Stoichiometry of the CT complex crystallites in polymer films

Abstract

The stoichiometry of the charge transfer (CT) complex which crystallised in a polymer solution during film casting has been studied by a spectrophotometric method. It was found that the donor-to-acceptor molar ratio changes from 1:2 to 1:1 and even more, depending on the film casting conditions. The composition of the CT complex crystals is also related to the morphology of the crystallites formed which strongly influence the properties of the doped films.