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Field-cycling NMR relaxometry is evolving into a methodology of widespread interest with recent technological developments resulting in powerful and versatile commercial instruments. Polymers, liquid crystals, biomaterials, porous media, tissue, cement and many other materials of practical importance can be studied using this technique. This book summarises the expertise of leading scientists in the area and the editor is well placed, after four decades of working in this field, to ensure a broad ranging and high quality title. Starting with an overview of the basic principles of the technique and the scope of its use, the content then develops to look at theory, instrumentation, practical limitations and applications in different systems. Newcomers to the field will find this book invaluable for successful use of the technique. Researchers already in academic and industrial settings, interested in molecular dynamics and magnetic resonance, will discover an important addition to the literature.
Protic Ionic Liquids (PILs) build hydrogen bonds between cations and anions leading to the formation of neutral ion pairs. This is well reflected in their motional behaviour. The dynamics of cations and anions can be simultaneously investigated by means of NMR relaxometry, provided that both species contain different NMR active nuclei. Therefore, appropriate PILs were investigated by Fast Field Cycling NMR relaxometry and by high-field NMR. The validity of a relaxation model considering solely isotropic rotations was examined and cases of anisotropic or internal rotations were scrutinized.eng