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Tuesday, July 28, 2020 | History

2 edition of NMR study of quadrupolar nuclei in some simple cubic and perovskite compounds found in the catalog.

NMR study of quadrupolar nuclei in some simple cubic and perovskite compounds

# NMR study of quadrupolar nuclei in some simple cubic and perovskite compounds

Written in English

Edition Notes

Thesis (M.Phil.) - University of Warwick, 1990.

 ID Numbers Statement by V. Anuradha. Open Library OL20153593M

Nuclear magnetic resonance imaging, better known as magnetic resonance imaging (MRI) is an important medical diagnostic tool used to study the function and structure of the human body. It provides detailed images of any part of the body, especially soft tissue, in all possible planes and has been used in the areas of cardiovascular. Though 33 S NMR of solids is notoriously difficult due to its low γ, low natural abundance, and relatively large quadrupolar moment, working at the field of T it was possible to acquire, in a reasonable time, natural abundance 33 S SS NMR spectra of various H 2 S and SO 2 gas hydrates and inclusion compounds.

Get this from a library! NMR of Quadrupolar Nuclei in Solid Materials. [Roderick E Wasylishen; Sharon E Ashbrook; Stephen Wimperis;] -- Many important materials do not contain spin-1/2 nuclei traditionally investigated by NMR spectroscopy and secondly, dissolving solid materials in a solvent may be impossible or may destroy the. However, in eachinstance the nuclei in question were in highly symmetric environments, and-no large quadrupolar broadenings were noted. As a result, sub-stantial line narrowings wereachieved underfast magic-angle rotation conditions, because both the small dipolar and first-order quadrupolar broadenings (20, 21) wereeffectively aver-aged.

Principles of Nuclear Magnetic Resonance in One and Two Dimensions Richard R. Ernst, G. Bodenhausan, and A. Wokaun Oxford Science Publications () ISBN – Principles of Magnetic Resonance (3rd Enlarged and updated edition) C.P. Slichter Springer-Verlog () ISBN – 3rd ed. Protein NMR Specrascopy Principles and. 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 process occurs near resonance, when the oscillation frequency matches the intrinsic.

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The content of this volume has been added to eMagRes (formerly Encyclopedia of Magnetic Resonance) - the ultimate online resource for NMR and MRI. Over the past 20 years technical developments in superconducting magnet technology and instrumentation have increased the potential of NMR spectroscopy so that it is now possible to study a wide range of solid materials.

In addition, one can. Chem. SOC.Multiple-Quantum Magic- Angle Spinning NMR: A New Method for the Study of Quadrupolar Nuclei in Solids Ales Medek, John S.

Harwood, and Lucio Frydman" Department of Chemistry (M/C 11 l), University of Illinois at Chicago, W. Taylor Street, Chicago, Illinois Received Aug @. Most NMR‐observable nuclei have spin I > 1/2, and possess a quadrupole moment.

The resulting quadrupolar interaction severely broadens the resonances, but also encapsulates valuable information about the symmetry of the electronic surroundings of the observed by: High-Resolution NMR of Quadrupolar Nuclei Using Mixed Multiple-Quantum Coherences1 Alexej Jerschow, John W.

Logan, may in some cases have signiﬁcant advantages (8). An alternative approach, which we describe in the present A new method for the study of quadrupolar spins in. Grandinetti (L’Ohio State Univ.) Solid-State NMR of Quadrupolar Nuclei Jan.

10, 1 / 78 Most Abundant Isotope of Element with Odd Z is NMR Active General rule: for element with even atomic number (Z) its most abundant isotope. Quadrupolar nuclei are the most abundant nuclear magnetic resonance (NMR)-receptive nuclei in the Earth's crust, and in many amorphous materials of technological interest (such as zeolite.

Two theoretical approaches for spectral simulations, the perturbation method, and the direct diagonalization method, are discussed with examples of 17 O (I = 5/2), 33 S (I = 3/2), and 79/81 Br (I = 3/2) solid-state NMR analysis of organic compounds, as well as some examples of inorganic compounds with larger quadrupole interactions.

When the. Spectra of spin-1/2 nuclei coupled to quadrupolar nuclei 31PMAS-NMR of (CuI) P S quadrupolar nuclei Cu2 Cu2 S3 P MAS NMR of (CuI) 3 4 4 P3 P2 P3 P2 P2 S1 P1 S2 S2 P1 exp fit P1 80 60 Cu1 [ppm] G.

Brunklaus, J. C.C. Chan, H. Eckert, S. Reiser, T. Nilges, A. Pfitzner, Phys. Chem. Chem. Phys. 5, (). NMR resonance lines for quadrupolar nuclei are correspondingly broad and can be more difficult to study. Relevant properties of nuclei commonly found in biomolecules are summarized in Table For NMR spectroscopy of biomolecules, the most important nuclei with I = 1/2 are 1 H, 13 C, 15 N, 19 F, and 31 P; the most important nucleus with I.

Introduction to Quadrupolar NMR Sharon Ashbrook School of Chemistry, University of St Andrews. Interactions in NMR H Z Solids H rf H D H CS H Q H J Liquids I > 1/2.

Quadrupolar nuclei. Quadrupolar nuclei I = 1 Deuterium Lithium-6 Nitrogen I = 3/2 Lithium-7 Boron Sodium Chlorine Potassium Gallium Rubidium I = 5/2 Oxygen NMR of Quadrupolar Nuclei in SolidMaterials. EMR Handbooks. Based on theEncyclopedia of Magnetic Resonance(EMR), this monograph series focuses on hot topics and major developments in modern magnetic resonance and its many applications.

Each volume in the series will have a speciﬁc focus in either general NMR or MRI, with coverage of applications in the key scientiﬁc disciplines of. Since more that two-thirds of all NMR active isotopes are quadrupolar nuclei, applications of NMR spectroscopy with quadrupolar nuclei are increasing rapidly.

The purpose of this handbook is to provide under a single cover the fundamental principles, techniques and applications of quadrupolar NMR as it pertains to solid materials.

Theory. The chemical theory that underlies NMR spectroscopy depends on the intrinsic spin of the nucleus involved, described by the quantum number S. Nuclei with a non-zero spin are always associated with a non-zero magnetic moment, as described by Equation \ref{1}, where μ is the magnetic moment, $$S$$ is the spin, and γ is always non-zero.

The interest in studying quadrupolar nuclei with NMR is to combine useful chemical shift correlations with information concerning the quadrupole coupling constant. The value of χ depends on the nucleus itself (though the quadrupole moment Q), and on the maximum electric field gradient qzz.

The linewidth of peaks when taking NMR spectra of quadrupolar nuclei (11 B or 14 N for example) is often very broad, making their interpretation ly, when acquiring 11 B-NMR spectra of some boronic esters I'd made, the NMR technician pointed out that the linewidth is much improved in highly symmetrical environments (which my boronic esters were not) – she proved this by.

In this article, the reader is introduced to the fundamental concepts underlying NMR of quadrupolar nuclei in solid samples. In a section on the basic spin properties, the fundamental concepts of the nuclear quadrupolar coupling constant, the quadrupolar frequency, and the quadrupolar splitting are defined, while the characteristics of NMR and NQR spectra are introduced and compared.

In addition, approaches of the solid-state NMR traditionally used in the study of spin- nuclei have been adapted for use with quadrupolar nuclei, and some techniques, e.g. double-rotation (DOR. commonly studied quadrupolar nuclei with half-integer spins 27Al, 23Na and 17O. A few references to recent solid-state NMR studies of some other quadrupolar nuclei are also given.

2 BASIC THEORY At least three Cartesian coordinate systems were used for the description of the NMR. @article{osti_, title = {High-Resolution NMR of Quadrupolar Nuclei in the Solid State}, author = {Gann, Sheryl Lee}, abstractNote = {This dissertation describes recent developments in solid state nuclear magnetic resonance (NMR), for the most part involving the use of dynamic-angle spinning (DAS) NMR to study quadrupolar nuclei.

Chapter 1 introduces some of the basic concepts and. a mental substitution of the nuclei you are testing with an arbitrary label (your book uses X) what is the relationship of the compounds with the arbitrary label the labeled compounds are identical (or enantiomers), then the original nuclei are chemically equivalent and will normally give rise to a single resonance in the NMR.

Many important materials do not contain spin-1/2 nuclei traditionally investigated by NMR spectroscopy and secondly, dissolving solid materials in a solvent may be impossible or may destroy the integrity of the material. All these obstacles can be overcome by NMR experiments at high-magnetic field strengths and investigating the properties of quadrupolar nuclei.

Since more that two-thirds of all NMR active isotopes are quadrupolar nuclei, applications of NMR spectroscopy with quadrupolar nuclei are increasing rapidly.

The purpose of this handbook is to provide under a single cover the fundamental principles, techniques and applications of quadrupolar NMR as it pertains to solid materials.Abstract. We report the observation of high-resolution solid-state NMR spectra of 23 Na (I = [unk]), 27 Al (I = [unk]) and 51 V (I = [unk]) in various inorganic systems.

We show that, contrary to popular belief, relatively high-resolution (≈10 ppm linewidth) spectra may be obtained from quadrupolar systems, in which electric quadrupole coupling constants (e 2 qQ/h) are in the range ≈