Molecular Dynamics

Molecular dynamics refers to the characteristics of molecular motion - its rate, amplitude, and directionality. Motions of molecules, or parts of molecules cause fluctuations in inter- and intramolecular interactions that can be reflected in NMR spectra. The resonances in the spectrum of a viscous (thick) solution are usually noticeably broader than those same peaks in a significiantly more dilute solution because of the relatively restricted motion in the viscous sample. Many different NMR experiments have been devised which characterize molecular dynamics.