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Thursday, July 23, 2020 | History

2 edition of Pulsed nuclear magnetic resonance studies of quadrupolar nuclei in anisotropic fluids. found in the catalog.

Pulsed nuclear magnetic resonance studies of quadrupolar nuclei in anisotropic fluids.

Gina Lynn Hoatson

Pulsed nuclear magnetic resonance studies of quadrupolar nuclei in anisotropic fluids.

by Gina Lynn Hoatson

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Published by University of East Anglia in Norwich .
Written in English


Edition Notes

Thesis (Ph.D.)-University of East Anglia, School of Chemical Sciences, 1980.

ID Numbers
Open LibraryOL14512084M

Nuclear magnetic resonance (NMR), selective absorption of very high-frequency radio waves by certain atomic nuclei that are subjected to an appropriately strong stationary magnetic phenomenon was first observed in by the physicists Felix Bloch and Edward M. Purcell independently of each other. Nuclei in which at least one proton or one neutron is unpaired act like . Pulsed Nuclear Magnetic Resonance John Stoltenberg, David Pengra, Oscar Vilches, and Robert Van Dyck Department of Physics, University of Washington 15th Ave. NE, Seattle, WA 1 Background What we call “nuclearmagnetic resonance” (NMR) was developedsimultaneously but.

Nuclear magnetic resonance (NMR) is a property that magnetic nuclei have in a magnetic field and applied electromagnetic (EM) pulse or pulses, which cause the nuclei to absorb energy from the EM pulse and radiate this energy back energy radiated back out is at a specific resonance frequency which depends on the strength of the magnetic field and other factors. Experimental and theoretical research conducted in two areas in the field of nuclear magnetic resonance (NMR) spectroscopy is presented: (1) studies of the coherent quantum-mechanical control of the angular momentum dynamics of quadrupolar (spin I > 1/2) nuclei and its application to the determination of molecular structure; and (2) applications of the long-range nuclear dipolar field to .

From nuclear structure to the quadrupolar NMR interaction and high-resolution spectroscopy. / Jerschow, Alexej. In: Progress in Nuclear Magnetic Resonance Spectroscopy, Vol. 46, No. 1, , p. Research output: Contribution to journal › Review article. Experimental and theoretical research conducted in two areas in the field of nuclear magnetic resonance (NMR) spectroscopy is presented: (1) studies of the coherent quantum-mechanical control of the angular momentum dynamics of quadrupolar (spin I > 1/2) nuclei and its application to the determination of molecular structure; and (2.


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Pulsed nuclear magnetic resonance studies of quadrupolar nuclei in anisotropic fluids by Gina Lynn Hoatson Download PDF EPUB FB2

Pulsed nuclear magnetic resonance studies of quadrupolar nuclei in anisotropic fluids Author: Hoatson, G. ISNI: X Awarding Body: University of East Anglia Current Institution: University of East Anglia Date of Award: Availability of Full Text. magnetic resonance of quadrupolar nuclei and applications to biological systems Gang Wu Abstract: Recent advances in nuclear magnetic resonance (NMR) methodology and improvements in high-field NMR instrumentation have generated a new wave of research interests in the application of solid-state NMR to the study of quadrupolar nuclei.

Solid-state nuclear magnetic resonance (NMR) spectroscopy is mostly applied to 1H or 13C nuclei with the nuclear spin, but about of NMR isotopes have, and the electric quadrupole. of resonance phenomena|a resonance which involves the interaction between a nucleus with a magnetic eld, hence the name nuclear magnetic resonance.

In the quantum-mechanical picture for a single nucleus we can say that the probability of a \spin-ip" between the m I = +1=2 and m I = 1=2 state is maximized when the RF photon has energy equal to h.

One may well wonder whether a. The anisotropic character of the spin interactions plays a central role in defining the line shapes observed in both nuclear magnetic resonance NMR and electron paramag-netic resonance measurements in solids.1,2 Inhomogeneous broadenings such as those arising from the chemical shift, hyperfine, or quadrupolar anisotropies lead to characteristi.

Solid‐state nuclear magnetic resonance (SSNMR) spectroscopy has largely overtaken nuclear quadrupole resonance (NQR) spectroscopy for the study of quadrupolar nuclei. In addition to information on the electric field gradient, SSNMR spectra may offer additional information concerning other NMR interactions such as magnetic shielding.

Table of Nuclear Magnetic Dipole and Electric Quadrupole MomentsOxford Physics, Clarendon Laboratory Parks Road, OXFORD OX1 3PU U.K. This Table is a compilation of experimental measurements of static magnetic dipole and electric quadrupole moments of ground states and excited states of atomic nuclei throughout the periodic table.

Nuclear magnetic resonance studies of the semiconductors InSb and GaSb have revealed no quadrupolar interactions in our samples, indicating a high degree of crystalline perfection. the electrons surrounding the nuclei.

The magnitude of the magnetic field actu-ally experienced by the nuclei is slightly less than that of the applied field. Therefore, Eq. () should be modified as 6 1 Introduction to Nuclear Magnetic Resonance Tab.

NMR properties of some magnetic isotopes Isotope Resonance frequency* (MHz) Natural. The simple idea is that a spatially varying magnetic field encodes the positions of the spins in their resonance frequencies, and thus the number of spins at any given location may be directly measured as the intensity of the NMR signal at the corresponding resonance frequency.

As a spectroscopic method, Nuclear Magnetic Resonance (NMR) has seen spectacular growth over the past two decades, both as a technique and in its applications. Today the applications of NMR span a wide range of scientific disciplines, from physics to biology to medicine.

Each volume of Nuclear Magnetic Resonance comprises a combination of annual and biennial reports which together provide. QUADRUPOLAR NUCLEI IN SOLID-STATE NUCLEAR MAGNETIC RESONANCE 1 Quadrupolar Nuclei in Solid-state Nuclear Magnetic Resonance Dieter Freude Universitat Leipzig, Leipzig, Germany¨ 1 Introduction 1 2 Basic Theory 2 3 Excitation 5 4 Line Shape of Static and Magic-angle Spinning Nuclear Magnetic Resonance Spectra 7 5 Double-rotation and Dynamic.

Abstract. Experimental and theoretical research conducted in two areas in the field of nuclear magnetic resonance (NMR) spectroscopy is presented: (1) studies of the coherent quantum-mechanical control of the angular momentum dynamics of quadrupolar (spin I > 1/2) nuclei and its application to the determination of molecular structure; and (2) applications of the long-range nuclear.

The response, in the frequency domain, of half‐integral spin I>1 nuclei in anisotropic systems to the quadrupolar echo (QE) pulse sequence (π/2) x −τ−(π/2) y is investigated, with particular emphasis on the effects of quadrupolar relaxation.

Using a state multipole formalism, we derive the frequency spectra produced by one‐ or two‐dimensional Fourier transformation. 2D Quadrupolar-Echo Spectroscopy with Coherence Selection and Optimized Pulse Angle I. FURY* AND B. HALLE Department of Physical Chemistry I, University of Lund, Chemical Center, P.O.

BoxLund, Sweden Received October 2, 1 The recently developed 2D quadrupolar-echo (QE) method for relaxation studies on I r 1 nuclei in.

Nuclear magnetic resonance spectroscopy (NMR) is the most powerful tool for organic and organometallic compound determination. Even structures can be determined just using this technique. In general NMR gives information about the number of magnetically distinct atoms of the specific nuclei under study, as well as information regarding the.

In nuclear magnetic resonance (NMR) of I=1/2 nuclei that are scalar coupled to quadrupolar spins, a tensor operator product (TOP) basis set provides a convenient description of the time evolution of the density operator.

Expressions for the evolution of equivalent I=1/2 spins, coupled to an arbitrary spin S>1/2, were obtained by explicit algebraic density operator calculations in Mathematica. Pulsed NMR is used in magnetic resonance imaging (MRI).

Purcell and Bloch won the Nobel Prize in Physics in for NMR; more recently NMR was the subject of Nobel Prizes in Chem-istry in and We have both NMR setups in the advanced labs: one is a variation of the CWNMR method, and the other is a pulsed NMR system.

Nuclear magnetic resonance (NMR) is a method of physical observation in which nuclei in a strong constant magnetic field are perturbed by a weak oscillating magnetic field (in the near field and therefore not involving electromagnetic waves) and respond by producing an electromagnetic signal with a frequency characteristic of the magnetic field at the nucleus.

The third way in which enantiodifferentation can be observed in the NMR spectrum involves splitting of the resonances of quadrupolar nuclei such as 2 H. Quadrupolar splitting of the 2 H nucleus does not occur in solution when molecules rapidly tumble. Nuclear magnetic resonance, first demonstrated intakes advan-tage of the fact that certain atomic nu-clei possess magnetic dipole moments— that is, these nuclei act like tiny bar magnets, each with a north magnetic pole at one end and a south magnetic pole at the other.

The laws of quantum mechanics dictate that when such nu-clei are.Nuclear Magnetic Resonance Spectrum Paramagnetic Center Nuclear Overhauser Effect Radio Frequency Pulse Quadrupolar Nucleus These keywords were added by machine and not by the authors.

This process is experimental and the keywords may be .Solid State Nuclear Magnetic Resonance For central-transition spectra of half-integer quadrupolar nuclei in solids, line shape change due to with the anisotropic second-order quadrupolar shift (in many cases combined with chemical shift anisotropy).

We show here that an.