Concentration and temperature dependence of the counterion self-diffusion coefficient in aqueous solutions of hexadecyltrimethylammonium bromide

Smith, Duane H.

doi:10.1016/0021-9797(79)90259-5

Cited by 4 publications

(1 citation statement)

References 24 publications

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“…We find an apparent diffusion coefficient D app = 9 × 10 -8 cm 2 ·s -1 . Since the coefficient for free CTAB (3% w/w) is 6.6 × 10 -6 cm 2 ·s -1 , we can conclude that this reaction is not limited by diffusion of the monomer. The solution after mixing acts as a reservoir, which continuously feeds the micronic grains.…”

Section: Discussionmentioning

confidence: 73%

How Does ZrO₂/Surfactant Mesophase Nucleate? Formation Mechanism

et al. 2003

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In situ time-resolved small-angle X-ray and neutron scattering have been used to investigate the mechanism of a bulk precipitation of a hexagonally ordered ZrO2/surfactant mesophase. Using hexadecyltrimethylammonium bromide (CTAB) as a structure-directing agent, the precipitation results from the addition of sulfate to an oxychloride zirconium/CTAB water solution. The precipitate obtained after a few seconds is organized in a 2D hexagonal network. There is no preexisting cylindrical micelle in the precursor solution, and the micelles act as a reservoir for monomer to feed the building grain. The precipitation occurs through a two-step mechanism: a random nucleation/growing process and a first-order reorganization from locally ordered cylinders to a hexagonal lattice in the grain at its final size.

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Section: Discussionmentioning

confidence: 73%

How Does ZrO₂/Surfactant Mesophase Nucleate? Formation Mechanism

et al. 2003

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Effect of hexadecyltrimethylammonium bromide micelles on the hydrolysis of substituted benzoate esters

Correia¹,

Cuccovia²,

Chaimovich³

1991

J of Physical Organic Chem

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The alkaline hydrolysis of nine para‐substituted phenyl esters of para‐substituted benzoates was studied in the presence and absence of hexadecyltrimethylammonium bromide (CTAB) micelles. The second‐order rate constant for alkaline hydrolysis in CTAB micelles (K2m) was calculated using a pseudo‐phase ion‐exchange model. the substituent effect on the second‐order rate constant in the aqueous phase (k2w) and on k2m was analysed using Hammett's σ ρ plots. The calculated ρ values in micelles were 0.8 unit. larger than those in water. The effective low dielectric constant in the micellar surface may be responsible for the general effect of increasing the sensitivity of reactions to the electronic effect of substituents in micelles.

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Thermodynamic transformations of entangled bulky organic monomers with long alkyl chains

Sato

2023

Struct Chem

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Concentration and temperature dependence of the counterion self-diffusion coefficient in aqueous solutions of hexadecyltrimethylammonium bromide

Cited by 4 publications

References 24 publications

How Does ZrO₂/Surfactant Mesophase Nucleate? Formation Mechanism

How Does ZrO₂/Surfactant Mesophase Nucleate? Formation Mechanism

Effect of hexadecyltrimethylammonium bromide micelles on the hydrolysis of substituted benzoate esters

Thermodynamic transformations of entangled bulky organic monomers with long alkyl chains

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Concentration and temperature dependence of the counterion self-diffusion coefficient in aqueous solutions of hexadecyltrimethylammonium bromide

Cited by 4 publications

References 24 publications

How Does ZrO2/Surfactant Mesophase Nucleate? Formation Mechanism

How Does ZrO2/Surfactant Mesophase Nucleate? Formation Mechanism

Effect of hexadecyltrimethylammonium bromide micelles on the hydrolysis of substituted benzoate esters

Thermodynamic transformations of entangled bulky organic monomers with long alkyl chains

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Product

Resources

About

How Does ZrO₂/Surfactant Mesophase Nucleate? Formation Mechanism

How Does ZrO₂/Surfactant Mesophase Nucleate? Formation Mechanism