Nmr Studies Of Liquids And Disordered Solids At High Pressure Pulsed And High Pressure Techniques PDF Download

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NMR Studies of Liquids and Disordered Solids at High Pressure. [Pulsed and High-pressure Techniques].

NMR Studies of Liquids and Disordered Solids at High Pressure. [Pulsed and High-pressure Techniques].
Author:
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Total Pages:
Release: 1978
Genre:
ISBN:

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Molecular reorientation and translation in molecular liquids was studied. A dominant premise in these studies was that, except in strongly hydrogen-bonded systems such as water, the dynamics of a liquid may be considered to be a series of impulsive collisions. Details of the behavior would be dominated by the shape and size of the molecules under constant packing conditions. The second area of effort was in the plastic crystalline solid phase of two globular molecules, adamantane and cyclohexane. The NMR technique was used in these studies to measure self-diffusion coefficients and spin-lattice relaxation times. The applicability of pulsed NMR techniques to the study of the kinetics of order--disorder phase transitions in solid adamantane was demonstrated.


High Pressure NMR

High Pressure NMR
Author: Jiri Jonas
Publisher: Springer Science & Business Media
Total Pages: 272
Release: 2012-12-06
Genre: Science
ISBN: 3642759262

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In recent years, there has been a major expansion of high pressure research providing unique information about systems of interest to a wide range of scientific disciplines. Since nuclear magnetic resonance has been applied to a wide spec trum of problems in chemistry, physics and biochemistry, it is not surprising to find that high pressure NMR techniques have also had many applications in these fields of science. Clearly, the high information content of NMR experiments combined with high pressure provides a powerful tool in modern chem istry. It is the aim of this monograph, in the series on NMR Basic Principles and Progress, to illustrate the wide range of prob lems which can be successfully studied by high pressure NMR. Indeed, the various contributions in this volume discuss studies of interest to physics, chemical physics, biochemistry, and chemical reaction kinetics. In many different ways, this monograph demonstrates the power of modern experimental and theoretical techniques to investigate very complex systems. The first contribution, by D. Brinkman, deals with NMR and NQR studies of superionic conductors and high-Tc supercon ductors at high pressure. Pressure effects on phase transitions, detection of new phases, and pressure effects on diffusion and spin-lattice relaxation, represent a few of the topics discussed in this contribution of particular interest to solid state physics.


Energy Research Abstracts

Energy Research Abstracts
Author:
Publisher:
Total Pages: 548
Release: 1990
Genre: Power resources
ISBN:

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High Pressure Carbon-13 NMR Studies of Dynamics in Disordered Systems

High Pressure Carbon-13 NMR Studies of Dynamics in Disordered Systems
Author: Philip John Grandinetti
Publisher:
Total Pages:
Release: 1989
Genre:
ISBN:

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The development of experimental high pressure high resolution $\sp1$H-decoupled $\sp{13}$C NMR spectroscopy is described. The design of an pulsed NMR spectrometer with increased sensitivity and versatility is presented and used in the design and development of a high pressure high resolution double-resonance NMR probe. This new technique is used in the study of two disordered systems under extreme conditions of pressure. The first system is 2-ethylhexylbenzoate, a model elastohydrodynamic lubricant. The second system is L-$\alpha$-dipalmitoyl phosphatidylcholine, a model biomembrane system. Also, the design of a data acquisition system specifically targeted at the study of dynamic processes is described along with a new technique conceived during the development of the data acquisition system that allows a direct determination of the magnetic field gradient used in NMR diffusion studies.