Abstract
Dipolar interactions can be composed of intramolecular and intermolecular contributions. The fluctuations of the latter are subject to translational diffusion. It is discussed how the two contributions to spin–lattice relaxation can be determined experimentally. From the intermolecular contribution the mean square displacement of molecules as a function of time can be derived on a broad, otherwise inaccessible scale. As an application example, segment diffusion in entangled polymer melts is considered.
Publisher
Royal Society of Chemistry