Double Nuclear Resonance Spectroscopy of Rare Spins PDF Download

Author: Sven Richard Hartmann
Publisher:
ISBN:
Category : Nuclear magnetic resonance
Languages : en
Pages : 316

View

Book Description

Author: C.H. Wang
Publisher: Elsevier
ISBN: 0323153704
Category : Science
Languages : en
Pages : 371

View

Book Description
Spectroscopy of Condensed Media: Dynamics of Molecular Interactions discusses the use of molecular spectroscopy (including nuclear magnetic resonance [NMR] and nonlinear optical spectroscopy) in dynamic processes in condensed molecular systems. The book reviews relationship between transition probability and the time-correlation function of an isotropic electric dipole system, linear-response theory, and light scattering resulting from the translational motion of molecules in fluids. The text describes molecular rotation, theories of angular momentum, nuclear magnetic resonance, and spontaneous and coherent Raman effects. Closely related with the Raman and Brillouin scattering are vibrational dephasing, relaxation processes, and dynamics of phase transition solids. The book highlights the advantages of using NMR and also explains the basic concepts, such as local field, spin temperature, and effective Hamiltonians, that are employed in interpreting NMR experiments. The investigator can use nonlinear optical spectroscopy to study condensed matter. The text also cites two methods in which the investigator can control the time-dependent average Hamiltonian by (1) manipulating the intensity, timing, phase of the pulses, or (2) by sample spinning. The book is intended for advanced graduate students in physical chemistry that will equally benefit both investigators and scientists involved in physics research.

Author: Graham A. Webb
Publisher: Elsevier
ISBN: 0080461972
Category : Science
Languages : en
Pages : 288

View

Book Description
Nuclear magnetic resonance (NMR) is an analytical tool used by chemists and physicists to study the structure and dynamics of molecules. In recent years, no other technique has grown to such importance as NMR spectroscopy. It is used in all branches of science where precise structural determination is required and where the nature of interactions and reactions in solution is being studied. Annual Reports on NMR has established itself as a premier means for the specialist and nonspecialist alike to become familiar with new techniques and applications of NMR spectroscopy. * Includes comprehensive review articles on NMR Spectroscopy* Provides nonspecialists using this technology in all branches of science with the latest developments in the field* Keeps specialists up-to-date on the newest techniques in this important and fast-changing field

Author: Martha Bruch
Publisher: CRC Press
ISBN: 9780585374901
Category : Science
Languages : en
Pages : 634

View

Book Description
This work elucidates the power of modern nuclear magnetic resonance (NMR) techniques to solve a wide range of practical problems that arise in both academic and industrial settings. This edition provides current information regarding the implementation and interpretation of NMR experiments, and contains material on: three- and four-dimensional NMR; the NMR analysis of peptides, proteins, carbohydrates and oligonucleotides; and more.

Author: M. Mehring
Publisher: Springer Science & Business Media
ISBN: 3642963323
Category : Science
Languages : en
Pages : 257

View

Book Description
Manipulation and Dilution Tools for Ruling Abundant Species "NMR is dead" was the slogan heard in the late 1960s at least among physicists, until John S. Waugh and his co-workers initiated a series of new NMR experiments, which employed the coherent modulation of interactions by strong radiofrequency fields. A wealth of new phenomena was observed, which are summarized in the introduction for the convenience of the unbiased reader, whereas Section 2 collects the basic spin interactions observed in solids. Line-narrowing effects in dipolar coupled solids by the application of multiple pulse experiments are extensively discussed in Section 3. Numerous extensions of the basic Waugh, Huber, and Haeberlen experiment have been developed by different groups and have been applied to the nuclei IH, 9Be, 19F, 27Al, 31p, 63CU in solids. Application of this technique to a variety of systems is still in progress and should reveal interesting insights into weak spin interactions in solids. It was soon realized that rare spins could be used as monitors for molecular fields in the solid state; however, rare spin observation is difficult because of the small signal-to-noise ratio. Pines, Gibby, and Waugh introduced a new concept of cross-polarization, based on ideas of Hahn and co-workers, which allows the detection ofrare spins with increased sensitivity. The dynamics involved are treated in detail. Other sections merely list results obtained by the techniques described and demonstrate their usefulness in the investigation of dynamical problems in molec ular and solid state physics.

Author: Michael Edward Stoll
Publisher:
ISBN:
Category : Electronic dissertations
Languages : en
Pages : 187

View

Book Description
In the first part of this thesis, experiments utilizing an NMR phase interferometric concept are presented. The spinor character of two-level systems is explicitly demonstrated by using this concept. Following this is the presentation of an experiment which uses this same idea to measure relaxation times of off-diagonal density matrix elements corresponding to magnetic-dipole-forbidden transitions in a 13C-1H, AX spin system. The theoretical background for these experiments and the spin dynamics of the interferometry are discussed also. The second part of this thesis deals with NMR dipolar modulated chemical shift spectroscopy, with which internuclear bond lengths and bond angles with respect to the chemical shift principal axis frame are determined from polycrystalline samples. Experiments using benzene and calcium formate verify the validity of the technique in heteronuclear (13C-1H) systems. Similar experiments on powdered trichloroacetic acid confirm the validity in homonuclear (1H-1H) systems. The theory and spin dynamics are explored in detail, and the effects of a number of multiple pulse sequences are discussed. The last part deals with an experiment measuring the 13C chemical shift tensor in K2Pt(CN)4Br0.3 · 3H2O, a one-dimensional conductor. The 13C spectra are strongly affected by 14N quadrupolar interactions via the 13C -14N dipolar interaction. Single crystal rotation spectra are shown. An appendix discussing the design, construction, and performance of a single-coil double resonance NMR sample probe is included.

Author: R K Harris
Publisher: Royal Society of Chemistry
ISBN: 1847553575
Category : Science
Languages : en
Pages : 364

View

Book Description
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 comprehensive of the literature on this topic. This Specialist Periodical Report reflects the growing volume of published work involving NMR techniques and applications, in particular NMR of natural macromolecules which is covered in two reports: "NMR of Proteins and Acids" and "NMR of Carbohydrates, Lipids and Membranes". For those wanting to become rapidly acquainted with specific areas of NMR, this title provides unrivalled scope of coverage. Seasoned practitioners of NMR will find this an in valuable source of current methods and applications. Specialist Periodical Reports provide systematic and detailed review coverage in major areas of chemical research. Compiled by teams of leading authorities in the relevant subject areas, the series creates a unique service for the active research chemist, with regular, in-depth accounts of progress in particular fields of chemistry. Subject coverage within different volumes of a given title is similar and publication is on an annual or biennial basis.

Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages :

View

Book Description
Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.

Author:
Publisher: Academic Press
ISBN: 0080584063
Category : Science
Languages : en
Pages : 439

View

Book Description
This book is part of a series on spectroscopy, and covers NMR studies of isolated spin-pairs in the solid state, the oxidation state dependence of transition metal shieldings, the Cinderella nuclei, nuclear spin relaxation in organic systems, solutions of macromolecules and aggregates and the NMR of coals and coal products. Related titlesare volumes 20, 21 and 22 in the series.

Author: Narayanan Chandrakumar
Publisher: Springer Science & Business Media
ISBN: 1461246261
Category : Science
Languages : en
Pages : 396

View

Book Description
The magnetism of nuclear spin systems has proved an amazingly fertile ground for the creativity of researchers. This happy circumstance results from the triple benediction that nature appears to have bestowed on nuclear spins: they are sporting spies-being infinitely manipulable (one is even tempted to say malleable), not unduly coy in revealing their secrets, and having a whole treasure house of secrets to reveal in the first place. researcher with Since spin dynamics are now orchestrated by the NMR ever more subtle scores, it is important to be able to tune into the pro ceedings with precision, if one is to make sense of it at all. Fortunately, it is not terribly difficult to do so, since in many ways spin dynamics are the theoretician's dream come true: they are often finite dimensional and quite tractable with basic quantum mechanics, frequently allowing near exact treatments and readily testable predictions. This book was conceived two years ago, with the objective of providing a simple, consistent introduction to the description of the spin dynamics that one encounters in modern NMR experiments. We believed it was a good time to attempt this, since it was possible by then to give sufficiently general descriptions of powelful classes of new NMR experiments. The choice of experiments we discuss in detail is necessarily subjective, al though we hope to have given a flavor of most of the important classes of pulse sequences, including some surface coil imaging applications.