Magnetic Resonance in Studying Natural and Synthetic Materials

by

Victor V. Rodin

DOI: 10.2174/97816810862931180101
eISBN: 978-1-68108-629-3, 2018
ISBN: 978-1-68108-630-9





This book describes nuclear magnetic resonance (NMR) methods which are used to study translational dynamics of molecules in different ...[view complete introduction]
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Basic Principles of NMR and Experimental Techniques

- Pp. 1-25 (25)

Victor V. Rodin

Abstract

This chapter introduces into NMR methods as the most important techniques for studying materials. The behaviour of spin system is considered in crossing magnetic fields from “classical” point of view. Basic equations for the vector of the bulk magnetisation M in outer magnetic field (Bloch equations) are discussed in rotating coordinate system. Spin-lattice (longitudinal) relaxation and spin-spin (transverse) relaxation are considered. The chapter describes the NMR experimental techniques for studying relaxation times T1, T2 and cross-relaxation. The role of proton exchange between the water and exchangeable protons of macromolecules is considered. Pulsed field gradient (PFG) NMR techniques are described for application in one- and twodimensions. Double-quantum-filtered (DQF) NMR spectroscopy is introduced as a technique to study the materials with anisotropic motion of molecules.

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