4.4 Article

Synthesis of TSF Donors Substituted with the mesoDimethylethylenedithio Group: Structures and Conducting Properties of (meso-DM-BETS)2X (X- = PF6- and AsF6-)

Journal

BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN
Volume 96, Issue 1, Pages 35-41

Publisher

CHEMICAL SOC JAPAN
DOI: 10.1246/bcsj.20220281

Keywords

Molecular conductors; Crystal structure; Electrical conductivity

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Synthesis and X-ray structure analysis of TSF-based donors substituted with the meso-dimethylethylenedithio group were successfully performed. The donor molecules in (meso-DM-BETS)(2)X formed a dimerized face-to-face p-stack, with a packing pattern classified as ss-type. Tight-binding band calculation suggested that the meso-DM-BETS salts have a two-dimensional Fermi surface and wide bandwidth. Both salts exhibited metallic conductivities down to low temperatures with sigma(r.t.) = 45-46 S cm(-1).
Synthesis and X-ray structure analysis of TSF-based donors substituted with the meso-dimethylethylenedithio group (mesoDM-EDT-TSF and meso-DM-BETS) were successfully performed. The donor molecules in (meso-DM-BETS)(2)X (X- = PF6(-) and AsF6(-)) formed a dimerized face-to- face p-stack, and the packing pattern could be classified as ss-type. A tightbinding band calculation suggested that the meso-DM-BETS salts have a two-dimensional Fermi surface with a wide bandwidth. Both salts exhibited metallic conductivities down to low temperatures with sigma(r.t.) = 45-46 S cm(-1).

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