Hydrogen-bonded monolayers and interdigitated multilayers at the air-water interface

Article Abstract:

Crystalline monolayers of octadecylsulfonate amphiphiles (C18S) separated by hydrophilic guanidinium (G) spacer molecules are formed at the air-water interface coverage that is consistent with that expected for a fully condensed monolayer self-assembled by hydrogen bonding between the G ions and the sulfonate groups. The grazing incidence X-ray diffraction (GIXD) data has indicated that the transformation to the multilayer phase is sluggish, which is consistent with kinetic limitations expected for the conversion of a crystalline monolayer to a crystalline multilayer.

Hydrogen bonding, Hydrogen bonds

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Effect of the addition of polyelectrolytes on monolayers of carboxybetaines

Article Abstract:

The effect of the addition of sodium poly(styrene sulffonate) polymers on the properties of monolayers formed by the adsorption of two carboxybetaines is examined. The behavior of the dilational elasticity and viscosity is described by relaxation that has involved molecular reorientation within the adsorbed layer.

Analysis, Viscoelasticity, Mechanical properties, Carboxyl compounds

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