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NMR Spectrometers: Overview

NMR Spectrometers: Overview

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...

NMR Spectroscopy of Aromatic Compounds

NMR Spectroscopy of Aromatic Compounds

Aromatic compounds can be identified or analyzed using proton NMR and carbon‐13 NMR. Typically, aromatic hydrogens or hydrogens directly bonded to the aromatic rings are strongly deshielded by the aromatic ring current. Therefore, they absorb in the range of 6.5–8.0 ppm in proton NMR spectra. For instance, aromatic hydrogens directly bonded to the benzene ring absorb at 7.3 ppm. However, aromatic hydrogens of larger rings absorb farther upfield or downfield than the ideal range. Consider...

Applications Of NMR In Biology

Applications Of NMR In Biology

Nuclear magnetic resonance (NMR) spectroscopy is a very valuable analytical technique for researchers. It has been used for more than 50 years as an analytical tool. F. Bloch and E. Purcell formulated NMR in 1946 and won the 1952 Nobel Prize in Physics for their work. Biological macromolecules such as proteins, nucleic acids, lipids, and organic molecules including pharmaceutical compounds, can be studied using this versatile tool that exploits the magnetic properties of certain nuclei.
The...

Two-Dimensional (2D) NMR: Overview

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The 1D NMR spectrum of large and complex molecules like natural products has complicated splitting patterns and overlapping signals, which can be easily interpreted using 2-dimensional (2D) NMR. Unlike 1D NMR, 2D NMR has two frequency axes that provide the coupling information between the nucleus A and nucleus B in a molecule. The process from which 2D spectra are obtained has four steps.
The first step is the preparation period, during which nucleus A is excited with a radiofrequency pulse.

NMR Spectroscopy Of Amines

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In proton NMR spectroscopy, primary amines and secondary amines showcase their N–H protons as a broad signal in the chemical shift range between δ 0.5 and 5 ppm. The exact position in this range depends on several factors, including sample concentration, hydrogen bonding, and the type of solvent used. Since amine protons undergo fast proton exchange in solution, the protons are labile and therefore do not participate in any splitting with adjacent protons. Thus, the observed peak is broad and...

¹H NMR Signal Multiplicity: Splitting Patterns

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When protons A and X are coupled, their nuclear spin energy levels are slightly modified. This is because the energy required to excite proton A to a spin state parallel to proton X is slightly different from the energy required for it to become anti-parallel to spin X. Consequently, there are two possible excitation frequencies for A (A1 and A2), depending on the spin state of X, and vice versa. The mutual nature of coupling implies that the difference between frequencies A1 and A2, indicated...

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Related Experiment Video

Updated: May 13, 2026

Revised and Neuroimaging-Compatible Versions of the Dual Task Screen

Revised and Neuroimaging-Compatible Versions of the Dual Task Screen

Published on: October 5, 2020

Nmrglue: an open source Python package for the analysis of multidimensional NMR data.

Jonathan J Helmus¹, Christopher P Jaroniec

¹Department of Chemistry and Biochemistry, The Ohio State University, 100 West 18th Avenue, Columbus, OH 43210, USA. jjhelmus@gmail.com

Journal of Biomolecular NMR

|March 5, 2013

Summary

This summary is machine-generated.

Nmrglue is an open-source Python package designed for processing and analyzing multidimensional NMR data. It offers a flexible environment for spectral analysis, data conversion, and developing novel NMR methods.

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Area of Science:

Chemistry
Biophysics
Data Science

Background:

Nuclear Magnetic Resonance (NMR) spectroscopy is a powerful technique for structural elucidation.
Processing and analyzing multidimensional NMR data can be complex and computationally intensive.
Existing software often lacks flexibility and interoperability for advanced NMR data analysis.

Purpose of the Study:

To introduce nmrglue, an open-source Python package for handling multidimensional NMR data.
To provide a flexible and robust environment for NMR spectral processing, analysis, and visualization.
To facilitate the integration of various NMR data formats and processing methods.

Main Methods:

Development of the nmrglue Python package.
Integration with other scientific Python libraries for enhanced functionality.
Implementation of common NMR utilities (e.g., linear prediction, peak picking, lineshape fitting).
Support for multiple NMR data file formats (Bruker, Varian, NMRPipe, etc.).

Main Results:

Nmrglue offers a versatile platform for manipulating raw NMR data.
The package enables automated quantitative analysis of complex NMR spectra, including biomacromolecular solid-state NMR.
Nmrglue supports the rapid development of unconventional data processing methods like covariance NMR.

Conclusions:

Nmrglue provides a flexible, open-source solution for advanced NMR data analysis.
Its compatibility with various file formats and processing methods enhances its utility for researchers.
The package is particularly valuable for complex analyses and the development of new NMR techniques.