波谱学杂志2026，Vol.43Issue(1)：1-15,15.DOI:10.11938/cjmr20253163
低场固体核磁共振魔角旋转探头关键部件的研制
Design and Development of Key Components for a Low-field Solid-state NMR Magic Angle Spinning(MAS)Probe
摘要
Abstract
High-field solid-state nuclear magnetic resonance(NMR)technology boasts high sensitivity and multi-nucleus detection capability.However,when studying paramagnetic materials like lithium-ion batteries,the strong paramagnetism of transition metal ions(such as Mn3+,Fe3+,etc.)leads to issues like magnetic field inhomogeneity,spectral line broadening,signal attenuation,and inability to perform magic-angle spinning(MAS)at high magnetic fields.Under low-field conditions,the magnetic field distortion induced by paramagnetic effects is significantly reduced,offering a potentia l solution to these problems.This paper presents a theoretical analysis of the advantages of low-field environments for studying paramagnetic substances.A low-field solid-state MAS probe for a 0.5 T Halbach magnet was developed.Furthermore,a complete low-field solid-state MAS spectrometer was constructed.In experiments,7Li NMR signals of various paramagnetic samples were acquired at a spinning speed of 12 kHz,verifying the feasibility of the self-developed low-field solid-state MAS technology for paramagnetic samples.This approach addresses the problems of overlapping spin sidebands and MAS failure at high fields,providing a new pathway for NMR research on paramagnetic materials.关键词
固体核磁共振/低场核磁共振/魔角旋转(MAS)技术/低场MAS/射频线圈Key words
solid-state NMR/low-field NMR/magic angle spinning(MAS)technology/low-field MAS/radio frequency coil分类
数理科学引用本文复制引用
吴肇博,王佳鑫,刘万震,程鑫,魏巍,黄臻,陈方,张志,刘朝阳..低场固体核磁共振魔角旋转探头关键部件的研制[J].波谱学杂志,2026,43(1):1-15,15.基金项目
国家重点研发计划(2023YFE0113300,2022YFF0707000),中国科学院基础与交叉前沿科研先导专项(XDB0540300),国家自然科学基金项目(22327901,22374158,22127801),中国科学院精密测量科学与技术创新研究院交叉培育项目(S21S4101). （2023YFE0113300,2022YFF0707000）
