Magic Angle Spinning and Truncated Field Concept in NMR

IF 0.4 4区 化学 Q4 CHEMISTRY, PHYSICAL Concepts in Magnetic Resonance Part A Pub Date : 2019-12-04 DOI:10.1155/2019/5895206
J. Jenczyk
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引用次数: 1

Abstract

In order to thoroughly comprehend and adequtely interpret NMR data, it is necessary to perceive the complex structure of spin Hamiltonian. Although NMR principles have been extensively discussed in a number of distinguished introductory publications, it still remains difficult to find illustrative graphical models revealing the tensorial nature of spin interaction. Exposure of the structure standing behind mathematical formulas can clarify intangible concepts and provide a coherent image of basic phenomena. This approach is essential when it comes to hard to manage, time-dependent processes such as Magic Angle Spinning (MAS), where the anisotropic character of the spin system interactions couple with experimentally introduced time evolution processes. The presented work concerns fundamental aspects of solid state NMR namely: the uniqueness of the tetrahedral angle and evolution of both dipolar D and chemical shield σ coupling tensors under MAS conditions.
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核磁共振中的魔角旋转和截断场概念
为了全面地理解和充分地解释核磁共振数据,有必要了解自旋哈密顿量的复杂结构。尽管核磁共振原理已经在许多著名的介绍性出版物中进行了广泛的讨论,但仍然很难找到说明自旋相互作用的张量性质的图形模型。揭示数学公式背后的结构可以澄清无形的概念,并提供基本现象的连贯图像。当涉及到难以管理的时间依赖过程时,这种方法是必不可少的,例如魔角旋转(MAS),其中自旋系统相互作用的各向异性特征与实验引入的时间演化过程相耦合。提出的工作涉及固态核磁共振的基本方面,即:四面体角的唯一性和双极D和化学屏蔽σ耦合张量在MAS条件下的演变。
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来源期刊
CiteScore
0.90
自引率
0.00%
发文量
12
审稿时长
>12 weeks
期刊介绍: Concepts in Magnetic Resonance Part A brings together clinicians, chemists, and physicists involved in the application of magnetic resonance techniques. The journal welcomes contributions predominantly from the fields of magnetic resonance imaging (MRI), nuclear magnetic resonance (NMR), and electron paramagnetic resonance (EPR), but also encourages submissions relating to less common magnetic resonance imaging and analytical methods. Contributors come from academic, governmental, and clinical communities, to disseminate the latest important experimental results from medical, non-medical, and analytical magnetic resonance methods, as well as related computational and theoretical advances. Subject areas include (but are by no means limited to): -Fundamental advances in the understanding of magnetic resonance -Experimental results from magnetic resonance imaging (including MRI and its specialized applications) -Experimental results from magnetic resonance spectroscopy (including NMR, EPR, and their specialized applications) -Computational and theoretical support and prediction for experimental results -Focused reviews providing commentary and discussion on recent results and developments in topical areas of investigation -Reviews of magnetic resonance approaches with a tutorial or educational approach
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