Abstract
The number of applications of time domain NMR using low-field spectrometers in research and development has been steadily increasing in recent years with applications ranging from quality control of industrial products to the study of physical and chemical properties of a wide array of solid and liquid samples to, most recently, electrochemical studies. In this mini-review we summarize the progress that has been achieved in the coupling between time domain NMR (using low-field spectrometers) and electrochemistry and how the challenges that this coupling poses have been overcome over the years. We also highlight the effect that the static magnetic field of the NMR spectrometer has on the electrochemical systems.
Highlights
The uses of low-field time domain NMR in research and development have been steadily increasing over the years [1,2,3,4,5,6]
The instruments used for these analyses are normally based on permanent magnets which produce a magnetic field intensity usually below 0.6 T (25 MHz for 1 H) with a low homogeneity which means that the relevant information can only be extracted from the intensity of the free induction decay signal (FID), the spin echo or by measuring the relaxation times T1 and/or
It has been observed that reactions performed in situ show a higher reaction rate than those performed ex situ due to a phenomenon known as magnetoelectrolysis [12,13] which occurs as a result of the interaction between the magnetic field and the ion flow present during the experiments
Summary
The uses of low-field time domain NMR in research and development have been steadily increasing over the years [1,2,3,4,5,6]. It has been observed that reactions performed in situ show a higher reaction rate than those performed ex situ due to a phenomenon known as magnetoelectrolysis [12,13] which occurs as a result of the interaction between the magnetic field and the ion flow present during the experiments. This effect increases the mass transport within the solution during the experiment. The use of inductively coupled coils to improve the signal-to-noise ratio of the NMR signal during in situ electrochemical experiments is shown here
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