Stabilization of Pd(iii) states in nano-wire coordination complexes

Masahiro Yamashita, Shinya Takaishi

Research output: Contribution to journalReview article

21 Citations (Scopus)

Abstract

In spite of a long history of quasi-one-dimensional halogen-bridged complexes (MX-chains), all Pt and Pd complexes form the charge-density wave (CDW) state (-X⋯MII⋯X-MIV-X⋯), while all Ni complexes form Mott-Hubbard (MH) states (-X-NiIII-X-Ni III-X-), without exception. We have succeeded in stabilizing the Pd(iii) MH state for the first time by utilizing the following two methods: partial substitution with Ni(iii) ions, [Ni1-xPdx(chxn) 2Br]Br2, and chemical pressure via long alkyl chains introduced as counter-anions, [Pd(en)2Br](Cn-Y) 2·H2O. In both systems, it has been revealed that the electronic state of bromo-bridged Pd compounds are determined by the Pd⋯Pd distances, in other words, CDW and MH states are stabilized when Pd⋯Pd distances are longer and shorter than 5.26 Å, respectively.

Original languageEnglish
Pages (from-to)4438-4448
Number of pages11
JournalChemical Communications
Volume46
Issue number25
DOIs
Publication statusPublished - 2010 Jul 7

ASJC Scopus subject areas

  • Catalysis
  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Chemistry(all)
  • Surfaces, Coatings and Films
  • Metals and Alloys
  • Materials Chemistry

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