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 language | English |
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Pages (from-to) | 4438-4448 |
Number of pages | 11 |
Journal | Chemical Communications |
Volume | 46 |
Issue number | 25 |
DOIs | |
Publication status | Published - 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