Abstract
AbstractHemiporphyrazine type macroheterocycles with 2,2′‐bi‐1,3‐dithiolylidene (tetrathiafulvalene) units in the polymeric chains (3a–e) were obtained by reaction of 2,2′‐bi‐1,3‐dithiolylidenetetracarbonitrile (tetracyanotetrathiafulvalene) (1) with several diamines (2a–e). The black polymers were characterized by elemental analyses and IR spectra. Thermoanalytic measurements showed that decomposition starts without melting at temperatures > 300°C. The polymers were found to be polymeric organic semiconductors with activation energies of 0,6–1,4eV and electrical conductivities in the range from 10−14 to 10−10Ω−1.cm−1. In the case of the polymers 3a and 3b it was possible to obtain metal complexes (4a–b) by substituting the two hydrogen atoms inside the macroheterocyclic rings. Depending on the metal atoms the electrical conductivities were enhanced up to two orders of magnitude.
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