Nmr At Very High Field
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Nmr At Very High Field
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Author : J.B. Robert
language : en
Publisher: Springer Science & Business Media
Release Date : 2012-12-06
Nmr At Very High Field written by J.B. Robert and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-12-06 with Science categories.
In recent years several improvements have been made in the manufacturing of resistive, superconducting and hybrid mag nets. Condensed matter physicists are nowadays doing ex periments in steady magnetic fields of up to 30 Tesla. But the field homogenity {/B}, required in a volume of the order of a 3 few cm is usually several orders of magnitude less severe than the one which is needed for high resolution NMR. Over the last 30 years, with each generation of new high resolution NMR spectrometers, from 100 MHz up to 600 MHz, taking advan tage of the increase in sensitivity and resolution, new areas of research have been opened in chemistry, physical chemistry and biochemistry. The generation of the 20 Tesla supercon ducting magnets is coming. Thus one may seriously start to consider high resolution NMR at 1 GHz. The purpose of this volume is to examine some of the advantages which can be obtained at such high frequencies and some of the problems we shall be facing. An important aspect of NMR at high field which is not presented in this volume concerns the design of the magnet. The building of a superconducting magnet, producing a field 10 3 higher than 20 T, with a field homogeneity IlB/B 10- , in a cm volume still remains today in 1990 a major challenge. Grenoble, France J. B. Robert Guest-Editor Professor J. B. Robert Service National des Champs Intenses B. P.
Nmr At Very High Field
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Author :
language : en
Publisher: Springer
Release Date : 2012-04-23
Nmr At Very High Field written by and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-04-23 with Science categories.
In recent years several improvements have been made in the manufacturing of resistive, superconducting and hybrid mag nets. Condensed matter physicists are nowadays doing ex periments in steady magnetic fields of up to 30 Tesla. But the field homogenity {/B}, required in a volume of the order of a 3 few cm is usually several orders of magnitude less severe than the one which is needed for high resolution NMR. Over the last 30 years, with each generation of new high resolution NMR spectrometers, from 100 MHz up to 600 MHz, taking advan tage of the increase in sensitivity and resolution, new areas of research have been opened in chemistry, physical chemistry and biochemistry. The generation of the 20 Tesla supercon ducting magnets is coming. Thus one may seriously start to consider high resolution NMR at 1 GHz. The purpose of this volume is to examine some of the advantages which can be obtained at such high frequencies and some of the problems we shall be facing. An important aspect of NMR at high field which is not presented in this volume concerns the design of the magnet. The building of a superconducting magnet, producing a field 10 3 higher than 20 T, with a field homogeneity IlB/B 10- , in a cm volume still remains today in 1990 a major challenge. Grenoble, France J. B. Robert Guest-Editor Professor J. B. Robert Service National des Champs Intenses B. P.
Handbook Of High Field Dynamic Nuclear Polarization
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Author : Vladimir K. Michaelis
language : en
Publisher: John Wiley & Sons
Release Date : 2020-01-03
Handbook Of High Field Dynamic Nuclear Polarization written by Vladimir K. Michaelis and has been published by John Wiley & Sons this book supported file pdf, txt, epub, kindle and other format this book has been release on 2020-01-03 with Science categories.
Addresses Dynamic Nuclear Polarization (DNP) as a technique for sensitivity-enhancement in solid-state NMR spectroscopy This comprehensive handbook is a compendium of the current state-of-the art of high field Dynamic Nuclear Polarization—from long-proven, early developments, up to today’s hot topics. It covers all the relevant subjects that have made a direct or indirect contribution toward advancing this field, and focuses on topics such as: the theory behind the effects seen within DNP; instrumentation required for carrying out DNP; and specific applications of DNP including protein monitoring, catalysis, nanoparticles, biological and clinical studies. Development and application of techniques that have indirectly contributed to advancing MAS DNP NMR, such as DNP experiments on static solids within microwave resonant structures, and high-field EPR, are also examined. Handbook of High Field Dynamic Nuclear Polarization is presented in three sections—Theoretical Aspects, DNP Development (instrumentation / radical / sample), and DNP NMR Applications. The first section offers chapters on; solid and cross effect DNP; thermal mixing; Overhauser; and dissolution DNP. The second looks at: microwave technology, gyrotron, and IOE; homebuilt and commercial DNP spectrometers; and glassing vs. solvent-free DNP. The final section provides information on; amyloid, membrane, and nanocrystalline proteins; metals, and surface enhanced DNP; pharmaceuticals; nanoparticles; and much more. Covers one of the biggest developing fields in magnetic resonance Relevant to students, academics, and industry within the physical, materials, medical, and biochemical sciences An excellent starting point and point-of-reference for researchers in the field Edited by a widely respected team with contributions from key researchers in the NMR community Part of the eMagRes Handbook Series Handbook of High Field Dynamic Nuclear Polarization is an ideal reference for all researchers and graduate students involved in this complex, interdisciplinary field. About eMagRes Handbooks eMagRes publishes a wide range of online articles on all aspects of magnetic resonance in physics, chemistry, biology and medicine. The existence of this large number of articles, written by experts in various fields, is enabling the publication of a series of eMagRes Handbooks on specific areas of NMR and MRI. The chapters of each of these handbooks will comprise a carefully chosen selection of eMagRes articles. In consultation with the eMagRes Editorial Board, the eMagRes Handbooks are coherently planned in advance by specially-selected Editors, and new articles are written to give appropriate complete coverage. The handbooks are intended to be of value and interest to research students, postdoctoral fellows and other researchers learning about the scientific area in question and undertaking relevant experiments, whether in academia or industry. Have the content of this Handbook and the complete content of eMagRes at your fingertips! Visit: www.wileyonlinelibrary.com/ref/eMagRes
Long Lived States In High Field Nmr Spectroscopy For The Study Of Very Slow Dynamic Processes In Solution State
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Author : Riddhiman Sarkar
language : en
Publisher:
Release Date : 2009
Long Lived States In High Field Nmr Spectroscopy For The Study Of Very Slow Dynamic Processes In Solution State written by Riddhiman Sarkar and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2009 with categories.
Advances In Pulsed Zero Field Nmr
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Author : Tobias Fredrik Sjolander
language : en
Publisher:
Release Date : 2017
Advances In Pulsed Zero Field Nmr written by Tobias Fredrik Sjolander and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017 with categories.
Nuclear Magnetic Resonance (NMR) is ubiquitous as a tool for investigating the structure of both molecules and materials. In most cases the best results are obtained by placing the sample under study in the largest possible magnetic field, since this maximizes both the sensitivity and the resolution of the experiment. This fact underlies the momentous engineering effor that has gone into developing ever larger super-conducting magnets for use in NMR experiments. However, there are many applications of NMR where the sheer size, not to mention cost, of a high-field instrument can not be accommodated. Therefore there has been a sustained research effort aimed at developing small mobile NMR systems that are not based on super-conducting magnets. NMR performed in zero-field, using magnetic shielding to screen out the ambient field of the earth, and detected using vapor-cell magnetometers, is one such approach. In zero-field NMR the signal originates entirely in the spin-spin coupling part of the Hamiltonian and chemically informative spectra are obtained even in the absence of chemical-shifts. The very large absolute field homogeneity obtainable at zero-field ensures that the spectral resolution is even better than in high-field spectrometers. Perhaps even more interestingly, the different geometry that results from not having a preferred axis imposed on the system enables experiments that are not possible in the presence of magnetic fields. Examples include the ability to distinguish enantiomers based on the phase of an NMR signal. This work extends directly detected zero-field NMR beyond pulse-acquire type experiments. New methods for spin control and excitation, as well as two-dimensional spectroscopy and various decoupling techniques are introduced and demonstrated experimentally. For completeness this dissertation also contains a review of zero-field J-spectroscopy, as well as a detailed guide to the relevant instrumentation. It is my hope that the techniques presented herein will find use in future NMR experiments performed in the regime of zero and ultralow field, whether the application is portable chemical analysis, fundamental physics, or anything in between.
Solid State Nmr I Methods
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Author : B. Blümich
language : en
Publisher: Springer
Release Date : 1993-12-21
Solid State Nmr I Methods written by B. Blümich and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 1993-12-21 with Science categories.
Ultra High Resolution Nmr Methods And Its Applications
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Author : Upendra Singh
language : en
Publisher:
Release Date : 2023-01-15
Ultra High Resolution Nmr Methods And Its Applications written by Upendra Singh and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2023-01-15 with Science categories.
Ultra-high resolution nuclear magnetic resonance (NMR) methods refer to advanced techniques used to obtain detailed structural information about molecules. These methods use high-field magnets and specialized pulse sequences to achieve very high resolution in the NMR spectrum, allowing for the detection of very small chemical shifts and coupling constants. One of the main applications of ultra-high resolution NMR methods is in the study of biological macromolecules, such as proteins and nucleic acids. These methods can be used to determine the three-dimensional structure of these molecules, which is important for understanding their function and for drug design. Ultra-high resolution NMR methods can also be used for the study of small molecules. These methods can be used to determine the conformation of a molecule in solution, which is important for understanding the properties of a molecule and for designing new materials. In addition, ultra-high resolution NMR can be used for quantitative analysis of complex mixture. The high resolution of the spectrum allows for the detection of very small amounts of impurities or contaminants, and can also be used to determine the concentration of a component in a mixture. Overall, ultra-high resolution NMR methods are powerful tools that can provide detailed structural information about molecules and can be used in a wide range of applications, including biology, chemistry, and materials science. Nuclear magnetic resonance (NMR) spectroscopy is a potent analytical tool to comprehend physical and chemical nature (mobility, dynamics and kinetics) of small to medium size molecules for an extensive range of samples under variety of conditions such as temperature, concentration, and pH. A wealth of information related to molecular properties and interactions can be furnished by using NMR which could consequently provide utility in molecular structural identification. However, low sensitivity along with low resolution is a concern in application of NMR. Within the past few decades, NMR sensitivity has improved significantly through advancement in instrumentation as well as methodological developments. Recent upgrade in NMR instrumentation such as cryogenically cooled probes[1] has led to increase sensitivity and three to four-times better signal /noise ratio in comparison to room temperature probes leading to faster acquisition times and improved sensitivity. Resolution of spectrum is additionally improved in a high magnetic field which disperses the chemical shifts over the broad frequency range (in Hz). Nevertheless, signal overlaps continue being a limiting factor for characterizing complicated spectra. Therefore, a steady development of new pulse sequences and enhancements of the existing ones are of vital importance in improving the overall performance of NMR spectroscopy.
Principles Of High Resolution Nmr In Solids
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Author : M. Mehring
language : en
Publisher: Springer Science & Business Media
Release Date : 2012-12-06
Principles Of High Resolution Nmr In Solids written by M. Mehring and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-12-06 with Science categories.
The field of Nuclear Magnetic Resonance (NMR) has developed at a fascinating pace during the last decade. It always has been an extremely valuable tool to the organic chemist by supplying molecular "finger print" spectra at the atomic level. Unfortunately the high resolution achievable in liquid solutions could not be obtained in solids and physicists and physical chemists had to live with unresolved lines open to a wealth of curve fitting procedures and a vast amount of speculations. High resolution NMR in solids seemed to be a paradoxon. Broad structure less lines are usually encountered when dealing with NMR in solids. Only with the recent advent of mUltiple pulse, magic angle, cross-polarization, two-dimen sional and multiple-quantum spectroscopy and other techniques during the last decade it became possible to resolve finer details of nuclear spin interactions in solids. I have felt that graduate students, researchers and others beginning to get involved with these techniques needed a book which treats the principles, theo retical foundations and applications of these rather sophisticated experimental techniques. Therefore I wrote a monograph on the subject in 1976. Very soon new ideas led to the developement of "two-dimensional spectroscopy" and "multiple-quantum spectroscopy", topics which were not covered in the first edition of my book. Moreover an exponential growth of literature appeared in this area of research leaving the beginner in an awkward situation of tracing back from a current article to the roots of the experiment.
In Vivo Nmr Spectroscopy
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Author : Robin A. de Graaf
language : en
Publisher: John Wiley & Sons
Release Date : 2013-03-21
In Vivo Nmr Spectroscopy written by Robin A. de Graaf and has been published by John Wiley & Sons this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-03-21 with Science categories.
This is the second edition of a unique book in the field of in vivo NMR covering in detail the technical and biophysical aspects of the technique. The contents of the book are appropriate to both beginners and experienced users of in vivo NMR spectroscopy. The new edition is focussed on bringing the reader practical insights and advice, but is also geared towards use as a study aid and in NMR courses. Recent advances in NMR spectroscopy, like high field NMR, hyperpolarized NMR and new localization and editing techniques have been included. An extensive and updated treatment of radiofrequency pulses is given, together with several tables and recipes for their generation. Solutions to the exercises within this text can be found here
High Magnetic Field Science And Its Application In The United States
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Author : National Research Council
language : en
Publisher: National Academies Press
Release Date : 2013-11-25
High Magnetic Field Science And Its Application In The United States written by National Research Council and has been published by National Academies Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-11-25 with Science categories.
The Committee to Assess the Current Status and Future Direction of High Magnetic Field Science in the United States was convened by the National Research Council in response to a request by the National Science Foundation. This report answers three questions: (1) What is the current state of high-field magnet science, engineering, and technology in the United States, and are there any conspicuous needs to be addressed? (2) What are the current science drivers and which scientific opportunities and challenges can be anticipated over the next ten years? (3) What are the principal existing and planned high magnetic field facilities outside of the United States, what roles have U.S. high field magnet development efforts played in developing those facilities, and what potentials exist for further international collaboration in this area? A magnetic field is produced by an electrical current in a metal coil. This current exerts an expansive force on the coil, and a magnetic field is "high" if it challenges the strength and current-carrying capacity of the materials that create the field. Although lower magnetic fields can be achieved using commercially available magnets, research in the highest achievable fields has been, and will continue to be, most often performed in large research centers that possess the materials and systems know-how for forefront research. Only a few high field centers exist around the world; in the United States, the principal center is the National High Magnetic Field Laboratory (NHMFL). High Magnetic Field Science and Its Application in the United States considers continued support for a centralized high-field facility such as NHFML to be the highest priority. This report contains a recommendation for the funding and siting of several new high field nuclear magnetic resonance magnets at user facilities in different regions of the United States. Continued advancement in high-magnetic field science requires substantial investments in magnets with enhanced capabilities. High Magnetic Field Science and Its Application in the United States contains recommendations for the further development of all-superconducting, hybrid, and higher field pulsed magnets that meet ambitious but achievable goals.