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Bridged Macrocyclic Transition Metal Complexes, a New Type of Semiconducting Materials

  • Michael Hanack (a1), A. Hirsch (a1), A. Lange (a1), M. Rein (a1), G. Renz (a1) and P. Vermehren (a1)...
Abstract

Bridged quasi onedimensional macrocyclic transition metal complexes [MacM(L)]n using phthalocyanine (Pc), tetrabenzoporphyrine (TBP), 1,2 -and 2,3-naphthalocyanines (1,2-; 2,3-Nc) as macrocycles (Mac) with M = e.g. Fe, Ru, Co and L = e.g. pyrazine (pyz), 1,4-diisocyanobenzene (dib), tetrazine (tz) exhibit interesting electrical properties. Regardless of the size of the bridging ligand after either chemical or electrochemical doping stable semiconducting compounds [MacM(L)Xy]n (X = e.g. I, BF4-, CIO4-…) are formed. For the first time the complete characterization of a soluble oligomer [MacM(L)]n (Mac = R4PC, M = Ru, L = dib) by 1H-NMR spectroscopy is reported. Some of these shish kebab complexes e.g. [PcM(tz)]n, (M = Fe, Ru) or [MacMCN]n; (Mac = Pc, TBP; M = Co, Fe) exhibit good semiconducting properties without additional external doping. Whether or not these compounds are intrinsic semiconductors will be discussed. The synthesis of oligomeric bridged mixed valence compounds [PcM3+LPсM2+L]n (M = e.g. Fe) is another target of our work. We report here about first attempts to synthesize these oligomers.

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MRS Online Proceedings Library (OPL)
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  • EISSN: 1946-4274
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