Electronic properties of novel donor-acceptor type charge transfer complexes, (BETS)2(X2TCNQ) (X = Cl, Br): 1H, 77Se and 13C-NMR

K. Hiraki, T. Takahashi, R. Kondo, S. Kagoshima, T. Hasegawa, T. Mochida, Y. Iwasa

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

1H, 13C and 77Se NMR measurements were performed to investigate the electronic properties of (BETS)2 (X2TCNQ) (X=Cl, Br). The susceptibility was decomposed into the contributions of BETS and X2TCNQ site. The line broadening of the 1H/77Se NMR spectra were observed in the Br2TCNQ complex at the metal insulator transition temperature, 12 K. Non magnetic spin singlet formation on the Br2TCNQ site was observed at 80 K by 13C NMR. Line broadening of the 1H NMR spectra were also observed in the Cl2TCNQ complex at the metal insulator transition temperature. The insulating state of the Br and Cl2TCNQ complexes under pressure are both magnetic. The holes on the BETS layers are relevant to the magnetic ordering.

Original languageEnglish
Pages (from-to)917-918
Number of pages2
JournalSynthetic Metals
Volume120
Issue number1-3
DOIs
Publication statusPublished - Mar 15 2001

Keywords

  • Based on radical cation and/or anion salts
  • Metal-insulator phase transitions
  • Nuclear magnetic resonance spectroscopy
  • Organic conductors

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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