PatentDOI
Indirect detection of magnetic resonance by heteronuclear two-dimensional spectroscopy
TLDR
In this article, a method for highly sensitive indirect detection of nuclear magnetic resonance of nuclei having a low gyromagnetic ratio using pulse techniques is presented, which employs a coherent transfer of transverse magnetization from the nuclei of interest to nuclei with high gyromagnetic ratio for which the free induction decay, S (t 2 ), is observed as a function of the length of the time interval, t 1, between imposition of transversal magnetization upon the nucleus of interest and transfer of magnetization to the observed nuclei.About:
This article is published in Chemical Physics Letters.The article was published on 1978-06-05. It has received 378 citations till now. The article focuses on the topics: Relaxation (NMR) & Ferromagnetic resonance.read more
Citations
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Journal ArticleDOI
Coherence transfer by isotropic mixing: Application to proton correlation spectroscopy
Journal ArticleDOI
Natural abundance nitrogen-15 NMR by enhanced heteronuclear spectroscopy
Geoffrey Bodenhausen,D. J. Ruben +1 more
TL;DR: In this article, the detection of NMR spectra of less sensitive nuclei coupled to protons was improved by a 2-dimensional Fourier transform technique involving a double transfer of polarization.
Journal ArticleDOI
Correlation of proton and nitrogen-15 chemical shifts by multiple quantum NMR☆
TL;DR: In this paper, the correlation of 1H and 15N chemical shifts based on zero and double quantum NMR is discussed. And the indirect determination of nitrogen shifts from the proton signals provides a dramatic gain in sensitivity over direct observation of 15N signals, and examples are given of applications of the methods to samples with natural abundance 15N concentration and to a sample of 0.7 mM 65% 15N enriched tRNA in H2O.
Journal ArticleDOI
Investigation of complex networks of spin-spin coupling by two-dimensional NMR
Ad Bax,Ray Freeman +1 more
TL;DR: In this paper, the two-dimensional Fourier transform was applied to a sample of 9-hydroxytricyclodecan-2,5-dione.
Journal ArticleDOI
Product operator formalism for the description of NMR pulse experiments
TL;DR: In this article, the authors propose a method for analyzing experiences en impulsions: modeles vectoriels classiques and semi-classiques, approches par operateur densite and operateur produit.
References
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Journal ArticleDOI
Two‐dimensional spectroscopy. Application to nuclear magnetic resonance
TL;DR: In this article, the possibilities for the extension of spectroscopy to two dimensions are discussed, including the elucidation of energy level diagrams, the observation of multiple quantum transitions, and the recording of high-resolution spectra in inhomogenous magnetic fields.
Journal ArticleDOI
Proton‐Enhanced Nuclear Induction Spectroscopy. A Method for High Resolution NMR of Dilute Spins in Solids
Journal ArticleDOI
Use of Weak Perturbing Radio‐Frequency Fields in Nuclear Magnetic Double Resonance
R. Freeman,W. A. Anderson +1 more
TL;DR: In this article, a theory is developed to explain high-resolution nuclear magnetic resonance spectra observed in the presence of a second weak rf field at ω 2, where ω2 is set on a nondegenerate transition frequency and the rest of the spectrum recorded by sweeping the frequency of the investigating rf fields will be split into doublets.
Journal ArticleDOI
14N NQR Spectroscopy of Some Amino Acids and Nucleic Bases via Double Resonance in the Laboratory Frame
TL;DR: The 14N nuclear quadrupole resonance spectra and spin-lattice relaxation times of the amino acids histidine, methionine, cystine, Cysteine and tyrosine as well as of the nucleic bases uracil, thymine, cytosine, and guanine have been determined by a 14N-proton double resonance technique in the laboratory frame as mentioned in this paper.
Patent
Gyromagnetic resonance spectroscopy employing spin echo spin-spin decoupling and two-dimensional spreading
TL;DR: In this paper, a method of gyromagnetic resonance spectroscopy is disclosed which simplifies the resultant spectra by eliminating spin-spin coupling effects, particularly useful for eliminating homonuclear spin spin coupling effects.
Related Papers (5)
Two‐dimensional spectroscopy. Application to nuclear magnetic resonance
Enhancement of nuclear magnetic resonance signals by polarization transfer
Gareth A. Morris,Ray Freeman +1 more