RELAXATION OF AN AX(2) NUCLEAR-SPIN SYSTEM - AMPLITUDE-MODULATED PULSES FOR EXCITATION OF LONGITUDINAL MULTISPIN ORDERED STATES

Citation
G. Zieger et al., RELAXATION OF AN AX(2) NUCLEAR-SPIN SYSTEM - AMPLITUDE-MODULATED PULSES FOR EXCITATION OF LONGITUDINAL MULTISPIN ORDERED STATES, The Journal of chemical physics, 101(9), 1994, pp. 7248-7254
Citations number
44
Categorie Soggetti
Physics, Atomic, Molecular & Chemical
ISSN journal
00219606
Volume
101
Issue
9
Year of publication
1994
Pages
7248 - 7254
Database
ISI
SICI code
0021-9606(1994)101:9<7248:ROAANS>2.0.ZU;2-G
Abstract
The P-31 and H-1 nuclear magnetic resonance (NMR) longitudinal relaxat ion behavior of the hypophosphite ion (H2PO2)(theta) is investigated i n D2O solution at various temperatures and two magnetic field strength s. Among a number of different well known methods of preparing the mag netization, a new simple procedure is described. This technique allows the excitation of exclusive longitudinal two- or three-spin order by taking advantage of amplitude modulated pulses. By using the semiclass ical Redfield approach and transformation into a normal mode basis, th e experimental data are interpreted in terms of an axially symmetric p hosphorus chemical shift anisotropy (CSA) tenser and anisotropic rotat ional diffusion.