Use of High Resolution Solid State NMR Techniques for the Study of Adsorbed Species

Recent years have seen the development of a variety of high resolution solid state nuclear magnetic resonance (NMR) techniques (1-7) that are allowing detailed characterization of the physical and chemical environment of adsorbed molecules or ions. Many of these techniques are still in the developing stages, and only preliminary results are available at this time. It will be the purpose of this paper to discuss recent results which we have obtained in the application of multiple pulse techniques to the characterization of protons, hydroxyl groups,on oxide-type surfaces (8), and to describe a recently introduced (9) multiple pulse double resonance (13C - 1H) technique for characterization of both chemical and local geometrical changes that occur upon adsorption of hydrocarbons on an oxide-type surface. Nuclear Magnetic Resonance Techniques The use of conventional pulsed NMR techniques (10), multiple pulse NMR techniques (1-3), and double resonance high resolution techniques (4-7,9) has been widely discussed.