Theory of line shapes for zero field NMR in the presence of molecular motion

摘要

Dynamic molecular processes modulate dipolar and quadrupolar interactions in nuclear spin systems. Zero field NMR measures evolution arising purely from these interactions, and thus can be used to characterize molecular dynamics in disordered samples. A theory is presented which numerically simulates the effect of molecular reorientation in zero field NMR for a spinhyphen;1 nucleus or pairs of dipolar coupled spinhyphen;1/2 nuclei. Representative zero field NMR simulations are compared to their high field NMR analogs to demonstrate features which make zero field NMR a potentially useful tool for the study of molecular dynamics.