Donor-acceptor interactions at interfaces

Abstract

The free energy change per unit area on separating an interface (the work of adhesion, Wa) is composed of a variety of interactions: [formula omitted] where superscripts are d for London dispersion forces, h for hydrogen-bonding, ab for acid-base interaction, p for dipole-dipole interaction, and i for induced dipole-dipole interaction. The work of cohesion can be similarly separated into components of surface tension(γd,γh,γab,γp,γt). The success of predicting Wad by [formula omitted] as derived from London force theory, has led others to propose that [formula omitted] etc. However, there is no theoretical basis for the latter and we see that present experimental data indicate rather clearly that at a solid-liquid interface Wah is directly proportional to ylk: Wah=Kγlk. © 1972, Taylor & Francis Group, LLC. All rights reserved.