A Comparison of the Techniques for the Study of Molecular Motion in Crystals

Abstract

AbstractAn informal review is presented of the nature of molecular motion in molecular crystals. Particular attention is paid to the various methods of experimental measurement, especially with regard to the actual information about molecular motion which can be obtained and to the ‘selectivity’ of the different techniques. The latter include: self‐diffusion by tracer and nuclear spin relaxation in a field gradient; dielectric and infra‐red absorption; slow‐neutron scattering; Rayleigh and Raman scattering; nuclear magnetic spin relaxation; and computer simulation techniques.