Abstract
Resonance Raman scattering, infrared luminescence and absorption spectra of [Pt(en) 2][Pt(en) 2Cl 2](ClO 4) 4 single crystals have been measured for polarized light at 2 K and room temperature. Contrary to the previous works on polycrystals, the incident photon energy dependence of the Raman cross section due to the symmetric ClPt IVCl stretching mode has a resonance peak at the charge-transfer absorption edge, which is well explained with the two-band model in a one-dimensional system. Two characteristic structures observed below the absorption edge are concluded not to be related to the charge-transfer transition by measurements of the excitation spectra both of the Raman scattering and of the luminescence. The origin of this luminescence is also discussed.
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