Progress of High-Resolution Liquid NMR Spectroscopy in Inhomogeneous and Unstable Fields

Abstract

Abstract:

Strong and extremely homogeneous and stable static magnetic fields are usually required for high-resolution NMR. However, large inhomogeneity and drift of the magnetic fields exist in the resistive and hybrid magnets which can provide much higher magnetic fields than the superconducting counterpart. On the other hand, the susceptibility gradients and physiological motions in in vivo studies produce inhomogeneous and unstable magnetic fields. Therefore, the inhomogeneous and instable magnetic fields in the non-ideal condition are unavoidable and can hardly be eliminated by conventional methods such as shimming and locking. Some approaches had been proposed to obtain high-resolution NMR spectra in the inhomogeneous and instable field, such as intermolecular zero quantum coherences (iZQCs), spatially encoding single-scan scheme and deconvolution. In the paper, these four methods were discussed.

Key words: nuclear magnetic resonance, high-resolution, inhomogeneous and unstable magnetic fields, spatially encoding, intermolecular multiplequantum coherences

CLC Number:

O482.53

ZHANG Zhi-Yong, LIN Mei-Jin, LIN Yu-Lan, CHEN Zhong. Progress of High-Resolution Liquid NMR Spectroscopy in Inhomogeneous and Unstable Fields[J]. Chinese Journal of Magnetic Resonance, 2010, 27(3): 310-325.

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