Molecular-Metals Based on Nonplanar Donor BEDT-ATD - Appearance of Metal-Insulator-Transition by Anion or Solvent Replacement

Imaeda K; Krober J; Nakano C; Tomura M; Tanaka S; Yamashita Y; Kobayashi H; Inokuchi H; Kobayashi A

Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals, Vol.296, 205-216, 1997

DOI10.1080/10587259708032322 Export Citation

Molecular-Metals Based on Nonplanar Donor BEDT-ATD - Appearance of Metal-Insulator-Transition by Anion or Solvent Replacement

Imaeda K, Krober J, Nakano C, Tomura M, Tanaka S, Yamashita Y, Kobayashi H, Inokuchi H, Kobayashi A

We have prepared the cation radical salts based on a nonplanar donor 4,11-bis(4’,5’-ethylenedithio-1’,3’-dithiole-2’-ylidene)-4,11-dihydroanthra[2,3-c][1,2,5] thiadiazole (BEDT-ATD), (BEDT-ATD)(2)X(Solvent) (X=PF6, BF4; Solvent=THF, DHF (2,5-dihydrofuran)). The band structure of a stable organic metal (BEDT-ATD)(2)PF6(THF) is presented. The replacement of an anion or a solvent molecule has induced a metal-insulator transition at 200 K and 150 K for(BEDT-ATD)(2)BF4(THF) and (BEDT-ATD)(2)PF6(DHF), respectively.

Keywords:ORGANIC CONDUCTORS;THERMOPOWER