Publication

Determination of relaxation pathways in coupled spin systems by two-dimensional NMR exchange spectroscopy with small flip angles

Geoffrey Bodenhausen
1987
Journal Articles

Abstract

The peak intensities within the multiplets in a 2-dimensional NOESY expt. with small flip angles reflect the transition probabilities due to dipolar and other relaxation mechanisms. In the initial rate approxn., the relaxation rates (elements of the W matrix) can be extd. directly from individual peak amplitudes. Beyond the linear regime, a comparison of exptl. and simulated spectra allows one to distinguish between different hypotheses regarding assignment, structure and mol. motion. [on SciFinder (R)]

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https://infoscience.epfl.ch/entities/publication/36ab8d11-3895-4171-be75-1e7fe7a002c1

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Geoffrey Bodenhausen
1987
Journal Articles

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/36ab8d11-3895-4171-be75-1e7fe7a002c1

About this result

Related concepts (23)

Spin–spin relaxation

In physics, the spin–spin relaxation is the mechanism by which Mxy, the transverse component of the magnetization vector, exponentially decays towards its equilibrium value in nuclear magnetic resonance (NMR) and magnetic resonance imaging (MRI). It is characterized by the spin–spin relaxation time, known as T2, a time constant characterizing the signal decay. It is named in contrast to T1, the spin–lattice relaxation time.

Spin–lattice relaxation

During nuclear magnetic resonance observations, spin–lattice relaxation is the mechanism by which the longitudinal component of the total nuclear magnetic moment vector (parallel to the constant magnetic field) exponentially relaxes from a higher energy, non-equilibrium state to thermodynamic equilibrium with its surroundings (the "lattice"). It is characterized by the spin–lattice relaxation time, a time constant known as T1.

Two-dimensional nuclear magnetic resonance spectroscopy

Two-dimensional nuclear magnetic resonance spectroscopy (2D NMR) is a set of nuclear magnetic resonance spectroscopy (NMR) methods which give data plotted in a space defined by two frequency axes rather than one. Types of 2D NMR include correlation spectroscopy (COSY), J-spectroscopy, exchange spectroscopy (EXSY), and nuclear Overhauser effect spectroscopy (NOESY). Two-dimensional NMR spectra provide more information about a molecule than one-dimensional NMR spectra and are especially useful in determining the structure of a molecule, particularly for molecules that are too complicated to work with using one-dimensional NMR.

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Determination of relaxation pathways in coupled spin systems by two-dimensional NMR exchange spectroscopy with small flip angles

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