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Evaluation of the Toroid Cavity Detector for Electrophoretic NMR ; NMR Diffusion, Relaxation and Spectroscopic Studies of Monolayer Protected Water Soluble Gold Nanoclusters

2001 Electrochemistry
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Release : 2001
Genre : Electrochemistry
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Book Synopsis Evaluation of the Toroid Cavity Detector for Electrophoretic NMR ; NMR Diffusion, Relaxation and Spectroscopic Studies of Monolayer Protected Water Soluble Gold Nanoclusters by : Olaf Kohlmann

Download or read book Evaluation of the Toroid Cavity Detector for Electrophoretic NMR ; NMR Diffusion, Relaxation and Spectroscopic Studies of Monolayer Protected Water Soluble Gold Nanoclusters written by Olaf Kohlmann. This book was released on 2001. Available in PDF, EPUB and Kindle. Book excerpt:

Dissertation Abstracts International

2002 Dissertations, Academic
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Release : 2002
Genre : Dissertations, Academic
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Book Synopsis Dissertation Abstracts International by :

Download or read book Dissertation Abstracts International written by . This book was released on 2002. Available in PDF, EPUB and Kindle. Book excerpt:

Capillary Toroid Cavity Detector for High Pressure NMR.

2007
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Release : 2007
Genre :
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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
Genre :
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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.

Video Toroid Cavity Imager

2004
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Release : 2004
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Book Synopsis Video Toroid Cavity Imager by :

Download or read book Video Toroid Cavity Imager written by . This book was released on 2004. Available in PDF, EPUB and Kindle. Book excerpt: A video toroid cavity imager for in situ measurement of electrochemical properties of an electrolytic material sample includes a cylindrical toroid cavity resonator containing the sample and employs NMR and video imaging for providing high-resolution spectral and visual information of molecular characteristics of the sample on a real-time basis. A large magnetic field is applied to the sample under controlled temperature and pressure conditions to simultaneously provide NMR spectroscopy and video imaging capabilities for investigating electrochemical transformations of materials or the evolution of long-range molecular aggregation during cooling of hydrocarbon melts. The video toroid cavity imager includes a miniature commercial video camera with an adjustable lens, a modified compression coin cell imager with a fiat circular principal detector element, and a sample mounted on a transparent circular glass disk, and provides NMR information as well as a video image of a sample, such as a polymer film, with micrometer resolution.

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