Abstract
Nuclear magnetic resonance spectroscopy has grown to a powerful tool for investigations of the molecular structure, the structure of solids, and also of pronominal of molecular motion in liquids and solids. Stimulated by this wide range of possible applications from the very beginning of NMR research, interest has been cast upon questions of sorption and heterogeneous catalysis. The literature available up to 1972 has been reviewed in an excellent article by Derouane, Fraissard, Fripiat, and Stone [1] and in earlier reviews by Resing [2] and Packer [3]. A detailed description of the theoretical background of NMR on adsorption systems has been given by Pieifer [4].