Long-lived states in solution NMR: theoretical examples in three- and four-spin systems.
Long-lived spin states have been observed in a variety of systems. Although the dynamics underlying the long lifetimes of these states are well understood in the case of two-spin systems, the corresponding dynamics in systems containing more spins appear to be more complex. Recently it has been shown that a selection rule for transitions mediated by intramolecular dipolar relaxation may play a role in determining the lifetimes of long-lived states in systems containing arbitrary numbers of spins. Here we present a theory of long-lived states in systems containing three and four spins and demonstrate how it can be used to identify states that have little or no intramolecular dipolar relaxation.
Department of Radiology, Beth Israel Deaconess Medical Center, and Harvard Medical School, Ansin Building, Room 222, 330 Brookline Avenue, Boston, MA 02215, USA. akgrant@bidmc.harvard.edu
Aaron K
AK
Grant
Elena
E
Vinogradov
D000465:Algorithms; D003198:Computer Simulation; D009682:Magnetic Resonance Spectroscopy / Q000379:methods*; D008956:Models, Chemical; D044367:Phase Transition; D013113:Spin Labels
D013113:Spin Labels