Orientational binding of substituted naphthoate counterions to the tetradecyltrimethylammonium bromide micellar interface

Bachofer, Steven J.; Simonis, Ursula; Nowicki, Thomas

doi:10.1021/j100154a084

Cited by 69 publications

(86 citation statements)

References 7 publications

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“…NMR spectroscopy [16] has revealed that when C , 1 4C !2 (R"C 1 /C " 41), almost all NaSal dissociate and Sal\ ions form complexes with CTA> to form thread-like micelles. Salicylate inserts its benzene ring into the hydrophobic part of the micelle as an intercalation of the salicylate between RTA> molecules [9,17,18]. For tosylate, Bunton et al [19] found that the viscosity of a solution of CTAB increases very markedly when NaTos is added.…”

Section: Introductionmentioning

confidence: 99%

Occurrence of shear thickening in aqueous micellar solutions of CTAB with some added organic counterions

Hartmann¹,

Cressely²

1998

Colloid & Polymer Science

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V. Hartmann ) Prof. R. Cressely ( ) Laboratoire de Physique des Liquides et des interfaces Groupe Rhe´ophysique des Colloides Universite´de Metz -1Bd F. AragoAbstract In this experimental work we carefully investigate the influence of some organic counterions (having similarities): sodium salicylate (NaSal), sodium tosylate (NaTos) and sodium benzoate (NaBz) on the rheological properties of two aqueous solutions (0.1 and 0.05 M) of cetyltrimethylammonium bromide (CTAB). Here we are particularly interested in the occurrence of the shear thickening effect corresponding to shear induced structures (SIS). All the rheological measurements presented in this work are realized with the same geometrical device (plan-cone) with controlled imposed shear stress. Conditions of occurrence and evolutions of the characteristics of the obtained shear thickening are given.

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Section: Introductionmentioning

confidence: 99%

Occurrence of shear thickening in aqueous micellar solutions of CTAB with some added organic counterions

Hartmann¹,

Cressely²

1998

Colloid & Polymer Science

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“…In CTAB medium, the order of preference for ring closure of medium membered rings vs. large membered rings can be reversed. 24 It is also known that GSH binds the CTAB micelle surface 25 due to favorable electrostatic interactions between carboxylate and ammonium moieties (Scheme 7).We thus reasoned that a more planar dye such as 8 may bind more tightly in the micelle 26 thereby facilitating large ring closure and selective detection of GSH. …”

Section: The Role Of Surfactantsmentioning

confidence: 99%

Fluorescence Detection of Biological Thiols

Guo¹

2000

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Glutathione (GSH) performs significant biological functions such as serving as an antioxidant. It protects cells from oxidative stress by trapping free radicals that damage DNA and RNA. 1 It also has an important role in maintaining the reducing environment in cells. 2 The rapid, sensitive and highly selective detection of GSH is of importance for investigating its function in disease and in disease diagnosis. We have found that in cetyl trimethylammonium bromide (CTAB) medium, a resorufinbased probe shows an instantaneous, highly selective response to GSH. ii ACKNOWLEDGEMENTS I would like to take this opportunity to express my sincerest thanks to my research advisor, Dr. Robert M. Strongin, for giving me the opportunity to conduct research in Strongin group. Thanks for your expertise, guidance, patience, and humor. Also, thanks for setting up a great model on how to work hard to achieve our goals.

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“…Structural information about ordinary threadlike micelles [44,45] has been obtained using nuclear magnetic resonance (NMR) spectroscopy [12][13][14] , transmission electron microscopy (TEM), and various kinds of scattering techniques. TEM of hybrid threadlike micelles has also confirmed that hybrid threadlike micelles possess a threadlike shape that is long enough to entangle one another, as seen in ordinary threadlike micellar systems.…”

Section: Structure Of Hybrid Threadlike Micellesmentioning

confidence: 99%

“…This intercalation of the hydrophobic additive ions strongly promotes the transition of the micellar shape from spherical to threadlike, as seen in Scheme 1 a. [12][13][14] If one constructs hybrid threadlike micelles consisting of surfactants and polymer molecules instead of the low-molecularweight additive salts described above, the viscoelastic properties of the hybrid threadlike micellar solutions become more pronounced, giving them great potential for new applications as strong rheology modifiers or excellent viscoelastic materials in aqueous media. The structure of hybrid threadlike micelles is probably the same as that of polymerized threadlike micelles.…”

Section: Introductionmentioning

confidence: 99%

Formation and Physicochemical Features of Hybrid Threadlike Micelles in Aqueous Solution

Nakamura

Shikata

2007

ChemPhysChem

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We investigate the construction of long, stable hybrid threadlike micelles consisting of polyelectrolytes and oppositely charged surfactants in aqueous solution and examine the physicochemical features such as their structure and viscoelastic behavior in aqueous solution. The most important point for their construction is the careful control of interactions, especially electrostatic interactions, caused between the surfactants and polyelectrolytes. Incorporated polyelectrolytes are fully extended in these hybrid threadlike micelles irrespective of the molecular weight of the polymer. The viscoelastic behavior of the hybrid threadlike micellar solution is similar to that of ordinary threadlike micellar systems consisting of low-molecular-weight substances. However, the inclusion of polymers in the micelles causes differences in their mechanical properties.

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Orientational binding of substituted naphthoate counterions to the tetradecyltrimethylammonium bromide micellar interface

Cited by 69 publications

References 7 publications

Occurrence of shear thickening in aqueous micellar solutions of CTAB with some added organic counterions

Occurrence of shear thickening in aqueous micellar solutions of CTAB with some added organic counterions

Fluorescence Detection of Biological Thiols

Formation and Physicochemical Features of Hybrid Threadlike Micelles in Aqueous Solution

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