title: Mixed charge-ordering state of MMX-type quasi-one-dimensional iodide-bridged platinum complexes with binary countercations.
abstract: A new charge-ordering (CO) state in quasi-1D iodide-bridged dinuclear Pt complexes (MMX-chains) was developed by introducing two different kinds of countercations. From crystal structure analysis, K(2)(H(3)NCH(2)CHMeCH(2)NH(3))[Pt(2)(pop)(4)I].4H(2)O (pop = P(2)H(2)O(5)(2-)) had structural features of both ACP (alternating charge-polarization) and CDW (charge-density-wave) states. Therefore, this new CO state was named ACP+CDW state. Remarkably, the structure was three dimensionally ordered, which was verified by the strong superlattice reflections observed in an X-ray oscillation photograph. Using polarized Raman and (31)P MAS NMR spectroscopies, it was shown that there were two different Pt(2) units and four inequivalent P atoms, respectively. These results agreed with the crystal structure analysis and supported the presence of the ACP+CDW state.
authors.affiliation: Department of Chemistry, Graduate School of Science, Tohoku University, 6-3 Aza-aoba, Aramaki, Sendai 980-8578, Japan.
authors.forename: Hiroaki
authors.initials: H
authors.lastname: Iguchi
authors.forename: Shinya
authors.initials: S
authors.lastname: Takaishi
authors.forename: Takashi
authors.initials: T
authors.lastname: Kajiwara
authors.forename: Hitoshi
authors.initials: H
authors.lastname: Miyasaka
authors.forename: Masahiro
authors.initials: M
authors.lastname: Yamashita
authors.forename: Hiroyuki
authors.initials: H
authors.lastname: Matsuzaki
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Okamoto