Polymere organische Metallkomplexe als organische Leiter

Abstract

After a short introduction into the field of organic conductors giving as examples stacked charge-transfer complexes and doped polyenes, polymeric macrocyclic metal complexes as organic conductors are discussed in more detail: Beside iodine doped phthalo- cyaninato-IVB-metalloxanes [R₄PcMO]_n (R = H, tBu) which show conductivities up to 1.4 S.cm^-1, the synthesis and characterization of polymeric macrocyclic transition metal complexes shown in fig. 4 with M = Fe, Co and Ru are described. The stacked arrangement of such polymers is achieved by bridging ligands L which can be linked to the central transition metal atom e.g. by two coordinative bonds (type b-polymer) or by one coordinative and one σ-bond (type c-polymer).
Numerous examples are described for the type b-polymers e.g. [PcML]_n, M = Fe, Co, Ru; L = pyz, dib (fig. 6), which show conductivities up to 0.2 S.cm^-1 after doping with iodine.
Type c-polymers are synthesized using the cyano group as the bridging ligand: The preparation and characterization of (μ-cyano)-phthalocyaninatometal(III), [PcMCN]_n is reported (fig. 7). With M = Co³⁺ and Fe³⁺ conductivities up to 10^-2 were found without doping.