A Practical Guide to Setting Up Diffusion Measurements
By Paul Ellis
As an elder statesman in the area of solid state NMR spectroscopy, it has become obvious that pulsed field gradients (PFG) experiments are and will continue to be important in the future. Our liquid state colleagues have enjoyed the benefits of PFG for many years. For example, PFG can remove artifacts within the transverse plane and hence reduce the number scans needed to complete a phase cycle. Likewise, PFG can be utilized to select coherences in experiments, again reducing the number acquisitions needed in a given experiment. Further, I must admit I knew very little of these experiments a few years ago.
The brief write up discussing how to set up and calibrate a PFG probe is an attempt to teach me some of the fundamental aspects of the experiments. Little or no background is needed to understand the ideas expressed in our tutorial. Simple rotating frame ideas, the basic ideas underpinning the spin echo experiment is all that is required. In reading the tutorial I hope you gain a better understanding of these experiments and take advantage of the presence of gradient coils in your own solid state NMR probes.
A Practical Guide to Setting Up Diffusion Measurements Utilizing Pulsed Field Gradients
https://dotynmr.com/download/pubs/Self-Diffusion-Guide_Doty.pdf
(Note: This links you to an expanded version of the paper – which now includes material on solids diffusion.)
