One-Dimensional Ni(III) and Pd(III) Mott Insulators

Masahiro Yamashita, Shinya Takaishi

Research output: Chapter in Book/Report/Conference proceedingChapter


Although quasi-one-dimensional halogen-bridged complexes (MX chains) have been studied extensively, most of the MX chains reported are in a charge-density-wave (CDW) state (X⋯MII⋯XMIVX⋯). The first M(III) Mott-Hubbard (MH) complex was reported in 1981, and its remarkable physical properties have been reported. More recently, our group has prepared the first Pd(III) MH complex by utilizing the following two methods: partial substitution with Ni(III) ions, [Ni1-xPdx(chxn)2Br]Br2, and chemical pressure via long alkyl chains attached to the counteranions, [Pd(en)2Br](Cn-Y)2{bullet operator}4H2O. In both systems, the electronic states of the bromide-bridged Pd MX chains were established via the Pd⋯Pd distances. The results show that the CDW and MH states are stabilized when Pd⋯Pd distances are longer and shorter than 5.26Å, respectively.

Original languageEnglish
Title of host publicationComprehensive Inorganic Chemistry II (Second Edition)
Subtitle of host publicationFrom Elements to Applications
PublisherElsevier Ltd
Number of pages15
ISBN (Print)9780080965291
Publication statusPublished - 2013 Aug 1


  • CT insulator
  • Charge-density wave
  • Chemical pressure
  • MX chain
  • Mott insulator
  • Mott-Hubbard
  • Ni(III)
  • One dimensional
  • Pd(III)
  • Peierls transition

ASJC Scopus subject areas

  • Chemistry(all)


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