High-resolution, >1 GHz NMR in unstable magnetic fields
High-resolution, >1 GHz NMR in unstable magnetic fields
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DOI：
10.1103/physrevlett.85.3732
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发表时间：
2000-10-23
影响因子：
8.6
通讯作者：
Warren, WS
中科院分区：
文献类型：
--
作者：
Lin, YY;Ahn, S;Warren, WS
Resistive or hybrid magnets can achieve substantially higher fields than those available in superconducting magnets, but their spatial homogeneity and temporal stability are unacceptable for high-resolution NMR. We show that modern stabilization and shimming technology, combined with detection of intermolecular zero-quantum coherences (iZQCs), can remove almost all of the effects of inhomogeneity and drifts, while retaining chemical shift differences and J couplings. In a 25-T electromagnet (I kHz/s drift, 3 kHz linewidth over 1 cm(3)), iZQC detection removes >99% of the remaining inhomogeneity, to generate the first high-resolution liquid-state NMR spectra acquired at >1 GHz.
