Vibrational Raman and infrared spectra of chromatographically separated C₆₀ and C₇₀ fullerene clusters

We report vibrational Raman and infrared spectra for chemically separated C60 and C70 fullerenes. Thin film samples were prepared by subliming the chromatographically separated species onto appropriate substrates. The C60 Raman spectrum shows eight clear lines and two weaker ones. If C60 in fact that has the proposed buckminsterfullerene structure (as is strongly indicated by recent experiments), the present Raman measurements together with the four observed IR frequencies give a complete set of Raman and infrared active fundamental frequencies for this molecule. A comparison of this set with the calculated spectrum for buckminsterfullerene shows satisfactory agreement. © 1991.