Molecular interaction in monolayers III. Complex formation in lipoid monolayers

Abstract

In Parts I and II (Schulman and Rideal 1937) it was shown that on injection into the substrate beneath a uniform coherent monolayer of substances in minute quantities, one of two distinct types of interaction could be observed. In one case the injected molecules penetrated the surface film to form a mixed equimolecular monolayer, in the other the injected molecules were adsorbed on to the film to form a double layer, in some cases very rigid or tanned skins being formed by cross-linking. It appeared that in the former case equimolecular complexes were formed between the associating molecules, the term “complex” being used to designate a combination of measurable stability in stoichiometric ratio between the two reactants