The hyper-Raman spectrum of buckminsterfullerene C60 was observed at room temperature. The spectrum clearly showed infrared-active modes with t(1u) symmetry and the silent modes with t(2u), g(u), and h(u) as a result of electronic resonances via the Herzberg-Teller mechanism. Moreover, Raman-active modes with a(g) and h(g) were also detected, although these were hyper-Raman-forbidden in the electric dipole approximation, suggesting a contribution of higher-order nonlinear processes such as magnetic dipole transitions. These results suggest that hyper-Raman spectroscopy and microscopy are indeed widely applicable in the field of molecular science.
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Ikeda et al. (2008) studied this question.
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