Optical and electrical properties of inverted emulsions based on sodium bis(2-ethylhexyl) sulfosuccinate containing cadmium sulfide particles

The optical and electrical properties of inverted emulsions based on sodium bis(2-ethylhexyl) sulfosuccinate (AOT) containing nanoparticles of cadmium sulfide are studied. The particle size of the synthesized samples is determined from UV spectroscopy data. The state of solubilized water in invert emulsions is found to change in the presence of cadmium sulfide due to the formation of aqua complexes. The shape of AOT micelles and the structures formed by drying the invert AOT emulsions are shown to be affected by the degree of hydration and the solubilization of CdS particles.     

Dimensions and Orientation of Triton X-100 Micelles in Aqueous Solutions,According to Turbidimetric Data

Russian Journal of Physical Chemistry A - The size and orientation of micelles of nonionic surfactant Triton X-100 in aqueous solutions is determined turbidimetrically. It is shown that micelles...     

Morphology,Size, and Properties of Micelles in Polyethylene Glycol Mono-p-(1,1,3,3-tetramethylbutyl)phenyl Ether (Triton X-100) Emulsions

Russian Journal of Physical Chemistry A - The morphology of micelles of the Triton X-100 nonionic surfactant (NS) in aqueous emulsions was studied by optical microscopy and turbidimetry, and the...     

Integral physicochemical properties of reverse micelles of sodium bis(2-ethylhexyl) sulfosuccinate (AOT)

The effect the degree of hydration has on optical and electrophysical properties of water/AOT/n-hexane system is studied. It is found that AOT reverse micelles form aggregates whose dimensions grow along with the degree of hydration and temperature. Aggregation enhances their electrical conductivity and shifts the UV spectrum of AOT reverse emulsions to the red region. Four states of water are found in the structure of AOT reverse micelles.     

X-ray powder diffraction and electron microscopic studies of the ZnTe-CdSe system

Substitutional solid solutions in the ZnTe-CdSe system were synthesized by isothermal diffusion. Within the composition range 100-68 mol % ZnTe, they crystallize in the cubic sphalerite structure; and at ZnTe contents below 26 mol %, in the wurtzite hexagonal structure. The cubic-to-hexagonal structure transition occurs within the composition range 26–68 mol % ZnTe. The atomic concentrations of chemical elements on the oxidized surface of grains of the solid solutions and in their bulk differ. X-ray powder diffraction and electron microscopic studies showed that, with decreasing specific geometric surface area of grains, the average sizes of coherent scattering regions increase.     

Concentration dependences of the physicochemical properties of a water–acetone system

Concentration dependences of the UV spectrum, refractive index, specific electrical conductivity, boiling point, pH, surface tension, and heats of dissolution of a water–acetone system on the amount of acetone in the water are studied. It is found that the reversible protolytic interaction of the components occurs in all such solutions, resulting in the formation of hydroxyl and acetonium ions. It is shown that shifts of the equilibrium between the molecules and ions in the solution leads to extreme changes in their electrical properties. It is concluded that the formation of acetone solutions of water is accompanied by heat absorption, while the formation of aqueous solutions of acetone is accompanied by heat release.     

Quantum-chemical simulation of the synthesis of structural fragments of humic substances analogs

Semiempirical calculations by the PM3 method were used to optimize the structural fragments of the precursors of synthetic humic and fulvic acids. Changes in the thermodynamic parameters (enthalpy of formation, entropy, and Gibbs energy) were determined and a conclusion was drowm if the postulated processes are thermodynamically possible.