Abstracts » Chemicals, plastics and rubber industries

Effect of organic surfactant on femtosecond solvation dynamics at the air-water interface

Article Abstract:

The effect of a Langmuir monolayer of fatty acid on static solvation properties as well as femtosecond solvation dynamics at aplanar air-water interface is investigated using second harmonic generation as a surface-specific probe. The results demonstrate that the stearic acid monolayer induces significant changes in both static and dynamic solvation at the air-water interface.

Fatty Acids & Derivatives, Fatty acids, Solvation

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Femtosecond aqueous solvation at a positively charged surfactant/water interface

Article Abstract:

The effect of a positively charged dodecyl trimethylammonium bromide (DTAB) surfactant on the aqueous solvation of coumarin 314 (C314), a solvatochromic molecule, at the air/water interface was investigated. Steady-state and femtosecond time-resolved second harmonic generation (SHG) spectroscopy was employed as a surface-selective tool to characterize the solvation of C314.

All Other Basic Organic Chemical Manufacturing, Industrial organic chemicals, not elsewhere classified, Coumarin, Analysis, Coumarins, Bromides, Aqueous solution reactions, Bromides (Chemistry)

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Aqueous solvation dynamics at the anionic surfactant air/water interface

Article Abstract:

A study was conducted to investigate the effect of the negatively charged carboxylate group of the stearic acid surfactant CH(sub 3)(CH(sub 2))(sub 16)COO(super -) on the solvation at the surfactant air/water interface. It was found that the static solvation energetics appears to be relatively insensitive to the ionization state of the stearic acid surfactant.

Anionic Surfactants, Stearic Acid, Molecules

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