Download or read book A Solid State Deuterium Nuclear Magnetic Resonance Study of Molecular Motion in Urea N alkane Inclusion Compounds written by Gina M. Cannarozzi and published by . This book was released on 1995 with total page 362 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Encyclopedia of Supramolecular Chemistry written by J. L. Atwood and published by CRC Press. This book was released on 2004 with total page 1002 pages. Available in PDF, EPUB and Kindle. Book excerpt: Covers the fundamentals of supramolecular chemistry; supramolecular advancements and methods in the areas of chemistry, biochemistry, biology, environmental and materials science and engineering, physics, computer science, and applied mathematics.

Download or read book Encyclopedia of Supramolecular Chemistry Two Volume Set Print written by Jerry L. Atwood and published by CRC Press. This book was released on 2013-10-09 with total page 1745 pages. Available in PDF, EPUB and Kindle. Book excerpt: The two-volume Encyclopedia of Supramolecular Chemistry offers authoritative, centralized information on a rapidly expanding interdisciplinary field. User-friendly and high-quality articles parse the latest supramolecular advancements and methods in the areas of chemistry, biochemistry, biology, environmental and materials science and engineering, physics, computer science, and applied mathematics. Designed for specialists and students alike, the set covers the fundamentals of supramolecular chemistry and sets the standard for relevant future research.

Download or read book Dissertation Abstracts International written by and published by . This book was released on 1995 with total page 780 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Faculties Publications and Doctoral Theses in Chemistry and Chemical Engineering at United States Universities written by American Chemical Society. Committee on Professional Training and published by . This book was released on 1991 with total page 1646 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Physics briefs written by and published by . This book was released on 1989 with total page 840 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Solid State NMR Studies of the Guest Molecules in Urea Inclusion Compounds written by Xiaorong Yang and published by . This book was released on 2007 with total page 189 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis work deals with the investigation of the structural and dynamic properties of various guest species in urea inclusion compounds. Urea inclusion compounds are widely used in chemical analyses and syntheses. Studies of the molecular properties of the guest and host components are therefore of intrinsic scientific interest. Solid-state NMR spectroscopy is particularly suitable for the evaluation of the guest dynamics as well as the structural properties in such materials.The molecular behavior (dynamics, molecular order) of ?, ?-dibromoalkanes/urea inclusion compounds (CnH2nBr2, n = 6, 10, 11) with different selectively deuterated guest components was studied via solid-state 2H NMR spectroscopy, comprising variable-temperature line shape studies, spin-lattice and spin-spin relaxation experiments. In addition, the conformational properties were probed by high resolution solid-state 13C and 1H NMR experiments. For the long-chain guest systems (n = 10, 11), the guest dynamics at best can be described by the presence of overall reorientations around the channel axis (modeled by a non-degenerate jump motion) along with chain fluctuations. For the dibromohexane/urea inclusion compound, the guest species exclusively exist in distinct gauche conformations, which undergo exchange with rate constants that match the NMR time-scale. For comparison, the molecular properties of 1-bromodecane in urea have been studied as well. Both the molecular order and dynamics can be described in quite the same way as found for 1, 10-dibromodecane or 1, 11-dibromo- undecane in urea.Furthermore, this work reports on 1H and 13C CP/MAS NMR studies on urea inclusion compounds with various types of guest species (n-alkanes, alkane derivatives of different chain lengths). These studies include high-speed MAS experiments as well as T1? and T1 relaxation experiments. High resolution 1H and 13C spectra manifest that the guests in urea channels are of high mobility. From the T1? data, the motion of the guest on the microsecond time scale might be explained by chain fluctuations and lateral motion and the interaction between the guest and host is confirmed.

Download or read book The Multinuclear Approach to NMR Spectroscopy written by J.B. Lambert and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 552 pages. Available in PDF, EPUB and Kindle. Book excerpt: The field of nuclear magnetic resonance has experienced a number of spectacular developments during the last decade. Fourier transform methodology revolutionized signal acquisition capabilities. Superconducting magnets enhanced sensitivity and produced considerable improvement in spectral dispersion. In areas of new applicat ions, the life sciences particularly bene fited from these developments and probably saw the largest increase in usage. NMR imaging promises to offer a noninvasive alternative to X rays. High resolution is now achievable with solids, through magic angle spinning and cross polarization, so that the powers of NMR are applicable to previously intractable materials such as polymers, coal, and other geochemicals. The ease of obtaining relaxation times brought an important fourth variable, after the chemical shift, the coupling constant, and the rate constant, to the examination of structural and kinetic problems i~ all fields. Software development, particularly in the area of pulse sequences, created a host of useful tech niques, including difference decoupling and difference nuclear Overhauser effect spectra, multidimensional displays, signal enhancement (INEPT), coupling constant analysis for connectivity (INADEQUATE), and observation of specific structural classes such as only quaternary carbons. Finally, hardware development gave us access to the entire Periodic Table, to the particular advan tage of the inorganic and organometallic chemist. At the NATO Advanced Study Institute at Stirling, Scotland, the participants endeavored to examine all these advances, except imaging, from a multidisciplinary point of view.

Download or read book March s Advanced Organic Chemistry written by Michael B. Smith and published by John Wiley & Sons. This book was released on 2007-01-29 with total page 2379 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Sixth Edition of a classic in organic chemistry continues its tradition of excellence Now in its sixth edition, March's Advanced Organic Chemistry remains the gold standard in organic chemistry. Throughout its six editions, students and chemists from around the world have relied on it as an essential resource for planning and executing synthetic reactions. The Sixth Edition brings the text completely current with the most recent organic reactions. In addition, the references have been updated to enable readers to find the latest primary and review literature with ease. New features include: More than 25,000 references to the literature to facilitate further research Revised mechanisms, where required, that explain concepts in clear modern terms Revisions and updates to each chapter to bring them all fully up to date with the latest reactions and discoveries A revised Appendix B to facilitate correlating chapter sections with synthetic transformations

Download or read book Inclusion Phenomena in Inorganic Organic and Organometallic Hosts written by J.L Atwood and published by Springer Science & Business Media. This book was released on 1987 with total page 480 pages. Available in PDF, EPUB and Kindle. Book excerpt: Proceedings of the Fourth International Symposium on Inclusion Phenomena and the Third International Symposium on Cyclodextrins, Lancaster, UK, July 20-25, 1986

Download or read book Calixarenes 2001 written by M.-Z. Asfari and published by Springer. This book was released on 2010-12-06 with total page 684 pages. Available in PDF, EPUB and Kindle. Book excerpt: Calixarene chemistry, at the turn of the millennium, is a field approaching true maturity. In many areas, applications are real and important, and the arsenal of structures based on calixarenes provides tools effective in numerous areas of supramolecular chemistry. In this book, chapters contributed by a broad spectrum of international authors provide a variety of perspectives upon the progress and future of calixarene chemistry. Issues covered in depth include: Calixarene synthesis, with all its subtleties and sophistication. Forces at play in the inclusion of neutral and charged molecules by calixarenes. Theoretical analyses of calixarene properties. Dynamics and thermodynamics of calixarenes and their complexes. Nanocomposite construction based on calixarene aggregates. Calixarenes on surfaces. Analytical applications of calixarenes. Catalysis by calixarenes and their complexes. Resource recovery and waste treatment with calixarenes. New directions in calixarene chemistry. Hetero- and homo-calixarenes. Bioactive calixarenes. Coordination chemistry of calixarenes. Calixarenes in the solid state.

Download or read book Supramolecular Photochemistry written by V. Ramamurthy and published by John Wiley & Sons. This book was released on 2011-07-07 with total page 511 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is the most updated, comprehensive collection of monographs on all aspects of photochemistry and photophysics related to natural and synthetic, inorganic, organic, and biological supramolecular systems. Supramolecular Photochemistry: Controlling Photochemical Processes addresses reactions in crystals, organized assemblies, monolayers, zeolites, clays, silica, micelles, polymers, dendrimers, organic hosts, supramolecular structures, organic glass, proteins and DNA, and applications of photosystems in confined media. This landmark publication describes the past, present, and future of this growing interdisciplinary area.

Download or read book ACS Style Guide written by Anne M. Coghill and published by American Chemical Society. This book was released on 2006 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the time since the second edition of The ACS Style Guide was published, the rapid growth of electronic communication has dramatically changed the scientific, technical, and medical (STM) publication world. This dynamic mode of dissemination is enabling scientists, engineers, and medicalpractitioners all over the world to obtain and transmit information quickly and easily. An essential constant in this changing environment is the requirement that information remain accurate, clear, unambiguous, and ethically sound.This extensive revision of The ACS Style Guide thoroughly examines electronic tools now available to assist STM writers in preparing manuscripts and communicating with publishers. Valuable updates include discussions of markup languages, citation of electronic sources, online submission ofmanuscripts, and preparation of figures, tables, and structures. In keeping current with the changing environment, this edition also contains references to many resources on the internet.With this wealth of new information, The ACS Style Guide's Third Edition continues its long tradition of providing invaluable insight on ethics in scientific communication, the editorial process, copyright, conventions in chemistry, grammar, punctuation, spelling, and writing style for any STMauthor, reviewer, or editor. The Third Edition is the definitive source for all information needed to write, review, submit, and edit scholarly and scientific manuscripts.

Download or read book Humic Substances written by Robert L. Wershaw and published by CRC Press. This book was released on 2020-11-25 with total page 254 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is an introduction and guide to the use of nuclear magnetic resonance (NMR) spectroscopy for the study of humic materials and coals. It provides a general discussion of the application of liquid-state and solid-state NMR techniques.

Download or read book Polymer Characterisation written by B.J. Hunt and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 376 pages. Available in PDF, EPUB and Kindle. Book excerpt: Polymers continue to play an ever increasing role in the modern world. In fact it is quite inconceivable to most people that we could ever have existed of the increased volume and variety of materials without them. As a result currently available, and the diversity of their application, characterisation has become an essential requirement of industrial and academic laboratories in volved with polymeric materials. On the one hand requirements may come from polymer specialists involved in the design and synthesis of new materials who require a detailed understanding of the relationship between the precise molecular architecture and the properties of the polymer in order to improve its capabilities and range of applications. On the other hand, many analysts who are not polymer specialists are faced with the problems of analysing and testing a wide range of polymeric materials for quality control or material specification purposes. We hope this book will be a useful reference for all scientists and techno or industrial laboratories, logists involved with polymers, whether in academic and irrespective of their scientific discipline. We have attempted to include in one volume all of the most important techniques. Obviously it is not possible to do this in any great depth but we have encouraged the use of specific examples to illustrate the range of possibilities. In addition numerous references are given to more detailed texts on specific subjects, to direct the reader where appropriate. The book is divided into II chapters.

Download or read book The Nuclear Overhauser Effect written by Joseph H. Noggle and published by . This book was released on 1971 with total page 272 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Nuclear Overhauser Effect aims to provide a unified treatment of both the theory and applications of the NOE that would be accessible to the chemist who is not a specialist in NMR, but who would nevertheless like to use the NOE to solve problems in his own area of interest. Assuming only that the reader has a typical chemist's working knowledge of NMR, an attempt is made to present the results in each section in a sufficiently simple form so that little mathematical sophistication will be required to apply them with understanding. This book comprises eight chapters, and begins with a focus on nuclear spin-lattice relaxation. The following chapters then discuss mechanisms of spin-lattice relaxation; the nuclear overhauser effect in rigid molecules; the effects of internal motions; experimental methods; transient methods; the effects of chemical exchange; and applications of the nuclear overhauser effect, with a review of available literature. This book will be of interest to practitioners in the fields of chemistry and physics.

Download or read book NMR Crystallography written by Robin K. Harris and published by John Wiley & Sons. This book was released on 2009-12-21 with total page 523 pages. Available in PDF, EPUB and Kindle. Book excerpt: The content of this volume has been added to eMagRes (formerly Encyclopedia of Magnetic Resonance) - the ultimate online resource for NMR and MRI. The term "NMR Crystallography" has only recently come into common usage, and even now causes raised eyebrows within some parts of the diffraction community. The power of solid-state NMR to give crystallographic information has considerably increased since the CPMAS suite of techniques was introduced in 1976. In the first years of the 21st century, the ability of NMR to provide information to support and facilitate the analysis of single-crystal and powder diffraction patterns has become widely accepted. Indeed, NMR can now be used to refine diffraction results and, in favorable cases, to solve crystal structures with minimal (or even no) diffraction data. The increasing ability to relate chemical shifts (including the tensor components) to the crystallographic location of relevant atoms in the unit cell via computational methods has added significantly to the practice of NMR crystallography. Diffraction experts will increasingly welcome NMR as an allied technique in their structural analyses. Indeed, it may be that in the future crystal structures will be determined by simultaneously fitting diffraction patterns and NMR spectra. This Handbook is organised into six sections. The first contains an overview and some articles on fundamental NMR topics, followed by a section concentrating on chemical shifts, and one on coupling interactions. The fourth section contains articles describing how NMR results relate to fundamental crystallography concepts and to diffraction methods. The fifth section concerns specific aspects of structure, such as hydrogen bonding. Finally, four articles in the sixth section give applications of NMR crystallography to structural biology, organic & pharmaceutical chemistry, inorganic & materials chemistry, and geochemistry. About EMR Handbooks / eMagRes Handbooks The Encyclopedia of Magnetic Resonance (up to 2012) and eMagRes (from 2013 onward) publish 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 EMR Handbooks / eMagRes Handbooks on specific areas of NMR and MRI. The chapters of each of these handbooks will comprise a carefully chosen selection of articles from eMagRes. In consultation with the eMagRes Editorial Board, the EMR Handbooks / eMagRes Handbooks are coherently planned in advance by specially-selected Editors, and new articles are written (together with updates of some already existing articles) 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 View other eMagRes publications here