PROPERTIES OF MONOLAYERS OF OMEGAMONOHALOGENATED FATTY ACIDS AND ALCOHOLS ABSORBED ON WATER.
Abstract
Relations between force and area, surface potential and area, and surface dipole moment and area for omegamonohalogenated compounds spread as monolayers on aqueous substrates were studied at various pH values in the absence or presence of multivalent ions. The compounds investigated were omega-monosubstituted bromo-, chloro-, and iodohexadecanoic acids, bromooctadecanoic acid, and fluorooctadecanol, along with their corresponding unsubstituted compounds. Mechanical properties of the substituted and unsubstituted alcohols were essentially the same and were not influenced by changes in pH or the presence of multivalent ions in the substrate. The change in surface potential of each substituted acid film was larger than that of any unsubstituted acid and showed the dipole orientation to be in the opposite direction. The vertical components of the apparent dipole moment were computed from the film potentials by use of the Helmholtz equation. The results are discussed in terms of orientation and packing of the terminal polar groups and the resulting laterally induced polarization. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 12, 1964
- Accession Number
- AD0603310
Entities
People
- Marianne K. Bernett
- N. L. Jarvis
- William A. Zisman
Organizations
- United States Naval Research Laboratory