NMR investigations of structural and dynamic properties of coals and matrix-isolated phosphorus and alkali metal clusters by relaxation and CPMAS techniques

uclear magnetic resonance (NMR) studies of disordered solids are presented. The research has focussed on the structural and dynamic properties of two classes of disordered solids: coals of different rank, and matrix-isolated phosphorus and alkali metal clusters.;Proton NMR relaxation studies of five coals from the Argonne Premium Coal Sample Program have been performed over a temperature range of 80 to 300K. The nuclear spin-lattice relaxation times in the laboratory frame, ;The study of clusters has recently become a very important field of research, stemming from numerous applications of clusters to studies of superconductivity, heterogenous catalysis, and surface chemistry. Clusters are usually studied in the gas phase or they can be stabilized in an inert matrix. In these studies the technique of cluster isolation in cryogenic matrices in a rotating cryostat has been developed and tested. Samples of phosphorus and alkali metal clusters trapped in hydrocarbon matrices were prepared for NMR investigations. Solid state...