Study of the micelle formation and the effect of additives on this process in reversed micellar systems by positron annihilation techniques

Jean, Y. C.; Ache, Hans J.

doi:10.1021/ja00488a004

Cited by 74 publications

(34 citation statements)

References 15 publications

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“…W 0 Ç 9). These results successfully demonstrate the effect of different ratios of mixed solvents on the microphase change and the formation of w/o ME (26).…”

Section: Water-tx-100-butanol-n-heptane Systemsupporting

confidence: 62%

See 1 more Smart Citation

Reverse Micelle Formation of Triton X-100 in Butanol andn-Heptane Mixed Solvents Studied by the Positron Annihilation Technique

Das

Ganguly

1997

Journal of Colloid and Interface Science

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“…W 0 Ç 9). These results successfully demonstrate the effect of different ratios of mixed solvents on the microphase change and the formation of w/o ME (26).…”

Section: Water-tx-100-butanol-n-heptane Systemsupporting

confidence: 62%

“…BuHp, the break in the curve has been detected at a slightly lower value of W 0 Ç 9. Such profound changes can be hances the polarity of the micellar aggregates and leads to attributed to solvent effects ( 26 ) .…”

Section: Water-tx-100-butanol-n-heptane Systemmentioning

confidence: 99%

Reverse Micelle Formation of Triton X-100 in Butanol andn-Heptane Mixed Solvents Studied by the Positron Annihilation Technique

Das

Ganguly

1997

Journal of Colloid and Interface Science

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“…Therefore any studies referring to the reverse micelle of AOT-hexane must take into account the possibility of AOT competing with a probe or a solute for a given acceptor. This effect may not be at all important for reverse micelles of AOT-benzene (31). The stability of the TCNE-AOT complex is higher in homogeneous media (at [AOTIo < CMC) than in the micellar domain.…”

Section: Discussionmentioning

confidence: 94%

Interaction between tetracyanoethylene and naphthalene in reverse micelles of AOT in n-hexane. The electron-donor properties of AOT

Biasutti¹,

Silber²

1996

Can. J. Chem.

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Abstract:The electron donor-acceptor (EDA) interaction between TCNE and naphthalene (Naph) in rz-hexane and reverse micelles of AOT in n-hexane was studied by UV-visible spectroscopy with the aim of determining the influence of the micellar media on the EDA interaction. The spectra of the mixtures of TCNE-Naph in 11-hexane show two typical maxima at 418 and 534 nm, assigned to the formation of a T-IT EDA complex. In the micellar media a new band is observed at 398 nm. When the spectra of TCNE in 11-hexane are studied in the presence of AOT two new bands at 398 and 4 18 nm are detected. These bands are consistent with an EDA interaction between TCNE and AOT as 11-donor. The stability constants of this interaction were calculated for AOT concentrations below the CMC and in the micellar media at differentThe results give evidence of the tendency of AOT to interact very strongly with electron acceptors. Moreover, in the system TCNE-Naph in the micellar media it is shown that Naph and AOT compete to form a complex with TCNE. The formation constants of the complexes of AOT-Naph in the micelle system were determined at W = 0 and 5. Despite the competition of AOT for TCNE the stability constant for the complex TCNE-Naph is higher than in homogeneous media, probably due to the high local concentration of the acceptor in the micelle.Key rvords : reverse micelles, aerosol-OT, tetracyanoethylene, naphthalene, electron donor-acceptor complexes. De plus, on a montrC que, dans le systkme TCNE-Naph en milieu micellaire, Naph et AOT sont en competition pour former un complexe avec TCNE. On a determink les constantes de formation des complexes AOT-Naph W = 0 et 5. MalgrC la compCtition de AOT pour TCNE, la constante de stabilitC pour le complexe TCNE-Naph est plus ClevCe dans le milieu homogkne, probablement en raison de la concentration locale plus ClevCe de I'accepteur dans la micelle.

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“…In this paper, the micelle and microemulsions with AOT being the surfactant and isooctane being the oil and the molar ratios R being 2, 8,10,12,16,18,20,25,30, and 40 were investigated by density measurements at 303.15 K. We choose AOT as the surfactant in this study not only for its wide practical applications 20−23 but also for the large amount of information about it accumulated in the previous extensive studies. 24−27 The apparent specific volumes of AOT in the reverse micelle and the quasi-component water/AOT in the microemulsions with different R at various concentrations are deduced from the density data and used to examine the volumetric properties of the surfactant and water both in the droplets and in the continuous phase, to discuss the droplet interaction, and to determine the critical micelle or microemulsion concentrations.…”

Section: Introductionmentioning

confidence: 99%

Volumetric Properties of Water/AOT/Isooctane Microemulsions

Yin

2014

Langmuir

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The densities of AOT/isooctane micelles and water/AOT/isooctane microemulsions with the molar ratios R of water to AOT being 2, 8, 10, 12, 16, 18, 20, 25, 30, and 40 were measured at 303.15 K. The apparent specific volumes of AOT and the quasi-component water/AOT at various concentrations were calculated and used to estimate the volumetric properties of AOT and water in the droplets and in the continuous oil phase, to discuss the interaction between the droplets, and to determine the critical micelle concentration and the critical microemulsion concentrations. A thermodynamic model was proposed to analysis the stability boundary of the microemulsion droplets, which confirms the maximum value of R being about 65 for the stable AOT/water/isooctane microemulsion droplets.

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Study of the micelle formation and the effect of additives on this process in reversed micellar systems by positron annihilation techniques

Cited by 74 publications

References 15 publications

Reverse Micelle Formation of Triton X-100 in Butanol andn-Heptane Mixed Solvents Studied by the Positron Annihilation Technique

Reverse Micelle Formation of Triton X-100 in Butanol andn-Heptane Mixed Solvents Studied by the Positron Annihilation Technique

Interaction between tetracyanoethylene and naphthalene in reverse micelles of AOT in n-hexane. The electron-donor properties of AOT

Volumetric Properties of Water/AOT/Isooctane Microemulsions

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