Raman spectroscopy of the charge transfer complex (TTF)xC60Br8

Muthu, V. S. D. ; Sood, K. A. ; Govindaraj, A. ; Rao, N. R. C. (1995) Raman spectroscopy of the charge transfer complex (TTF)xC60Br8 Fullerene Science and Technology, 3 (6). pp. 755-764. ISSN 1064-122X

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Official URL: http://www.tandfonline.com/doi/abs/10.1080/153638X...

Related URL: http://dx.doi.org/10.1080/153638X9508543821


We report Raman studies on powder samples of the charge transfer complex (TTF)x C60Br8 at room temperature. The phonons show considerable softening with respect to the frequencies observed in the Raman spectrum of solid C60 Brg. The strongest mode at 1464 cm-1 in C60Br8 is red shifted to a doublet with peaks at 1414 and 1421 cm-1, implying an average phonon softening Δω of -47 cm-1. A comparison with the phonon softening of the corresponding Ag(2) mode in alkali-doped C60 (Δω~ - 36 cm-1 for A6C60, A = K, Rb or Cs) suggests that 8 electrons are transferred per C60Br8 molecule in the charge transfer complex. The mode at 503 cm-1 in C60Br8 is shifted upwards, similar to that in A6C60 compounds.

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