Electrical conductivities of the complexes of naphthaceno(5,6-cd:11,12-c'd')bis(1,2)dithiole and its analogs obtained by electrochemical crystallization and diffusion method.

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Electrochemical crystallizations of the complexes of naphthaceno[5,6-cd: 11,12-c′d′]bis[1,2]dithiole (TTT), anthra[1,9-cd:4,10-c′d′]bis[1,2]dithiole (TTA), anthra[1,9-cd:4,10-c′d′]bis[1,2]diselenole (TSA), and naphtho[1,8-cd:4,5-c′d′]bis[1,2]dithiole (TTN) were made in 1,1,2-trichloroethane or tetrahydrofuran as a solvent. Most of the crystals were obtained with non-stoichiometric compositions, and they included the solvent. Some charge-transfer complexes including the above donors were also made by a diffusion method. The electrical conductivities of the crystals were measured by a two-probe or four-probe method. TTT(PF6)0.61 was found to be the most conductive materials in the complexes studied. Its electrical conductivity was 762 (Ω cm)−1 at room temperature, and it showed metallic behavior above 220 K. The conductivities of the other complexes varied widely in the range 102–10−7 (Ω cm)−1.
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