Abstract
Publisher Summary This chapter is discusses the theory, experiment, and application of the nuclear magnetic resonance (NMR) of paramagnetic lanthanide complexes and shift reagents. The effect of paramagnetic ions or their complexes on the NMR spectra of ligand molecules has been known since the early days of NMR spectroscopy. Lanthanides can be used as shift reagents both in aqueous solutions and in organic solvents. The tripositive lanthanide ions form complexes in aqueous solution with negatively charged ligands and with neutral molecules containing a favorable arrangement of several polar groups. In addition, the chapter explains nuclear relaxation in lanthanide complexes. Nuclear relaxation in paramagnetic complexes is brought by the time dependent terms of the nuclear spin Hamiltonian. The magnitude of the relaxation effect is governed by the intensity of the electron-nuclear interaction and by the rate at which the interaction is interrupted.
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