High pressure NMR cell

Determination of reaction mechanisms by combining the observed intermediates in a catalytic cycle. To do this, it is often necessary to measure under different conditions - that is, variable temperature NMR. The use of high-pressure NMR cells is crucial in order to measure under the real catalytic conditions. The EXSY experiment helps to unravel exchange pathways, both intra-and intermolecular. 

In addition to these acidity/exchange effects, side reactions with supercritical CO2 have also been studied [72]. The authors reported experiments in a high-pressure NMR cell withstanding pressures up to 1000 bar. For methanol/ IL mixtures, NMRs showed signals of bicarbonafe and mefhyl carbonate ... 

Fill the high-pressure NMR cell with the solution close it with the Macor piston fill the Macor cap with solution and put it on the cell (these operations can be made in a glove box to prevent exposure to moisture and/or oxygen). 

Laurenczy, G. Helm, L. High Pressure NMR Cells. In Mechanisms in Homogeneous Catalysis-, Heaton, B. T. Ed. Wiley-VCH Weinheim,... 

In a second series of experiments by Dardin et al. (27), using a foldedcapillary high-pressure NMR cell, the authors investigated the H and chemical shifts of hexane, perfluorohexane, and 1,1-dihydroperfluorooctylpropionate in supercritical CO2 as a function of pressure and temperature. The nuclear... 

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