Synthesis of TSF Donors Substituted with the<i>meso</i>-Dimethylethylenedithio Group: Structures and Conducting Properties of (<i>meso</i>-DM-BETS)2X (X− = PF6− and AsF6−)

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  • Naoya Kinoshita
    Department of Applied Chemistry, Graduate School of Engineering, Ehime University, 3 Bunkyo-cho, Matsuyama, Ehime 790-8577 , Japan
  • Takashi Shirahata
    Department of Applied Chemistry, Graduate School of Engineering, Ehime University, 3 Bunkyo-cho, Matsuyama, Ehime 790-8577 , Japan
  • Toshio Naito
    Research Unit for Materials Development for Efficient Utilization and Storage of Energy (E-USE), Ehime University, 2-5 Bunkyo-cho, Matsuyama, Ehime 790-8577 , Japan
  • Yohji Misaki
    Department of Applied Chemistry, Graduate School of Engineering, Ehime University, 3 Bunkyo-cho, Matsuyama, Ehime 790-8577 , Japan

説明

<jats:title>Abstract</jats:title><jats:p>Synthesis and X-ray structure analysis of TSF-based donors substituted with the meso-dimethylethylenedithio group (meso-DM-EDT-TSF and meso-DM-BETS) were successfully performed. The donor molecules in (meso-DM-BETS)2X (X− = PF6− and AsF6−) formed a dimerized face-to-face π-stack, and the packing pattern could be classified as β-type. A tight-binding 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 σr.t. = 45–46 S cm−1.</jats:p>

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