Polymorphism and molecular metal phthalocyanine complexes

Abstract

Generalized data and new results characterizing the molecular metal phthalocyanine complexes with electron-donor and π-π-complexing agents are presented. It is shown that the crystalline packing of pseudopolymorphs formed by molecular complexes of metal phthalocyanine: ligand = 1: 2 is similar to the packing of molecules of metal phthalocyanine in the β-polymorphic form, while the molecular complex (1: 1) shows similarity to the α-polymorph. The topography of films based on axial and π-π complexes Zn(tert-Bu)4Pc is evaluated. It is shown that the surface of films based on biligand complexes is generally smooth, flat, and dense, although there are some rather large crystallites. The topography of the films is not regular, because the π-stacking axis of the pseudopolymorphs of β-crystallites is situated perpendicularly to the substrate. Films obtained on the basis of monoligand complexes are layered; the layers are perpendicular to the substrate, and the topography of the film is regular, because the π-stacking axis of the pseudopolymorphs of α-crystallites is parallel to the quartz substrate. An alternative way to obtain metal phthalocyanines of a given polymorphic modification is discussed.