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Article Dans Une Revue Comptes Rendus. Chimie Année : 2019

Designing and building a low-cost portable FT-NMR spectrometer in 2019: A modern challenge

Résumé

High-field FT-NMR is a high performance spectroscopic technique that is essential in many analytical fields. The non-destructive nature of NMR makes it a preferred means of analyzing chemical and biological environments. Compact NMR benchtop spectrometers are low-cost alternatives to conventional high field and high resolution spectrometers). A research laboratory may want to develop its own compact FT-NMR spectrometer ("Benchtop Home-Built NMR") with a reduced financial cost. But why? First of all, to use it punctually as an additional channel (nucleus X) to a high-resolution spectrometer, but also to be able to couple it with other with other Physics experiments such as an optical microscope to study spin diffusion in semiconductors, for instance. In addition, a "Home-Built" NMR can be used with a low-field permanent magnet for the quantification of species that does not necessarily require high-resolution, avoiding the need for weekly and expensive cryogenic services. Outside the research laboratory, this portable NMR can be used for the in situ analysis of outdoor natural environments. Finally, this compact spectrometer is naturally dedicated to the teaching of NMR technique and is open to the study of the basic electronic functions that constitute an NMR spectrometer. The main question then arises: How to build a robust "HomeBuilt” NMR? In this article, we describe the realization of an NMR instrument based on electronic components and boards (LNA, ADC, FPGA, ARM, DDS...) easily commercially available, and allowing to obtain a benchtop NMR instrument presenting both a high acquisition dynamics and a good signal-to-noise ratio.
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Dates et versions

hal-02308789 , version 1 (21-07-2022)

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Paternité - Pas d'utilisation commerciale

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Alain Louis-Joseph, Philippe Lesot. Designing and building a low-cost portable FT-NMR spectrometer in 2019: A modern challenge. Comptes Rendus. Chimie, 2019, 22, pp.695-711. ⟨10.1016/j.crci.2019.07.001⟩. ⟨hal-02308789⟩
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