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Relaxation in Nuclear Magnetic Resonance, General

Nuclear Magnetic Resonance and Electron Spin Resonance Spectroscopy

  1. Daniel Canet,
  2. Pierre Mutzenhardt

Published Online: 15 SEP 2006

DOI: 10.1002/9780470027318.a6113

Encyclopedia of Analytical Chemistry

Encyclopedia of Analytical Chemistry

How to Cite

Canet, D. and Mutzenhardt, P. 2006. Relaxation in Nuclear Magnetic Resonance, General. Encyclopedia of Analytical Chemistry. .

Author Information

  1. Université Henri Poincaré, Nancy, France

Publication History

  1. Published Online: 15 SEP 2006

Abstract

Relaxation phenomena in nuclear magnetic resonance (NMR) govern the recovery of nuclear magnetization after it has been taken from its equilibrium state (i.e. along the static magnetic field direction). Various interactions, leading to local fluctuating magnetic fields, are responsible for the timescale of these phenomena. By themselves, these interactions yield valuable dynamic and structural information. Conversely, the influence of relaxation on the quantitative aspect of NMR spectra has to be assessed prior to any experiment aiming at using NMR as an analytical tool. This implies an evaluation not only of the relaxation parameters but also of indirect relaxation processes such as the nuclear Overhauser effect (NOE).