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Charge-Density-Wave to Mott—Hubbard Phase Transition in Quasi-One-Dimensional Bromo-Bridged Pd Compounds.

A -Pd-Br-Pd- Mott-Hubbard state was observed in a quasi-one-dimensional bromo-bridged Pd compound [Pd(en)Br](C-Y)·HO (en = ethylenediamine, C-Y = dipentylsulfosuccinate) for the first time. The phase transition between Mott-Hubbard and charge-density-wave states occurred at 206 ± 2 K and was confirm...

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Publicado en:Journal of the American Chemical Society Vol. 130; no. 36; pp. 12080 - 12085
Autores principales: Takaishi, Shinya, Takamura, Mitsuhito, Kajiwara, Takashi, Miyasaka, Hitoshi, Yamashita, Masahiro, Iwata, Muneaki, Matsuzaki, Hiroyuki, Okamoto, Hiroshi, Tanaka, Hisaaki, Kuroda, Shin-ichi, Nishikawa, Hiroyuki, Oshio, Hiroki, Kato, Kenichi, Takata, Masaki
Formato: Artículo
Publicado: American Chemical Society 9/10/2008
Materias:
Phase transitions
Palladium compounds
Optical diffraction
Spectrum analysis
Raman effect
Acceso en línea:Ver este registro en EBSCOhost
Sumario:A -Pd-Br-Pd- Mott-Hubbard state was observed in a quasi-one-dimensional bromo-bridged Pd compound [Pd(en)Br](C-Y)·HO (en = ethylenediamine, C-Y = dipentylsulfosuccinate) for the first time. The phase transition between Mott-Hubbard and charge-density-wave states occurred at 206 ± 2 K and was confirmed by using X-ray, ESR, Raman and electronic spectroscopies, electrical resistivity, and heat capacity. From X-ray powder diffraction patterns and Raman spectra of a series of Pd-Br compounds, [Pd(en)Br](C-Y)·HO (n = 4,5,6,7,8,9, and 12), chemical pressure from the alkyl chains of the counterions caused the phase transition.