Motion of the guest molecules in the Hofmann-type clathrates

Abstract

Proton resonance spectra for Hofmann-type clathrates were measured at temperatures ranging from 80 to 296°K. The spectra of enclathrated benzene molecules showed a motional narrowing. A gradual change in the line width with temperature was observed for both aniline and pyrrole clathrates. Thiophene clathrate, however, exhibited no change in the line width. From these results, the motion of the guest molecules in clathrates was estimated. The strength of the “host-guest interaction” of benzene clathrate was compared with those of other benzene complexes.