Download or read book Solid state NMR Characterization of Polymeric and Inorganic Materials written by Jessi A. Baughman and published by . This book was released on 2015 with total page 173 pages. Available in PDF, EPUB and Kindle. Book excerpt: Multiple systems were studied to advance the understanding of the chemical composition of the materials. These materials contained various structures or structures within different physical phases. Solid-state NMR techniques were used to probe effects of different chemical processes and environmental conditions on the chemical structures and phase composition of these materials. Much of the high thermal and chemical resistance of poly(vinylidene-cohexafluoropropylene) is gained from cross-linking. The insolubility of the cross-linked fluoroelastomer has prevented the characterization of the structure at the cross-link site by NMR. Samples from each of the four stages of the cross-linking of poly(vinylideneco-hexafluoropropylene) were analyzed with solid-state NMR to determine the chemical structure at the cross-linking site and the effects of cross-linking on the mobility of the elastomer chains. Spectral overlap from chemical shift dispersion hindered the use of simple 1D techniques to assign structural components to peaks in the NMR spectra. Relaxation studies that measured T1, T2, and T1[subscript p] relaxation times were used to assign new peaks in the NMR spectra to the fluoride salts that are produced during cross-linking. The NMR relaxation data also indicated no reduction in the mobility of the fluoroelastomer from cross-linking. The chemical structure of the cross-link site was partially characterized by 2D-NMR. However, the amorphous nature of the polymer inhibited a full characterization of this location with 2D-NMR techniques. The structures that were identified at the cross-link site supported proposed structures. Solutions of NaCl and dextrose used in the preservation of premixed drugs were analyzed to distinguish the solid and liquid phases over a temperature range of -60 to 20 °C. The large chemical shift dispersion in the NMR spectra made analysis of the frequency domain data difficult. The time domain data of the single pulse NMR experiments were analyzed using a logarithmic fitting technique and the inverse LaPlace transform. The logarithmic fit technique was able to distinguish a single solid and a single liquid phase for the NaCl and dextrose solutions. The inverse LaPlace transform indicated the presence of three phases near the center of the temperature range. The additional phase was assigned to a liquid phase of concentrated solution based on the T2 time of the phase found by the inverse LaPlace transform. The two methods gave similar results and were used to identify the percentage of each phase present throughout the temperature range. 33S solid-state NMR was used to characterize the discharge products of a lithium-sulfur battery. A single pulse experiment with a solid echo was used to help minimize the broadening effects of the quadrupolar interactions in 33S. Li2S was detected in the cathode of the fully discharged battery. Longer lithium sulfide polymer chains expected at higher discharge potentials were not detected due to large line widths in the NMR spectrum and small sample size that severely reduced the signal-to-noise. A reduced signal-to-noise spectrum of natural abundance, elemental sulfur suggested an isotropic chemical shift at -50 ppm.
Download or read book NMR Methods for Characterization of Synthetic and Natural Polymers written by Rongchun Zhang and published by Royal Society of Chemistry. This book was released on 2019-07-29 with total page 590 pages. Available in PDF, EPUB and Kindle. Book excerpt: Since the introduction of FT-NMR spectroscopy around five decades ago, NMR has achieved significant advances in hardware and methodologies, accompanied with the enhancement of spectral resolution and signal sensitivity. Rapid developments in the polymers field mean that accurate and quantitative characterization of polymer structures and dynamics is the keystone for precisely regulating and controlling the physical and chemical properties of the polymer. This book specifically focuses on NMR investigation of complex polymers for the polymer community as well as NMR spectroscopists, and will push the development of both fields. It covers the latest advances, for example high field DNP and ultrafast MAS methodologies, and show how these novel NMR methods characterize various synthetic and natural polymers.
Download or read book A Characterization of Organic and Inorganic Polymeric Materials by Solid state NMR written by Jennifer L. Rapp and published by . This book was released on 2007 with total page 156 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Alumina nanofibers, having average diameters of 500 nm, have been fabricated via the electrospinning process. Annealing the as-spun nanofibers at temperatures ranging from 525°C-1200 °C was found to produce intermediate forms of alumina, transition aluminas before conversion into the thermodynamically stable phase, a-alumina. An in depth characterization of these alumina nanofibers via solid-state nuclear magnetic resonance (SSNMR) and other characterization techniques provide valuable information about the bulk and surface properties of these alumina nanofibers. As the surface of alumina materials have been known to have chemical and catalytic capabilities, the reactive nature of these alumina nanofibers were studied by the adsorption of phosphorus compounds on the surface of the nanofibers. Two phosphorus containing compounds were used; a chemical warfare agent simulant, dimethylmethyl phosphonate (DMMP) and methyl phosphate. The interaction of these materials with the surface of the alumina nanofibers were studied by SSNMR. Protonation (doping) of polyaniline, with a protonic acid renders it conducting, altering its electronic and structural properties. One of the highest reported conductivities of doped polyaniline is when it is doped with camphorsulfonic acid (HCSA) and cast from a m-cresol solution. Several models of the crystal structure of this system have been proposed, however they have not been proven experimentally. Solid-state NMR has been used to investigate the structure and specific interactions that occur between the dopant and/or solvent within the conducting polymer system. The structure of polyaniline synthesized in the presence of a polyacid, poly-2-acrylamido-2-methyl-1-propanesulfonic acid (PAAMPSA) was also investigated, by the used of solid-state NMR."--Abstract.
Download or read book Solid State NMR of Polymers written by T. Asakura and published by Elsevier. This book was released on 1998-08-03 with total page 1017 pages. Available in PDF, EPUB and Kindle. Book excerpt: In polymer science and technology, the advanced development of various new polymer materials with excellent properties and functions is desirable. For this purpose it is necesary to determine the exact relationship between physical properties and molecular structure-dynamics with powerful techniques. One such technique is solid state NMR. Recently, high resolution NMR studies of solids have been realized by using advanced pulse and mechanical techniques, which has resulted in a variety of structural and dynamical information on polymer systems. Solid state NMR has provided characteristic information which cannot be obtained by other spectroscopic methods.This book is divided into two parts. The first part covers the principles of NMR, important NMR parameters such as chemical shifts, relaxation times, dipolar interactions, quadrupolar interactions, pulse techniques and new NMR methods. In the second part, applications of NMR to a variety of polymer systems in the solid state are described.Features of this book:• Contains an up-to-date and comprehensive account of solid state NMR of polymers by leading researchers in the field• Provides a compilation of solid state NMR of polymers, which makes it an ideal reference book for both NMR researchers and general polymer scientists.This book will be of interest to the NMR community, and will be invaluable for both the beginner and the expert.
Download or read book Solid State NMR of Polymers written by L.J. Mathias and published by Springer Science & Business Media. This book was released on 2013-06-29 with total page 406 pages. Available in PDF, EPUB and Kindle. Book excerpt: The chapters in this collection are from papers which were presented at a symposium on solid-state NMR of polymers. A two-part program on available NMR techniques applicable to solid polymer analysis was presented at the 3rd Chemical Congress of North American held in Toronto, Ontario, June 5-10,1988. The program was sponsored by the Division of Polymer Chemistry with support provided by the Division, its Industrial Sponsors, and the Donors of the Petroleum Research Fund administered by the American Chemical Society. Co-organizers included Professor Colin Fyfe of the University of British Columbia (Vancouver, Canada), Professor Hans Spiess of the Max Planck Institut fur Polymerforschung (Mainz, West Germany), and myself. The full-day tutorial, which was free to registered attendees, covered the range of topics. The purpose of the tutorial was to provide a basic introduction to the field so that newcomers to its present and future applications could develop sufficient understanding to learn effectively from the subsequent symposium. The first talk attempted to give listeners a feel for the way a novice spectroscopist can learn to use the various NMR techniques to explore his own areas of interest. Simple experiments can provide unique information about solid polymers that can be useful in interpreting synthetic results and in relating solid-state conformation, morphology and molecular motion to physical properties.
Download or read book Solid state NMR Characterization of Glassy Amorphous and Crystalline Inorganic Materials written by Josef Maximilian Gerdes and published by . This book was released on 2023 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Characterization of Polymers in the Solid State I Part A NMR and Other Spectroscopic Methods Part B Mechanical Methods written by H.H. Kausch and published by Springer. This book was released on 2014-03-12 with total page 224 pages. Available in PDF, EPUB and Kindle. Book excerpt: Pt. A: NMR and other Spectroscopic Methods. Pt. B: Mechanical Methods
Download or read book Structural Characterization of Complex Inorganic Materials Using Solid state NMR Spectroscopy written by Hua Guo and published by . This book was released on 2021 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book NMR Methods for Characterization of Synthetic and Natural Polymers written by Rongchun Zhang and published by Royal Society of Chemistry. This book was released on 2019-08-02 with total page 590 pages. Available in PDF, EPUB and Kindle. Book excerpt: Since the introduction of FT-NMR spectroscopy around five decades ago, NMR has achieved significant advances in hardware and methodologies, accompanied with the enhancement of spectral resolution and signal sensitivity. Rapid developments in the polymers field mean that accurate and quantitative characterization of polymer structures and dynamics is the keystone for precisely regulating and controlling the physical and chemical properties of the polymer. This book specifically focuses on NMR investigation of complex polymers for the polymer community as well as NMR spectroscopists, and will push the development of both fields. It covers the latest advances, for example high field DNP and ultrafast MAS methodologies, and show how these novel NMR methods characterize various synthetic and natural polymers.
Download or read book Characterization of Polymeric Materials by Solid State Carbon 13 Nuclear Magnetic Resonance Spectroscopy written by Ashok L. Cholli and published by . This book was released on 1983 with total page 702 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Multidimensional Solid State NMR and Polymers written by Klaus Schmidt-Rohr and published by Elsevier. This book was released on 2012-12-02 with total page 501 pages. Available in PDF, EPUB and Kindle. Book excerpt: NMR spectroscopy is the most valuable and versatile analytical tool in chemistry. While excellent monographs exist on high-resolution NMR in liquids and solids, this is the first book to address multidimensional solid-state NMR. Multidimensional techniques enable researchers to obtain detailed information about the structure, dynamics, orientation, and phase separation of solids, which provides the basis of a better understanding of materials properties on the molecular level.Dramatic progress-much of it pioneered by the authors-has been achieved in this area, especially in synthetic polymers. Solid-state NMR now favorably competes with well-established techniques, such as light, x-ray, or neutron scattering, electron microscopy, and dielectric and mechanical relaxation.The application of multidimensional solid-state NMR inevitably involves use of concepts from different fields of science. This book also provides the first comprehensive treatment of both the new experimental techniques and the theoretical concepts needed in more complex data analysis. The text addresses spectroscopists and polymer scientists by treating the subject on different levels; descriptive, technical, and mathematical approaches are used when appropriate. It presents an overview of new developments with numerous experimental examples and illustrations, which will appeal to readers interested in both the information content as well as the potential of solid-state NMR. The book also contains many previously unpublished details that will be appreciated by those who want to perform the experiments. The techniques described are applicable not only to the study of synthetic polymers but to numerous problems in solid-state physics, chemistry, materials science, and biophysics. - Presents original theories and new perspectives on scattering techniques - Provides a systematic treatment of the whole subject - Gives readers access to previously unpublished material - Includes extensive illustrations
Download or read book Solid State Nmr of Polymers written by P. Mirau and published by iSmithers Rapra Publishing. This book was released on 2001 with total page 160 pages. Available in PDF, EPUB and Kindle. Book excerpt: NMR spectroscopy has emerged as one of the most important methods for the solid-state characterisation of polymers. This report gives an overview of the methods and applications of NMR to relevant polymer problems with an emphasis on how NMR can be used for materials characterisation and to understand structure-property relationships in polymers. An additional indexed section containing several hundred abstracts from the Rapra Polymer Library database gives useful references for further reading.
Download or read book Solid State NMR III Organic Matter written by Bernhard Blümich and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 218 pages. Available in PDF, EPUB and Kindle. Book excerpt: Solid-State NMR is a branch of Nuclear Magnetic Resonance which is presently experiencing a phase of strongly increasing popularity. The most striking evidence is the large number of contributions from Solid-State Resonance atNMR meetings, approaching that ofliquid state resonance. Important progress can be observed in three areas: Methodological developments, applications to inorganic matter, and applications to organic matter. These developments are intented to be captured in three volumes in this series, each of them being devoted to more or less one of these areas. The present volume on Solid-State NMR III is devoted mainly to organic matter. The recent developments of deuteron NMR and their applications are reviewed in the first chapter. Crosspolarization, MAS, and dynamic angle spinning are being explored for enhancement of information and sensitivity. In addition to the analysis of classical relaxation times and modern 2D spectra, detailed dynamic information becomes accessible from investigations of the relaxation time anisotropies. The second chapter examines cross-polarization in static and rotating solids under conditions of spin diffusion and thermal motion. The underlying dipole-dipole interaction is further exploited by the techniques described in the third chapter for studies of polymer-polymer miscibility. Short range techniques are discriminated from long-range techniques based on spin diffusion. The use ofthese techniques is illustrated by a case study ofPMMAJPVF blends. The last chapter addresses novel z methods and applications of two-dimensional exchange NMR for investigations of relative molecular orientations, polymer morphology, molecular dynamics, and macroscopic molecular order.
Download or read book Solid State NMR in Zeolite Catalysis written by Jun Xu and published by Springer. This book was released on 2019-05-11 with total page 260 pages. Available in PDF, EPUB and Kindle. Book excerpt: Solid-State NMR Characterization of Heterogeneous Catalysts and Catalytic Reactions provides a comprehensive account of state-of-the-art solid-state NMR techniques and the application of these techniques in heterogeneous catalysts and related catalytic reactions. It includes an introduction to the basic theory of solid-state NMR and various frequently used techniques. Special emphasis is placed on characterizing the framework and pore structure, active site, guest-host interaction, and synthesis mechanisms of heterogeneous catalysts using multinuclear one- and two-dimensional solid-sate NMR spectroscopy. Additionally, various in-situ solid-state NMR techniques and their applications in investigation of the mechanism of industrially important catalytic reactions are also discussed. Both the fundamentals and the latest research results are covered, making the book suitable as a reference guide for both experienced researchers in and newcomers to this field. Feng Deng is a Professor at Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences.
Download or read book Solid State NMR written by Klaus Müller and published by John Wiley & Sons. This book was released on 2021-08-23 with total page 562 pages. Available in PDF, EPUB and Kindle. Book excerpt: Solid State NMR A thorough and comprehensive textbook covering the theoretical background, experimental approaches, and major applications of solid-state NMR spectroscopy Nuclear Magnetic Resonance (NMR) spectroscopy is a powerful non-destructive technique capable of providing information about the molecular structure and dynamics of molecules. Alongside solution-state NMR, a well-established technique to study chemical structures and investigate physico-chemical properties of molecules in solutions, solid-state NMR (SSNMR) offers many exciting possibilities for the analysis of solid and soft materials across scientific fields. SSNMR shows unique capabilities for a detailed investigation of structural and dynamic properties of materials over wide space and time ranges. For this reason, and thanks to significant advances in the past several years, the application of SSNMR to materials is rapidly increasing in disciplines such as chemistry, physics, and materials and life sciences. Solid State NMR: Principles, Methods, and Applications offers a systematic introduction to the theory, methodological concepts, and major experimental methods of SSMR spectroscopy. Exploring the unique potential of SSNMR for the structural and dynamic characterization of soft and either amorphous or crystalline solid materials, this comprehensive textbook provides foundational knowledge and recent developments of SSNMR, covering physical and theoretical background, experimental methods, and applications to pharmaceuticals, polymers, inorganic and hybrid materials, liquid crystals, and model membranes. Written by two expert authors to ensure a clear and consistent presentation of the subject, this textbook: Includes a brief introduction to the historical aspects and broad theoretical background of solid-state NMR spectroscopy Provides helpful illustrations to explain the various SSNMR concepts and methods Features accessible descriptive text with self-consistent use of quantum mechanics Covers the experimental aspects of SSNMR spectroscopy and in particular a description of many useful pulse sequences Contains references to relevant literature Solid State NMR: Principles, Methods, and Applications is the ideal textbook for university courses on SSNMR, advanced spectroscopies, and a valuable single-volume reference for spectroscopists, chemists, and researchers in the field of materials.
Download or read book A Guide to Materials Characterization and Chemical Analysis written by John P. Sibilia and published by John Wiley & Sons. This book was released on 1996-12-17 with total page 404 pages. Available in PDF, EPUB and Kindle. Book excerpt: Written both for the novice and for the experienced scientist, this miniature encyclopedia concisely describes over one hundred materials methodologies, including evaluation, chemical analysis, and physical testing techniques. Each technique is presented in terms of its use, sample requirements, and the engineering principles behind its methodology. Real life industrial and academic applications are also described to give the reader an understanding of the significance and utilization of technique. There is also a discussion of the limitations of each technique.
Download or read book Characterisation of Inorganic Materials Using Solid state NMR Spectroscopy written by and published by . This book was released on 2016 with total page 392 pages. Available in PDF, EPUB and Kindle. Book excerpt:
