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Resonant Raman scattering in organic conductors α and β-(BEDT-TTF)2X (X=I3 and IBr2)

1986; Elsevier BV; Volume: 58; Issue: 11 Linguagem: Inglês

10.1016/0038-1098(86)90763-5

1879-2766

S. Sugai, G. Saito,

Organometallic Complex Synthesis and Catalysis

Molecular vibrations in the crystals of organic conductors α and β-(BEDT-TTF)2X, (X=I3, IBr2), a neutral donor BEDT-TTF, and acceptors n-Bu4N·I3 and n-Bu4N·IBr2 are investigated by Raman scattering. Strong Resonant effects are observed in the I3 compounds, when the incident laser wavelength approaches the optical transition energy of the I3 anion. More than ten overtones of the symmetric stretching mode of anions appear. For the modes related to the C=C vibrations the decrease of peak energies and their broadening are observed in the charge-transfer salts.