We report the results of NMR relaxometry measurements on the p-tert-butyl-calixarene and the p-tert-butyl-calixarene(1:1)toluene supramolecular systems in the solid state. Relevant information on the dynamics of the p-tert-butyl groups of the host cage is obtained, and the variation produced by the toluene guest molecule in the activation energy characterizing the reorientation of the methyl groups is determined. This variation provides an estimate of the host-guest interaction energy, part of which is attributed to a noncovalent, attractive force between CH3 groups of the host and the π system of the guest molecule.
|Number of pages||4|
|Journal||Physical Review B - Condensed Matter and Materials Physics|
|Publication status||Published - 1999|
ASJC Scopus subject areas
- Condensed Matter Physics