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Broadband dipolar recoupling in rotating solids: a numerical comparison of some pulse schemes
被引:41
作者:
Baldus, M
[1
]
Geurts, DG
[1
]
Meier, BH
[1
]
机构:
[1] Univ Nijmegen, Chem Phys Lab, NSR, Ctr Mol Struct Design & Synth, NL-6525 ED Nijmegen, Netherlands
关键词:
recoupling;
magic angle spinning;
pulse sequences;
numerical simulations;
polarization transfer;
correlation spectroscopy;
D O I:
10.1016/S0926-2040(98)00036-8
中图分类号:
O64 [物理化学(理论化学)、化学物理学];
学科分类号:
070304 ;
081704 ;
摘要:
A numerical comparison of the dipolar recoupling performance of several previously published homonuclear recoupling schemes under magic angle-spinning conditions is presented. Emphasis is put on the recoupled polarization transfer in a two-spin system where the efficiency is studied as a function of resonance offsets in the presence and absence of chemical-shielding anisotropies. In addition, the effect of the rf field strength is investigated. Powder pattern line shapes are shown in the on-resonance case that reveal the distribution of dipolar couplings for each recoupling scheme. These results are compared to data computed with a purposely misset rf field strength to estimate the pulse scheme sensitivity to rf-inhomogeneity and experimental missettings. (C) 1998 Elsevier Science B.V. All rights reserved.
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页码:157 / 168
页数:12
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