SURFACE-POTENTIAL STUDIES OF MONOLAYERS OF SURFACTANT DONOR AND ACCEPTOR MOLECULES

The surface potential technique was used for investigation of donor, a cceptor and mixed monolayers, containing molecules suitable for deposi tion of conducting LB films. It is shown that the donor and acceptor m onolayers are neutral at the air-water interface. Big positive values of surface potential in the case of donor molecules are explained by p eculiarities of dipole depolarization near the surface of the water an d by charge transfer salt formation with water-soluble impurities. The dipole moment arising due to charge transfer between donor and accept or molecules in mixed monolayers is parallel to the layer plane. Other details of charge transfer complexes or salt formation in the mixed m onolayers are discussed.