Raman Spectra of the Calixnarene-C₆₀ Complex

We have obtained the Raman spectra of the calixnarene C₆₀ complex of anti-conformation. Very different interactions between C₆₀ and calixnarene (n = 4,8) have been found from the vibratory spectroscopy, which are more complicated than that reported in previous works. It is of interest to find three low frequency modes, i.e., the spheroidal, torsional and E2 clearly shown at 39, 130 and 208 cm^-1, respectively. It is primarily interpreted as relaxation effect of calix8arene framework for C₆₀ where the intramolecular bridge between C₆₀ and calix8arene are partly packed and two axes of C₆₀ (100 and 101) are changed from the original configuration. The change of vibratory environment of carbon atom of C₆₀ made some new modes create. The H_g5 mode (at 1101cm^-1) and H_g2 (at 431cm^-1) have been split and some modes (the A_g2 and other six H_g modes) were hidden.