Publication

Criteria for the accuracy of composite pulses in multiple-quantum NMR

Geoffrey Bodenhausen
1987
Journal Articles

Abstract

The correct use of composite pulses in multiple quantum NMR spectroscopy is described using the conventional sequence for 1-dimensional multiple-quantum filtration. The criteria for correct composite pulse selection which gives improvement in the NMR spectra are given. The effects of choosing the correct composite pulse were demonstrated for 2,3-dibromopropionic acid. The composite pulses of R. Tycko et al. (1985) are effective in compensating for pulse errors when applied to an arbitrary initial d. operator. [on SciFinder (R)]

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https://infoscience.epfl.ch/entities/publication/3a586cab-0b49-40ca-b9be-9d8a16abaac3

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Geoffrey Bodenhausen
1987
Journal Articles

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/3a586cab-0b49-40ca-b9be-9d8a16abaac3

About this result

Related concepts (12)

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.

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.

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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Criteria for the accuracy of composite pulses in multiple-quantum NMR

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