Synthesis and properties of conductive radical cation salts of MDT-TSF (methylenedithiotetraselenafulvalene)

K. Takimiya, Y. Kataoka, M. Kodani, Y. Aso, T. Otsubo

Research output: Contribution to journalConference articlepeer-review

4 Citations (Scopus)


Electrocrystallizaion of MDT-TSF (methylenedithiotetraselenafulvalene) in the presence of (n-Bu4N)AuI2, (n-Bu4N)PF6, or a mixture of Cu(SCN), KSCN, and 18-crown-6-ether as a supporting electrolyte gave (MDT-TSF)-X salts (X = AuI2, PF6, or Cu(NCS)2). X-ray structural analyses revealed that the salts adopt various types of crystal structures depending on the counter anion involved; the AuI2 salt takes a characteristic uniform stacking structure, the PF6 salt θ-type, and the Cu(NCS)2 salt κ-type structure. Regardless of the structure type, all the salts are highly conductive at room temperature (≥102S cm-1) and retain metallic down to low temperature. Of them, the AuI2 salt having a high conductivity of 2000 S cm-1 at room temperature showed a superconducting transition at 4.5K.

Original languageEnglish
Pages (from-to)185-187
Number of pages3
JournalSynthetic Metals
Publication statusPublished - 2003 Mar 13
EventISCOM 2001 - Rusutsu, Hokkaido, Japan
Duration: 2001 Sept 102001 Sept 14


  • Electrocrystallization
  • Radical cation salt
  • Superconductor
  • Tetraselenafulvalene


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