Interaction of ranked copper phthalocyanine films with dry nitrogen dioxide on the basis of ESR data

The calculation procedure of the orientation distribution of molecules by the angular dependence of electron spin resonance (ESR) spectra was used to study copper(II) phthalocyanine (CuPc) films of different thickness, obtained by the molecular complex deposition on flat quartz plates. In the first stage of the deposition, the formation of the layer of the α-phase of CuPc with the predominant orientation of molecular stacks (theb-axis of the crystalline lattice) along the plate surface was formed. In the second stage, the layer with the normal disposition of molecular stacks is condensed over the first layer. The copper binuclear associates were formed during the reaction of CuPc with NO₂. The ESR spectra analysis allows us to make an assumption about the construction of associates and to calculate the distance between paramagnetic copper(II) ions. It was shown that the orientation distribution of axially symmetric CuPc associates in the film depends both on the initial film order and the conditions under which it was treated.