Read Books Online and Download eBooks, EPub, PDF, Mobi, Kindle, Text Full Free.
Nuclear Magnetic Resonance Studies Using Director Reorientation In Nematic Liquid Crystals
Download Nuclear Magnetic Resonance Studies Using Director Reorientation In Nematic Liquid Crystals full books in PDF, epub, and Kindle. Read online Nuclear Magnetic Resonance Studies Using Director Reorientation In Nematic Liquid Crystals ebook anywhere anytime directly on your device. Fast Download speed and no annoying ads. We cannot guarantee that every ebooks is available!
Book Synopsis Nuclear Magnetic Resonance Studies Using Director Reorientation in Nematic Liquid Crystals by : William A. Heeschen
Download or read book Nuclear Magnetic Resonance Studies Using Director Reorientation in Nematic Liquid Crystals written by William A. Heeschen and published by . This book was released on 1986 with total page 458 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Nuclear Magnetic Resonance of Liquid Crystals by : Ronald Y. Dong
Download or read book Nuclear Magnetic Resonance of Liquid Crystals written by Ronald Y. Dong and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 320 pages. Available in PDF, EPUB and Kindle. Book excerpt: Intended for researchers and students in physics, chemistry and materials science, this book provides the necessary background information and sufficient mathematical and physical detail to study the current research literature. The book begins with a survey of liquid crystal phases and field effects, together with an introduction to the basic physics of nuclear magnetic resonance. It then discusses orientational ordering and molecular field theories for various liquid crystal molecules and nmr studies of uniaxial and biaxial phases. Subsequent chapters consider spin relaxation processes and rotational, translational, and internal molecular dynamics of liquid crystals. The final chapter discusses two-dimensional and multiple- quantum nmr spectroscopies and their application in elucidating liquid crystal properties. This second edition, updated throughout, incorporates many new references and includes new mathematical appendices.
Book Synopsis Nuclear Magnetic Resonance Studies in Lyotropic Liquid Crystals by : CL Khetrapal
Download or read book Nuclear Magnetic Resonance Studies in Lyotropic Liquid Crystals written by CL Khetrapal and published by Springer Science & Business Media. This book was released on 2013-03-13 with total page 89 pages. Available in PDF, EPUB and Kindle. Book excerpt: 1. Lyotropic Liquid Crystals The class of compounds known as thermotropic liquid crystals has been widely utilized in basic research and industry during recent years. The properties of these materials are such that on heating from the solid to the isotropic liquid state, phase transitions occur with the formation of one or more intermediate anisotropic liquids. The unique and sometimes startling properties of these liquid crystals are the properties of pure compounds. However, there exists a second class of substances known as lyotropic liquid crystals which obtain their anisotropic properties from the mixing of two or more components. One of the components is amphiphilic, containing a polar head group (generally ionic or zwitterionic) attached to one or more long-chain hydrocarbons; the second component is usually water. Lyotropic liquid crystals occur abundantly in nature, particularly in all living systems. As a consequence, a bright future seems assured for studies on such systems. Even now, many of the properties of these systems are poorly understood. It is the purpose of this review to consolidate the results obtained from nuclear magnetic resonance studies of such systems and to provide a coherent picture of the field. Probably the most familiar example of a lyotropic liquid crystal is soap in water. A common soap is sodium dodecylsulphate where an ionic group (sulphate) is attached to a hydrocarbon chain containing twelve carbons.
Book Synopsis Nuclear Magnetic Resonance of Liquid Crystals by : J.W. Emsley
Download or read book Nuclear Magnetic Resonance of Liquid Crystals written by J.W. Emsley and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 580 pages. Available in PDF, EPUB and Kindle. Book excerpt: The liquid crystalline state has been known for about a century and has been studied by many techniques. Nuclear magnetic resonance has been used to study mesophases for thirty years, but it has been in very recent years that advances in this form of spectroscopy have led to a rapid growth in its applications to the study both of liquid crystals and of solutes dissolved in them. It has become apparent that no other method of studying liquid crystals can yield such a wealth of data and it is unrivalled as a means of probing the behaviour of the molecules in mesophases. There has also been a steady increase in the study of the shape of small molecules dissolved in liquid crystals via the analysis of their NMR spectrum. In fact, the study of solutes was until recently regarded as a separate activity to the study of liquid crystals themselves, but this artificial division arose only from the gap between the large amount of information that could be derived from the spectrum of a small molecule and the rather meagre data set obtainable from the spectra of liquid crystals. This gap has, however, narrowed and it is now possible to derive a very detailed picture of the structure and orientational ordering of the large molecules typical of those which form liquid crystals. There has also been a rapid growth of interest in the liquid crystalline state.
Book Synopsis Nuclear Magnetic Resonance Studies of Selected Dimethyl Compounds in a Nematic Liquid Crystal Solvent System by : Judith Grove Koch
Download or read book Nuclear Magnetic Resonance Studies of Selected Dimethyl Compounds in a Nematic Liquid Crystal Solvent System written by Judith Grove Koch and published by . This book was released on 1972 with total page 210 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Syntheses and Nuclear Magnetic Resonance Studies of Liquid Crystals by : Mei Sing Ho
Download or read book Syntheses and Nuclear Magnetic Resonance Studies of Liquid Crystals written by Mei Sing Ho and published by . This book was released on 1994 with total page 282 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Nuclear Magnetic Resonance Studies of Liquid Crystals by : C. P. Stockley
Download or read book Nuclear Magnetic Resonance Studies of Liquid Crystals written by C. P. Stockley and published by . This book was released on 1980 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Nuclear Magnetic Resonance by : G A Webb
Download or read book Nuclear Magnetic Resonance written by G A Webb and published by Royal Society of Chemistry. This book was released on 2007-10-31 with total page 587 pages. Available in PDF, EPUB and Kindle. Book excerpt: As a spectroscopic method, nuclear magnetic resonance (NMR) has seen spectacular growth, both as a technique and in its applications. Today's 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 coverage 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 Nucleic Acids; and NMR of Carbohydrates, Lipids and Membranes. For those wanting to become rapidly acquainted with specific areas of NMR, Nuclear Magnetic Resonance provides unrivalled scope of coverage. Seasoned practitioners of NMR will find this an invaluable 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 experts in their specialist fields, this series is designed to help the chemistry community keep current with the latest developments in their field. Each volume in the series is published either annually or biennially and is a superb reference point for researchers. www.rsc.org/spr
Book Synopsis NMR of Ordered Liquids by : E.E. Burnell
Download or read book NMR of Ordered Liquids written by E.E. Burnell and published by Springer Science & Business Media. This book was released on 2013-03-14 with total page 465 pages. Available in PDF, EPUB and Kindle. Book excerpt: NMR of Ordered Liquids gives a unique overview of the scope and limitations of the NMR of oriented liquids, based on contributions from acknowledged experts in the field. The book consists of four sections: -detailed general introduction which covers the basic principles and sophisticated experimental techniques; -wide variety of applications ranging from NMR studies of small atoms and molecules in anisotropic liquids to the utilization of residual dipolar couplings for structure determination of biological molecules; -summary of the sophisticated theoretical treatments, computer simulations, and phenomenological models for anisotropic intermolecular interactions that are widely used in the analysis of experimental results; -overview of the dynamical aspects and relaxation processes relevant for orientationally ordered molecules.
Book Synopsis NMR Studies of Liquid Crystals and Molecules Dissolved in Liquid Crystal Solvents by :
Download or read book NMR Studies of Liquid Crystals and Molecules Dissolved in Liquid Crystal Solvents written by and published by . This book was released on 1982 with total page 324 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis describes several studies in which nuclear magnetic resonance (nmr) spectroscopy has been used to probe the structure, orientation and dynamics of liquid crystal mesogens and molecules dissolved in liquid crystalline phases. In addition, a modern high field nmr spectrometer is described which has been used to perform such nmr studies. Chapter 1 introduces the quantum mechanical formalisms used throughout this thesis and briefly reviews the fundamentals of nuclear spin physics and pulsed nmr spectroscopy. First the density operator is described and a specific form for the canonical ensemble is derived. Then Clebsch-Gordon coefficients, Wigner rotation matrices, and irreducible tensor operators are reviewed. An expression for the equilibrium (Curie) magnetization is obtained and the linear response of a spin system to a strong pulsed r.f. irradiation is described. Finally, the spin interaction Hamiltonians relevant to this work are reviewed together with their truncated forms. Chapter 2 is a deuterium magnetic resonance study of two 'nom' liquid crystals which possess several low temperature mesomorphic phases. Specifically, deuterium quadrupolar echo spectroscopy is used to determine the orientation of the liquid crystal molecules in smectic phases, the changes in molecular orientation and motion that occur at smectic-smectic phase transitions, and the order of the phase transitions. For both compounds, the phase sequence is determined to be isotropic, nematic, smectic A, smectic C, smectic B{sub A}, smectic B{sub C}, and crystalline. The structure of the smectic A phase is found to be consistent with the well-known model of a two dimensional liquid in which molecules are rapidly rotating about their long axes and oriented at right angles to the plane of the layers. Molecules in the smectic C phase are found to have their long axes tilted with respect to the layer normal, and the tilt angle is temperature dependent, increasing from zero at the smectic A - smectic C transition and reaching a maximum at 9{sup o} at the smectic C - smectic B{sub A} transition. This finding contradicts the results of X-ray diffraction studies which indicate that the tilt angle is 18{sup o} and temperature independent. The smectic B{sub A} - smectic B{sub C} phase transition is observed for the first time, and is found to be first order, a result that contradicts the prediction of a mean theory by McMillian. Chapter 3 is a multiple quantum nmr study of n-hexane oriented in a nematic liquid crystal solvent. The basic three pulse multiple quantum experiment is discussed which enables the observation of transitions for which.
Book Synopsis Carbon-13 NMR Studies of Liquid Crystals by : Stuart Anthony Allison
Download or read book Carbon-13 NMR Studies of Liquid Crystals written by Stuart Anthony Allison and published by . This book was released on 1976 with total page 270 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Nuclear Magnetic Resonance Studies of Orientational Order in Lyotropic Liquid Crystals by : Vaz. Nuno A. P.
Download or read book Nuclear Magnetic Resonance Studies of Orientational Order in Lyotropic Liquid Crystals written by Vaz. Nuno A. P. and published by . This book was released on 1980 with total page 412 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Nuclear Magnetic Resonance of Liquid Crystals by : J. W. Emsley
Download or read book Nuclear Magnetic Resonance of Liquid Crystals written by J. W. Emsley and published by . This book was released on 1984-11-30 with total page 592 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Two-dimensional Nuclear Magnetic Resonance Studies of Molecular Structure in Liquids and Liquid Crystals by : Steven Paul Rucker
Download or read book Two-dimensional Nuclear Magnetic Resonance Studies of Molecular Structure in Liquids and Liquid Crystals written by Steven Paul Rucker and published by . This book was released on 1991 with total page 454 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Introductory Essays by : M. M. Pintar
Download or read book Introductory Essays written by M. M. Pintar and published by Springer Science & Business Media. This book was released on 2013-03-12 with total page 161 pages. Available in PDF, EPUB and Kindle. Book excerpt: This set of essays was given as lectures at the 4th Waterloo International Summer School on Nuclear Magnetic Resonance held in June 1975 at the University of Water loo. The school was sponsored by the National Research Council of Canada and by the Canadian Association of Physicists. These Contributions are introductory and were not intended to be review papers. For valuable help, I would like to thank R. S. Hallsworth, D. W. Nicoll, and R. T. Thompson. M.M.Pintar Table of Contents A Guide to Relaxation Theory. By A. G. Redfield .................... 1 Thermodynamics of Spin Systems in Solids. An Elementary Introduction. By J. Jeener. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 . . . . . . . . . . . . Coherent Averaging and Double Resonance in Solids. By J. S. Waugh. . . . . .. . 23 Macroscopic Dipole Coherence Phenomena. By. E. L. Hahn . . . . . . . . . .. . . 31 . Nuclear Spins and Non Resonant Electromagnetic Phenomena. By G. J. Bene. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . 45 . . . . . . . . . Nuclear Spin Relaxation in Molecular Hydrogen. By F. R. McCourt. . . . . . .. . 55 Longitudinal Nuclear Spin Relaxation Time Measurements in Molecular Gases. By R. L. Armstrong . . . . . . . . . . . . . . . . . . . . . . . . .. . . . 71 . . . . . . . Spin-Lattice Relaxation in Nematic Liquid Crystals Via the Modulation of the Intramolecular Dipolar Interactions by Order Fluctuations. By R. Blinc . . .. 97 NMR Studies of Molecular Tunnelling. By S. Clough . . . . . . . . . . . . .. . . . 113 . . Effect of Molecular Tunnelling on NMR Absorption and Relaxation in Solids. By M. M. Pintar . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . 125 . . . . . . . . . .
Book Synopsis NMR studies of surface induced ordering in polymer dispersed liquid crystals by : J. W. Doane
Download or read book NMR studies of surface induced ordering in polymer dispersed liquid crystals written by J. W. Doane and published by . This book was released on 1988 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt: NMR studies of nematic liquid crystals confined to micron and submicron-size cavities in a solid polymer are described. The high surface-to-volume ratio imposed by the cavities and the high density of cavities present in polymer dispersed liquid crystals (PDLCs) allow for NMR studies of unusual surface phenomena not possible before by this powerful experimental method. Unique measurements of surface anchoring energies and angles, and experiments on the surface layer transition predicted by theory are shown to be accessible by this technique. Nematic director configurations and modifications of the nematic-istropic transition induced by the confinement of a nematic liquid crystal to a small and highly curved cavity are studied. These basic studies are guided by applications of PDLCs in light shutters for displays and other electrooptic devices. When nematic liquid crystals are dispersed as submicron-sizer droplets in polymers, electrically switched light shutters with a wide range of applications extending beyond existing liquid crystal technology are possible. These applications include large-scale flexible displays that do not require polarizes and are simple and cost effective to fabricate. (MJM).
Book Synopsis Nuclear Magnetic Resonance Studies in Liquid Crystal Solvents by : Narayana Swamy Balakrishnan
Download or read book Nuclear Magnetic Resonance Studies in Liquid Crystal Solvents written by Narayana Swamy Balakrishnan and published by . This book was released on 1978 with total page 328 pages. Available in PDF, EPUB and Kindle. Book excerpt:
