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Capillary Toroid Cavity Detector for High Pressure NMR.

2007
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Release : 2007
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Book Synopsis Capillary Toroid Cavity Detector for High Pressure NMR. by :

Download or read book Capillary Toroid Cavity Detector for High Pressure NMR. written by . This book was released on 2007. Available in PDF, EPUB and Kindle. Book excerpt: A Toroid Cavity Detector (TCD) is provided for implementing nuclear magnetic resonance (NMR) studies of chemical reactions under conditions of high pressures and temperatures. A toroid cavity contains an elongated central conductor extending within the toroid cavity. The toroid cavity and central conductor generate an RF magnetic field for NMR analysis. A flow-through capillary sample container is located within the toroid cavity adjacent to the central conductor to subject a sample material flowing through the capillary to a static magnetic field and to enable NMR spectra to be recorded of the material in the capillary under a temperature and high pressure environment.

Toroid Cavities as NMR Detectors in High Pressure Probes

1993
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Release : 1993
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Book Synopsis Toroid Cavities as NMR Detectors in High Pressure Probes by :

Download or read book Toroid Cavities as NMR Detectors in High Pressure Probes written by . This book was released on 1993. Available in PDF, EPUB and Kindle. Book excerpt: A cylindrical toroid cavity has been developed for application as an NMR detector for high sensitivity and high resolution spectroscopy in metal vessel probes. Those probes are used for in situ investigations at high temperature and pressure. Since the transmitted r.f. field is completely confined within the torus, the cavity can be placed inside the pressurized system without magnetic coupling to the metal vessel. Resonance frequencies up to 400 MHz make the toroid cavity detector especially suited for use in 1H and 19F spectroscopy. Typically achieved static 1H linewidths, measured on CHCl3 using cavities in Be-Cu pressure vessels, are 2.0 Hz. On the basis of theoretical considerations that include the radial dependence of the r.f. field within cylindrical or circular toroid detectors, equations were evolved to predict the signal intensity as a function of the pulse width. The equations precisely describe the deviations from the sinusoidal approximation, which is generally used for signal intensities derived from Helmholtz or solenoid coils.

Mechanisms in Homogeneous Catalysis

2005-05-06 Science
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Release : 2005-05-06
Genre : Science
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Book Synopsis Mechanisms in Homogeneous Catalysis by : Brian Heaton

Download or read book Mechanisms in Homogeneous Catalysis written by Brian Heaton. This book was released on 2005-05-06. Available in PDF, EPUB and Kindle. Book excerpt: While chemists using spectroscopic methods need to learn from the specialists, they do not normally read the spectroscopists' original papers. This book provides this very information -- summarizing some recent advances in the mechanistic understanding of metallocene polymerization catalysts and the role of NMR spectroscopy in these endeavors. Adopting a real practice-oriented approach, the authors focus on two of the most important spectroscopic techniques with two parts devoted to each of NMR and IR spectroscopy - as well as on important industrial applications with regard to the reaction discussed. Rather than providing a complete and exhaustive review of homogeneous hydrogenation and its detailed mechanisms, the book focuses on the specific spectroscopic techniques and the mechanistic information that has been obtained from their application. The result is unique in its scope, allowing chemists from different fields to learn which techniques can be applied for their specific synthetic problems. The prizewinning editor, Professor Brian Heaton, is the key player in the field, and has brought together here a team of authors to cater for specialists, and researchers in industry and academia.

Energy Research Abstracts

1995 Power resources
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Release : 1995
Genre : Power resources
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Book Synopsis Energy Research Abstracts by :

Download or read book Energy Research Abstracts written by . This book was released on 1995. Available in PDF, EPUB and Kindle. Book excerpt:

Experimental Approaches of NMR Spectroscopy

2017-11-23 Science
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Release : 2017-11-23
Genre : Science
Kind : eBook
Book Rating : 667/5 ( reviews)

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Book Synopsis Experimental Approaches of NMR Spectroscopy by : The Nuclear Magnetic Resonance Society of Japan

Download or read book Experimental Approaches of NMR Spectroscopy written by The Nuclear Magnetic Resonance Society of Japan. This book was released on 2017-11-23. Available in PDF, EPUB and Kindle. Book excerpt: This book describes the advanced developments in methodology and applications of NMR spectroscopy to life science and materials science. Experts who are leaders in the development of new methods and applications of life and material sciences have contributed an exciting range of topics that cover recent advances in structural determination of biological and material molecules, dynamic aspects of biological and material molecules, and development of novel NMR techniques, including resolution and sensitivity enhancement. First, this book particularly emphasizes the experimental details for new researchers to use NMR spectroscopy and pick up the potentials of NMR spectroscopy. Second, the book is designed for those who are involved in either developing the technique or expanding the NMR application fields by applying them to specific samples. Third, the Nuclear Magnetic Resonance Society of Japan has organized this book not only for NMR members of Japan but also for readers worldwide who are interested in using NMR spectroscopy extensively.

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