Photoinduced Absorption Spectra of Halogen-bridged Binuclear Metal Complexes : Possible Contrast between R_4[Pt_2(P_2O_5H_2)_4X]・nH_2O and Pt_2(CH_3CS_2)_4I(Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties)

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The optical conductivity of photogenerated solitons in quasi-one-dimensional halogen-bridged binuclear metal (MMX) complexes is investigated with particular emphasis on a comparison between the two family compounds R_4[Pt_2(pop)_4X]・nH_2O (X=Cl, Br, I ; R=NH_4, Na, K, ...; pop=diphosphonate=P_2O_5H_2^<2->) and Pt_2(dta)_4I (dta=dithioacetate=CH_3CS_2^-). Soliton-induced absorption spectra for the pop complexes should split into two bands, while those for the dta complex should consist of a single band.
2005-01-15