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Issue 29, 2011
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High-resolution NMR spectroscopy under the fume hood

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This work reports the possibility to acquire high-resolution 1H NMR spectra with a fist-sized NMR magnet directly installed under the fume hood. The small NMR sensor based on permanent magnets was used to monitor the trimerization of propionaldehyde catalyzed by indium trichloride in real time by continuously circulating the reaction mixture through the magnet bore in a closed loop with the help of a peristaltic pump. Thanks to the chemical selectivity of NMR spectroscopy the progress of the reaction can be monitored on-line by determining the concentrations of both reactant and product from the area under their respective lines in the NMR spectra as a function of time. This in situ measurement demonstrates that NMR probes can be used in chemistry laboratories, e.g. for reaction optimization, or installed at specific points of interest along industrial process lines. Therefore, it will open the door for the implementation of feedback control based on spectroscopic NMR data.

Graphical abstract: High-resolution NMR spectroscopy under the fume hood

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Article information

14 Apr 2011
17 May 2011
First published
23 Jun 2011

Phys. Chem. Chem. Phys., 2011,13, 13172-13176
Article type

High-resolution NMR spectroscopy under the fume hood

S. K. Küster, E. Danieli, B. Blümich and F. Casanova, Phys. Chem. Chem. Phys., 2011, 13, 13172
DOI: 10.1039/C1CP21180C

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