Ultra-high resolution in low field tabletop NMR spectrometers†,RSC Advances

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Ultra-high resolution in low field tabletop NMR spectrometers†
RSC Advances ( IF 3.9 ) Pub Date : 2017-10-19 00:00:00 , DOI: 10.1039/c7ra09594e
Kavitha Rachineni _{1,

2,

3,

4} , Veera Mohana Rao Kakita _{1,

2,

3,

4} , Ramakrishna V. Hosur _{1,

2,

3,

4,

5}

Affiliation

At the present time, when NMR spectrometers are getting prohibitively expensive, for routine applications in chemistry where NMR is an indispensable technique, working with tabletop low field spectrometers would be an attractive proposition. However, as is well known, chemical shift dispersion is a serious limitation on these systems. The modern strategies of pure shift spectroscopy would not be useful because of lack of gradients, on the one hand, and even when they are there, there will be an extreme loss of sensitivity by slice selective gradients in the pulse sequences, on the other. The present manuscript presents an approach for resolution enhancement by employing processing-based advancements in the pure shift NMR schemes and presents data acquired on a 60 MHz NMR spectrometer. We use generalized indirect covariance (GIC) processing based reconstruction for enhancing the resolution in 2D-NMR spectra and that has been demonstrated on different small organic molecule samples.

中文翻译：

低磁场台式NMR光谱仪的超高分辨率†

目前，当NMR光谱仪变得非常昂贵时，对于NMR是必不可少的技术的化学常规应用而言，使用台式低场光谱仪将是一个有吸引力的主张。但是，众所周知，化学位移分散是对这些系统的严重限制。一方面，由于缺乏梯度，纯位移光谱的现代策略将无济于事，另一方面，即使存在梯度，也将由于脉冲序列中的切片选择性梯度而极大地降低灵敏度。本手稿提出了一种通过在纯位移NMR方案中采用基于处理的改进来提高分辨率的方法，并提出了在60 MHz NMR光谱仪上获得的数据。

更新日期：2017-10-19

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