Micellar extraction of europium (III) by a bolaform extractant and parent compounds derived from 5-pyrazolone

Hébrant, Marc; Provin, Christophe; Brunette, J.P.; Tondre, C.

doi:10.1016/s0927-7757(00)00798-6

Cited by 27 publications

(23 citation statements)

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“…Other applications include antifoaming agent in fermentation processes [317], metal and dye removal, either acting as an anchor [318][319][320] or by micellar extraction [321], formation of photosensitive structures [322][323][324] and the development of stimulus responsive gels [325,326]. Furthermore, bolaform surfactants are also relevant for biochemistry and pharmaceutical applications, by modeling lipid membranes [327][328][329], as permeability enhancers [330] or to be used for drugs encapsulation [331], respectively.…”

Section: Bolaform Surfactantsmentioning

confidence: 99%

The formation of host–guest complexes between surfactants and cyclodextrins

Valente

Söderman

2014

Advances in Colloid and Interface Science

178

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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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Section: Bolaform Surfactantsmentioning

confidence: 99%

The formation of host–guest complexes between surfactants and cyclodextrins

Valente

Söderman

2014

Advances in Colloid and Interface Science

178

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“…This pattern seems very likely in systems where both partners bear opposite charge. On the (18) 0.56 0.50 AMPS co (20) 0.42 0.32 AMPS co (26) 0 (20) 0.32 0.10 -AMPS co (30) 0.25 0.07 -other hand, as the polyelectrolyte contains hydrophobic groups anchored along the backbone, the association with CTAB may arise mainly from hydrophobic interactions. Figure 5 shows the change of fluorescence emission versus the logarithm of the copolymer AMPS co (11) concentration, at a fixed CTAB concentration (0.04 g/L).…”

Section: Microdomain Formation Of Amphiphilic Copolymers Amps Co In Wmentioning

confidence: 99%

“…Surfactant role, which is one of the key features of the process, was investigated. Several authors [16][17][18] have investigated this micellemediated separation method using low-molecularweight conventional surfactants, i.e., sodium dodecyl sulfate (SDS), while the use of polymeric surfactants has been restricted, mainly to polyethylenglycol type nonionic surfactants. 19 Therefore, an exploratory study using hydrophobically modified poly-AMPS as surfactants has been carried out.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and association properties in water solution of random copolymers of 2‐acrylamido‐2‐methyl‐1‐propane sulfonic acid and isodecyl methacrylate—potential application as surfactants in micellar‐enhanced ultrafiltration processes

Peinado

Catalina

Miguel

2007

J of Applied Polymer Sci

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: Synthesis and association properties in water solution of random copolymers of 2-acrylamido-2-methyl-1-propane sulfonic acid and isodecyl methacrylate-potential application as surfactants in micellar-enhanced ultrafiltration processes. Fluorescence spectroscopy was used to further confirm the copolymers self-aggregate in water. Critical concentration of the self-aggregate formation (CAC) decreased by increasing the molar fraction of iDMA in the AMPS co copolymers and varied between 1.20 and 0.04 g/L depending on the degree of hydrophobic modification. Hence, copolymer composition and charge density allowed tuning the pseudomicellar characteristics of these new amphiphilic copolymers. The addition of a salt or a low-molecular-weight surfactant was studied. Binding of CTAB to the AMPS co copolymers leads to a high decrease of CAC, i.e., 0.006 g/L. Effect of the composition in the viscosimetric behavior of the hydrophobically modified copolymers AMPS co was investigated. The removal of single metal ions, Cu 21 , and m-cresol from aqueous solutions by ultrafiltration with the help of the copolymers was investigated. Equilibrium dialysis experiments demonstrate that the formation of hydrophobic microdomains can be used to control the sequestration of foulants, and thus these novel copolymers have potential application as polymeric surfactants in micellar-enhanced ultrafiltration processes for water purification. Journal of Applied Polymer

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“…celle concentration (cmc) pass through the membrane. Micelles can also bind ions by electrostatic interaction or by solubilization of their neutral complexes (18)(19)(20)(21).…”

Section: Introductionmentioning

confidence: 99%