Mixed charge-ordering state of MMX-type quasi-one-dimensional iodide-bridged platinum complexes with binary countercations.
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.
Iguchi
Hiroaki
H
Department of Chemistry, Graduate School of Science, Tohoku University, 6-3 Aza-aoba, Aramaki, Sendai 980-8578, Japan.
Takaishi
Shinya
S
Kajiwara
Takashi
T
Miyasaka
Hitoshi
H
Yamashita
Masahiro
M
Matsuzaki
Hiroyuki
H
Okamoto
Hiroshi
H