Hiroshi KITAGAWA, Noriaki ONODERA, Jeung-SUN ANN, Tadaoki MITANI (JAIST), Koshiro TORIUMI (Himeji Inst. Tech.) and Masahiro YAMASHITA (Nagoya Univ. and IMS)
[Synth. Met. 86, 1977 (1997)]
Transport, optical, magnetic, and structural properties of MMX-type halogen-bridged mixed-valence complex, Pt2(dta)4I(dta=CH3CS2) were investigated. This complex exhibits metallic conduction between 300 K, which is the first observation in halogen-bridged 1-D transition-metal complexes. Below 300 K, a metal-semiconductor transition was observed. This salt undergoes an order-disorder phase transition at 340 K. The mixed-valence state is discussed.