Physical properties of quasi-one-dimensional charge-transfer metal complexes; [M(HBQD)2RBTCNQ (M=Ni, Pd; H2BQD=1,2-benzoquinonedioxime)

Yuka Kagami, Fumiyasu Iwahori, Tachi Ohishi, Tetsuo Hama, Toshio Manabe, Masahiro Yamashita, Hiroshi Kitagawa, Ken ichi Sakai, Tadaoki Mitani

研究成果: Conference article査読


We have investigated the physical properties of [M(HBQD)2RBTCNQ (M=Ni, Pd; H2BQD=1,2-benzoquinonedioxime) which consist of alternating -D-A-D-A- type stackings of transition-metal-complex donors and organic TCNQ acceptors. The degree of charge-transfer for each sample was estimated to be -0.1 from the results of IR, Raman spectra, and bond length of TCNQ. From XPS measurements, the valence state of Ni or Pd was found to be transformed at low temperature from +II to the mixed valency of +II, +III or +II, +IV, respectively. This behavior can be considered to be due to the charge-transfer from d-orbital of the transition metal to π-antibonding orbital of the HBQD ligands, which was confirmed by the lower-energy shift of IR stretching modes of C=N in HBQD. This temperature-induced charge-transfer between transition metal and ligand is the first observation in the transition-metal-complex assemblies.

ジャーナルSynthetic Metals
1 -3 pt 3
出版ステータスPublished - 1997 1月 1
イベントProceedings of the 1996 International Conference on Science and Technology of Synthetic Metals, ICSM'96. Part 3 (of 3) - Snowbird, UT, USA
継続期間: 1996 7月 281996 8月 2

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 凝縮系物理学
  • 材料力学
  • 機械工学
  • 金属および合金
  • 材料化学


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