UC Davis

High-pressure NMR has been in existence or 65 years and has evolved to be an essential tool for many disciplines. High-pressure NMR is useful both for determining standard thermodynamic properties and for assigning mechanisms of aqueous ligand-exchange reactions since solvation changes are sensitive to pressure. There have been many different apparatuses to provide and maintain pressure to the chemical systems of interest. Of these different devices, our group has primarily used the clamp-cell probe design, which allows for study of aqueous solute species that are important to geochemistry and at conditions seen in the crust and upper mantle of the Earth.11B and29Si studies are reviewed herein, and directions of future progress in the field are provided.