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.
Grant
Aaron K
AK
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
Vinogradov
Elena
E
D000465:Algorithms; D003198:Computer Simulation; D009682:Magnetic Resonance Spectroscopy / Q000379:methods*; D008956:Models, Chemical; D044367:Phase Transition; D013113:Spin Labels
D013113:Spin Labels