不均匀场下空间编码超快速高分辨NMR研究进展

二维核磁共振(2D NMR)的提出和发展，为NMR技术的研究和应用提供了广阔的空间. 然而当样品或磁场本身不均匀时，高分辨的2D NMR谱难以获得. 此外，常规2D NMR实验通常需要长的采样时间. 空间编码超快速采样方法利用空间编码技术，只需单次扫描即可获得2D甚至多维NMR谱，极大地缩短了采样时间. 目前相位补偿、相干转移和分子间多量子相干等技术与空间编码技术相结合，已成功实现不均匀场下超快速获得高分辨NMR谱. 该文对不均匀场下空间编码超快速NMR方法进行了介绍，对其未来发展进行了展望.

Progress of Ultrafast Spatially Encoded High-Resolution Nuclear Magnetic Resonance Spectroscopy in Inhomogeneous Fields

The proposal and development of two-dimensional nuclear magnetic resonance (2D NMR) provide a broad space for the research and application of NMR. In many cases, however, high-resolution 2D spectra are virtually impossible to obtain because of the inherent heterogeneity of the samples under investigation, as well as the poor homogeneity of the magnetic fields. It is also time-consuming to obtain a conventional 2D NMR spectrum. The ultrafast spatial encoding technique enables acquisition of a 2D or multi-dimensional NMR spectrum within a single-scan, with greatly shortened acquisition time. Schemes based on phase compensation, coherence transfer and intermolecular multiple-quantum coherence in combination with spatial encoding technique have been proposed to ultrafast obtain high-resolution NMR spectra in inhomogeneous fields. In this review, ultrafast high-resolution NMR techniques were introduced and the perspective of these techniques was discussed.