Surface monolayers and aqueous bilayers of single-chain ammonium amphiphiles which contain benzylideneaniline and salicylideneaniline units

Article abstract of DOI:10.1002/recl.19941130407

The assembling properties of single-chain ammonium amphiphiles containing benzylideneaniline and salicylideneaniline units as rigid segments in the formation of aqueous bilayers, cast multi-bilayers, and surface monolayers were studied.Electron microscopy indicated that aggregate morphologies observed in water, such as vesicles and fibers, were dependent on the nature of the aromatic unit and the alkyl-chain length of the component amphiphiles.The patterns of molecular assembly in bilayers were examined by absorption spectroscopy of aqueous bilayers and X-ray diffraction of cast multi-bilayer films.The patterns were virtually identical to those of the corresponding azobenzene bilayers, and commonly determined by combinations of alkyl-chain lengths.This alkyl-chain combination was crucial for formation of stable surface monolayers.