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Thin films (45 – 1200 nm thickness) of polymeric phthalocyanines were prepared by the reaction of copper films on various carriers with gaseous aromatic tetracarbonitriles. The films were characterized by IR, UV/VIS, and ESCA spectra. The electrical conductivity is in the order of 10−2‐10−5 S cm−1. The electrochemical activity of the films on graphite was studied in acid and alkaline electrolyte. The films exhibit rapid reduction and reoxidation. The pH dependence corresponds to that of the hydrogen electrode approximately.

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The ternary compound LiInTe2, synthesized by direct reaction of the elemental components, crystallizes in the tetragonal chalcopyrite structure (space group I42d) with lattice parameters a = 0.6419(2) and c = 1.2486(3) nm. LiInTe2 remains in the chalcopyrite structure up to the melting temperature of (935 ± 5) K. Infrared reflectance spectra measured in the wavenumber range from 40 to 4000 cm−1 yield two infrared active optical modes. An analysis of the mode frequencies in terms of the Keating model shows that the LiTe bond is considerably weaker than the InTe bond.

The electrochemical properties of solid films of 3,9,10,16,17,23, Zn(II), Cu(II)] were studied by cyclic voltammetry in aqueous electrolytes. The thin (10-100 rim) film electrodes show remarkably stable electrochromic redox behavior, and the charge exchanged in the cathodic and anodic waves, respectively, was found to be between 2 and 3 F/tool for scan rates up to 400 mV/s. For charge compensation, the intercalation of cations is required. At low pH values (intercalation of protons), nernstian behavior was observed, while in alkaline solutions the intercalation of the cations LP, Na t, or K ~ into the solid film was found to be the rate-determining step. From the halfwidth of the current waves, the number of electrons involved in the overall reaction was inferred and found to be different in acid and alkaline solutions. Compared to unsubstituted phthalocyanines 1, the characteristic qualities of the electrodes are associated with the high electric conductivity of 2 and the electron accepting properties of the substituents of the ligand.

Thin films containing 1 -100 pg 2,3,9,10,16,17,23,24-phthalocyanineoctacarbonitrile (1) and 10 -100 pg poly(N4nylcarbazole) (2) resp. the polyimide 3 were prepared on gold substrates through casting from solution. Smooth green coloured films were obtained. According to VIS spectra molecules of 1 are aggregated within the polymer matrices. Cyclic voltammetric measurements were carried out in 0,s M sulfuric acid. Mixed films of 1 and 2 show remarkably stable electrochromic redox behaviour and the charge exchanged in the cathodic and anodic wave, respectively, was found to be between 2,3 and 2,7 F/mol for scan rates up to 400 mV . s -. For mixed films of 1 and 3 with lower amount of 1 or increasing layer thickness the reduction and reoxidation appears to be a diffusion controlled process. a) Part 10: cf.'), part 11: cf.").