Liquid structure of acetic acid-water and trifluoroacetic acid-water mixtures studied by large-angle X-ray scattering and NMR

Article Abstract:

The investigation of the structures of acetic acid (AA), trifluoroacetic acid (TFA), and their aqueous mixtures over the entire range of acid mole fraction [x.sub.A] by large-angle X-ray scattering (LAXS) has shown that acetic acid molecules mainly form a chain structure via hydrogen bonding in the pure liquid.

Acetic Acid, Usage, Hydrogen bonding, Hydrogen bonds, Nuclear magnetic resonance, Chemical properties

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Salting-out effect induced by temperature cycling on a water/nonioninc surfactant/oil system

Article Abstract:

The original effects induced by temperature cycling on the transitional phase inversion of emulsions, which are stabilized by a nonionic polyethoxylated C18E6 surfactant model, are described. The study proposes novel and complementary insights into the phenomena governing the emulsion phase inversion.

Surface active agents, Surface Active Agent Manufacturing, Ethylene Oxide, Nonionic Surfactants, Analysis, Thermal properties, Electrical conductivity, Gibbs' free energy

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Second harmonic generation from oxazine dyes at the air/water interface

Article Abstract:

Steady-state second harmonic generation (SHG) studies are carried out for oxazine dyes at the air/water interface. The dyes readily aggregate in the bulk and the combined evidence from various types of SHG measurements indicate that the SHG arises from dimers.

Vinyl Chloride Monomer, Spectra, Monomers, Dimer acids

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