Novel nuclear magnetic resonance techniques for the study of quadrupolar nuclei in clays and other layered materials
Abstract:The main developments taking place in Nuclear Magnetic Resonance Spectroscopy (NMR) of quadrupolar (spin I > 1/2) nuclei with half integer spins in solids, particularly clays and other layered materials, have been reviewed. The advent of Multiple-Quantum (MQ) Magic-Angle Spinning (MAS) NMR spectroscopy has been a step-change development to the studies of quadrupolar nuclei in solids. It is now possible to record high-resolution spectra of important nuclei, such as 11B, 17O, 23Na, 27Al and 69,71Ga,in synthetic and natural clays. Since its introduction in 1995 M QMAS NMR has evolved considerably and, at present, a range of very useful related techniques are available and have been reviewed,as has the current situation with regard to applications to clays and other layered materials.
Document Type: Review Article
Publication date: September 1, 2003