A Solid State Deuterium Nuclear Magnetic Resonance Study Of Molecular Motion In Urea N Alkane Inclusion Compounds
Download A Solid State Deuterium Nuclear Magnetic Resonance Study Of Molecular Motion In Urea N Alkane Inclusion Compounds full books in PDF, epub, and Kindle. Read online free A Solid State Deuterium Nuclear Magnetic Resonance Study Of Molecular Motion In Urea N Alkane Inclusion Compounds ebook anywhere anytime directly on your device. Fast Download speed and no annoying ads. We cannot guarantee that every ebooks is available!
Encyclopedia of Supramolecular Chemistry
| Author | : J. L. Atwood |
| Publisher | : CRC Press |
| Total Pages | : 1002 |
| Release | : 2004 |
| Genre | : Science |
| ISBN | : 9780824747244 |
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.
Encyclopedia of Supramolecular Chemistry - Two-Volume Set (Print)
| Author | : Jerry L. Atwood |
| Publisher | : CRC Press |
| Total Pages | : 1745 |
| Release | : 2013-10-09 |
| Genre | : Science |
| ISBN | : 1482258161 |
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.
Faculties, Publications, and Doctoral Theses in Chemistry and Chemical Engineering at United States Universities
| Author | : American Chemical Society. Committee on Professional Training |
| Publisher | : |
| Total Pages | : 1646 |
| Release | : 1991 |
| Genre | : Chemical engineering |
| ISBN | : |
Solid-State NMR Studies of the Guest Molecules in Urea Inclusion Compounds
| Author | : Xiaorong Yang |
| Publisher | : |
| Total Pages | : 189 |
| Release | : 2007 |
| Genre | : |
| ISBN | : 9783832515331 |
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.
The Multinuclear Approach to NMR Spectroscopy
| Author | : J.B. Lambert |
| Publisher | : Springer Science & Business Media |
| Total Pages | : 552 |
| Release | : 2012-12-06 |
| Genre | : Mathematics |
| ISBN | : 9400971303 |
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.
March's Advanced Organic Chemistry
| Author | : Michael B. Smith |
| Publisher | : John Wiley & Sons |
| Total Pages | : 2379 |
| Release | : 2007-01-29 |
| Genre | : Science |
| ISBN | : 0470084944 |
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
ACS Style Guide
| Author | : Anne M. Coghill |
| Publisher | : American Chemical Society |
| Total Pages | : 0 |
| Release | : 2006 |
| Genre | : Authorship |
| ISBN | : 9780841239494 |
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.
