Distribution equilibria in a micellar solution system

Tosch, William C.; Jones, Scott; Adamson, Arthur W.

doi:10.1016/0021-9797(69)90173-8

Cited by 41 publications

(8 citation statements)

References 16 publications

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“…High microviscosities in the hemimicelles as reported by us earlier also corroborate this observation. 13 A further look at Figure 2 shows that the shifted emission spectra in micellar and hemimicellar cases exhibit a broad shoulder at ~678 nm. Such a distortion may be considered as a manifestation of the immobilization of the probe in surfactant aggregates.…”

Section: Resultsmentioning

confidence: 97%

A luminescence quenching study on the localization problem of tris(2,2'-bipyridyl)ruthenium(2+) in micelles and hemimicelles

Kunjappu¹,

Somasundaran²,

Turro³

1990

J. Phys. Chem.

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Quenching studies on the luminescence emission of Ru(bpy),*+ with ferrocyanide ion, 9-methylanthracene, and doxylstearic acids have been carried out in hemimicellar and micellar aggregates to gain insight into the location of this Raman and luminescence probe. Ru(bpy),*+ is bound to a more nonpolar hemimicellar hydrophobic region as evidenced from the observed larger Stokes shift in this case than in the case of a micellar environment. Stern-Volmer constants for the doxylstearic acid quenching of R~(bpy),~+ luminescence in micelles indicated that the optical electron in the MLCT state of the probe molecule resides in a bipyridyl ring which appears to be close to position 7 of the stearic acid chain.

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Section: Resultsmentioning

confidence: 97%

A luminescence quenching study on the localization problem of tris(2,2'-bipyridyl)ruthenium(2+) in micelles and hemimicelles

Kunjappu¹,

Somasundaran²,

Turro³

1990

J. Phys. Chem.

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“…It has been shown recently to be quite a complex issue [43]. Moreover, the electrolyte concentration has been found to be slightly different in the microemulsion and excess phases, because of the partitioning of salts [44][45][46], though this is usually neglected for the sake of simplicity. Fortunately, the effect…”

Section: Empirical Correlations To Attain Optimum Formulationmentioning

confidence: 99%

How to Attain Ultralow Interfacial Tension and Three‐Phase Behavior with Surfactant Formulation for Enhanced Oil Recovery: A Review. Part 1. Optimum Formulation for Simple Surfactant–Oil–Water Ternary Systems

Salager

Forgiarini

Bullón

2013

J Surfact & Detergents

188

234

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Enhanced recovery of crude oil by surfactant flooding requires the attainment of an ultralow interfacial tension. Since Winsor's work in the 1950s it has been known that a minimum interfacial tension and a concomitant three‐phase behavior of a surfactant–oil–water system occurs when the interactions of the surfactant and the oil and water phases are exactly equal. It has been known since the 1970s that these conditions are attained when a linear correlation is satisfied between the formulation variables, which are characteristic parameters of the substances as well as the temperature. This first part of our review on how to attain ultralow interfacial tension for enhanced oil recovery shows how formulation scan techniques using these correlations are used to determine an optimum formulation and to characterize unknown surfactants and oils. The physicochemical significance of the original empirical correlation is reported as the surfactant affinity difference or hydrophilic–lipophilic deviation model. We report the range of accurate validity of, and how to test, this simple model with four variables.

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“…Cetyltrimethylammonium chloride (CTAC) was pL-c' ased from Eastman Kodak Co. as a dry chemical and was obtained as a 29 % aqueous solution (Arquad [16][17][18][19][20][21][22][23][24][25][26][27][28][29] from Akzo Chemie America.. Borate buffer (0.03 M) was added to the aqueous CTAC solution before use. The cosurfactants, tetramo t hylammcnium chloride (TMACI), tetraethylammonium chloride (TEACI), tetra-ni -propylammonium chloride (TPrACI), tetra-n -butylammonium chloride (TBACI) and bromide (TBABr), tetra-n -pentyl ammonium bromide (TPABr), tetra-n -hexylammonium chloride (THACI) and bromide (THABr), tetra-n -octylammonium bromide (TOABr) and Adogen® 464 (Ad) were purchased from Eastman Kodak and Aldrich Chemical companies.…”

Section: Methodsmentioning

confidence: 99%

“…The applicability of T(r) for predicting sites and relative reactivities for electrophilic attack in aromatic systems has recently been demonstrated. 29 …”

Section: Average Local Ionization Energiesmentioning

confidence: 99%

Proceedings of the U.S. Army Chemical Research, Development and Engineering Center Scientific Conference on Chemical Defense Research Held in Aberdeen Proving Ground, Maryland on 14-17 November 1989

Williams¹

1990

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Distribution equilibria in a micellar solution system

Cited by 41 publications

References 16 publications

A luminescence quenching study on the localization problem of tris(2,2'-bipyridyl)ruthenium(2+) in micelles and hemimicelles

A luminescence quenching study on the localization problem of tris(2,2'-bipyridyl)ruthenium(2+) in micelles and hemimicelles

How to Attain Ultralow Interfacial Tension and Three‐Phase Behavior with Surfactant Formulation for Enhanced Oil Recovery: A Review. Part 1. Optimum Formulation for Simple Surfactant–Oil–Water Ternary Systems

Proceedings of the U.S. Army Chemical Research, Development and Engineering Center Scientific Conference on Chemical Defense Research Held in Aberdeen Proving Ground, Maryland on 14-17 November 1989

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