Publication

The appearance of forbidden cross peaks in two-dimensional nuclear magnetic resonance spectra due to multiexponential T2 relaxation

Geoffrey Bodenhausen
1985
Journal Articles

Abstract

The coherence-transfer selection rules for 2-dimensional NMR are partially invalid in a study of the basic pancreatic trypsin inhibitor. These violations make it possible to study previously difficult T2 (spin-spin) relaxation effects. [on SciFinder (R)]

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Geoffrey Bodenhausen
1985
Journal Articles

Abstract

Official source

Related concepts (11)

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.

Nuclear magnetic resonance

Nuclear magnetic resonance (NMR) is a physical phenomenon in which nuclei in a strong constant magnetic field are perturbed by a weak oscillating magnetic field (in the near field) and respond by producing an electromagnetic signal with a frequency characteristic of the magnetic field at the nucleus. This process occurs near resonance, when the oscillation frequency matches the intrinsic frequency of the nuclei, which depends on the strength of the static magnetic field, the chemical environment, and the magnetic properties of the isotope involved; in practical applications with static magnetic fields up to ca.

Nuclear magnetic resonance spectroscopy

Nuclear magnetic resonance spectroscopy, most commonly known as NMR spectroscopy or magnetic resonance spectroscopy (MRS), is a spectroscopic technique to observe local magnetic fields around atomic nuclei. This spectroscopy is based on the measurement of absorption of electromagnetic radiations in the radio frequency region from roughly 4 to 900 MHz. Absorption of radio waves in the presence of magnetic field is accompanied by a special type of nuclear transition, and for this reason, such type of spectroscopy is known as Nuclear Magnetic Resonance Spectroscopy.

Related publications (1)

The appearance of forbidden cross peaks in two-dimensional nuclear magnetic resonance spectra due to multiexponential T2 relaxation

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Measurement of cross relaxation between two selected nuclei by synchronous nutation of magnetization in nuclear magnetic resonance