle structure and interactions determined by SANS

Fajalia

Tsianou

2015

Colloids and Surfaces A: Physicochemical and Engineering Aspect

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“…Also in these systems the inclusion of surfactant monomers into the cavity of CDs must be considered [18][19][20]. For example, a binding constant of 21 000 L/mol was reported for SDS to b-CD [21]. It was shown that addition of CD to an SDS solution increases the critical micelle concentration (CMC) [18].…”

Section: Introductionmentioning

confidence: 99%

Effects of partial/asymmetrical filling of micelles and chiral selectors on capillary electrophoresis enantiomeric separation: Generation of a gradient

et al. 2004

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The effect of several experimental parameters on enantiomeric separations in micellar capillary electrophoresis (MCE) was studied. A model separation system was tested. It was composed of an acidic phosphate buffer with sodium dodecyl sulfate (SDS) and hydroxypropyl-beta-cyclodextrin (HP-beta-CD) as the chiral selector. A substituted angelicin was used as a chiral analyte. Changes in the concentration of SDS micelles/SDS monomers in the presence of HP-beta-CD and their impact on the enantioselective separation were investigated. Variation of the composition of electrolytes in the individual compartments of the separation system (inlet vial, capillary, and outlet vial) affected both the migration times and the resolution of the enantiomers. Current vs. time dependencies also were monitored during the separations. A mathematical model of electromigration in micellar systems with chiral selector present was proposed and a computer simulation was used to explain the observed phenomena and to confirm the generation of a CD/SDS-micelle concentration gradient under certain experimental conditions. This is the reported first attempt of a computer simulation of the complex, dynamic chiral environment of the CD-SDS-MCE system.

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Electrochemical measurements on the binding of sodium dodecyl sulfate and dodecyltrimethylammonium bromide with .alpha.- and .beta.-cyclodextrins

Cited by 114 publications

References 20 publications

The formation of host–guest complexes between surfactants and cyclodextrins

The formation of host–guest complexes between surfactants and cyclodextrins

Self-assembly control via molecular recognition: Effect of cyclodextrins on surfactant micelle structure and interactions determined by SANS

Effects of partial/asymmetrical filling of micelles and chiral selectors on capillary electrophoresis enantiomeric separation: Generation of a gradient

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