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NMR Spectrometers: Resolution and Error Correction01:14

NMR Spectrometers: Resolution and Error Correction

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When magnetic nuclei in a sample achieve resonance and undergo relaxation, the signal detected in NMR is an approximately exponential free induction decay. Fourier transform of an exponential decay yields a Lorentzian peak in the frequency domain. Lorentzian peaks in an NMR spectrum are defined by their amplitude, full width at half maximum, and position, where the peak width is governed by the spin-spin relaxation time alone. In real experiments, however, the applied magnetic field is rendered...
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Double Resonance Techniques: Overview01:12

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Double resonance techniques in Nuclear Magnetic Resonance (NMR) spectroscopy involve the simultaneous application of two different frequencies or radiofrequency pulses to manipulate and observe two distinct nuclear spins. One important application of double resonance is spin decoupling, which selectively suppresses coupling with one type of nucleus while observing the NMR signal from another nucleus, simplifying the spectrum and enhancing resolution.
Spin decoupling is usually achieved by...
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NMR Spectrometers: Overview01:20

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NMR spectrometers consist of a strong magnet, a radiofrequency transmitter, and a detector attached to a computer console for recording spectra of samples containing NMR-active nuclei. In first-generation NMR instruments called continuous-wave spectrometers, the resonance frequencies of the nuclei are determined by frequency-sweep or field-sweep methods. The magnetic field strength is fixed and the rf signal is swept in the former, while the radiofrequency signal is fixed and the magnetic field...
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¹H NMR: Interpreting Distorted and Overlapping Signals01:02

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Spin systems where the difference in chemical shifts of the coupled nuclei is greater than ten times J are called first-order spin systems. These nuclei are weakly coupled, and their chemical shifts and coupling constant can generally be estimated from the well-separated signals in the spectrum.
As Δν decreases and the signals move closer, the doublets appear increasingly distorted. The intensities of the inner lines increase at the cost of those of the outer lines as the signals are...
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Insensitive Nuclei Enhanced by Polarization Transfer (INEPT)01:15

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Insensitive Nuclei Enhanced by Polarization Transfer (INEPT) is an advanced Nuclear Magnetic Resonance (NMR) technique specifically designed to detect and enhance the signals of low-abundance nuclei, such as carbon-13 and nitrogen-15, in small molecules. The fundamental principle behind INEPT is the transfer of polarization from a more abundant and highly polarizable nucleus, typically hydrogen-1, to the low-abundance nucleus of interest. This process effectively boosts the NMR signal of the...
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NMR Spectrometers: Radiofrequency Pulses and Pulse Sequences01:17

NMR Spectrometers: Radiofrequency Pulses and Pulse Sequences

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A pulse is a short burst of radio waves distributed over a range of frequencies that simultaneously excites all the nuclei in the sample. Upon passing a radio frequency pulse along the x-axis, the nuclei absorb energy corresponding to their Larmor frequencies and achieve resonance. This shifts the net magnetization vector from the z-axis toward the transverse plane. This angle of rotation of the magnetization vector, or the flip angle, is proportional to the duration and intensity of the pulse.
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Related Experiment Video

Updated: Mar 12, 2026

Author Spotlight: Exploring Intrinsically Disordered Protein Dynamics Through NMR Relaxation Experiments
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Correction: Achieving high resolution and optimizing sensitivity in spatial frequency encoding NMR spectroscopy: from

Bertrand Plainchont1, Daisy Pitoux1, Ghanem Hamdoun1

  • 1Equipe de RMN en milieu orienté, ICMMO, UMR 8182 (CNRS-UPS), Université Paris-Saclay, 91405 Orsay cedex, France. nicolas.giraud@u-psud.fr.

Physical Chemistry Chemical Physics : PCCP
|November 8, 2016
PubMed
Summary

This correction clarifies a previous study on spatial frequency encoding Nuclear Magnetic Resonance (NMR) spectroscopy. It ensures accurate understanding of achieving high resolution and optimizing sensitivity in NMR experiments.

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Area of Science:

  • Physical Chemistry
  • Spectroscopy
  • Nuclear Magnetic Resonance

Background:

  • Spatial frequency encoding Nuclear Magnetic Resonance (NMR) spectroscopy offers advanced capabilities.
  • Previous work explored achieving high resolution and optimizing sensitivity in this technique.

Purpose of the Study:

  • To provide a correction to the published article 'Achieving high resolution and optimizing sensitivity in spatial frequency encoding NMR spectroscopy: from theory to practice'.
  • To ensure the accuracy of theoretical and practical aspects discussed in the original publication.

Main Methods:

  • Correction of specific details within the original theoretical framework.
  • Clarification of practical implementation aspects related to spatial frequency encoding in NMR.

Main Results:

  • The correction addresses potential ambiguities or errors in the original presentation.
  • Ensures the presented methods for high resolution and sensitivity optimization are correctly understood.

Conclusions:

  • Accurate understanding of spatial frequency encoding NMR spectroscopy is crucial for its advancement.
  • This correction facilitates reliable application and further development of the technique.