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Solid State Proton Nuclear Magnetic Resonance Studies Of Hydrogen Site Occupancies Electronic Structure Properties And Diffusion Behavior In Transition Metal Hydrides
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Book Synopsis Solid-state Proton Nuclear Magnetic Resonance Studies of Hydrogen Site Occupancies, Electronic Structure Properties, and Diffusion Behavior in Transition Metal Hydrides by : Robert Clark Bowman
Download or read book Solid-state Proton Nuclear Magnetic Resonance Studies of Hydrogen Site Occupancies, Electronic Structure Properties, and Diffusion Behavior in Transition Metal Hydrides written by Robert Clark Bowman and published by . This book was released on 1983 with total page 504 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis SOLID-STATE PROTON NUCLEAR MAGNETIC RESONANCE STUDIES OF HYDROGEN SITE OCCUPANCIES, ELECTRONIC STRUCTURE PROPERTIES, AND DIFFUSION BEHAVIOR IN TRANSITIONMETAL. by : R. C. Bowman
Download or read book SOLID-STATE PROTON NUCLEAR MAGNETIC RESONANCE STUDIES OF HYDROGEN SITE OCCUPANCIES, ELECTRONIC STRUCTURE PROPERTIES, AND DIFFUSION BEHAVIOR IN TRANSITIONMETAL. written by R. C. Bowman and published by . This book was released on 1982 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Energy Research Abstracts written by and published by . This book was released on 1984 with total page 662 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Scientific and Technical Aerospace Reports by :
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1983 with total page 1252 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Solid State Proton Conductors by : Philippe Knauth
Download or read book Solid State Proton Conductors written by Philippe Knauth and published by John Wiley & Sons. This book was released on 2012-01-18 with total page 426 pages. Available in PDF, EPUB and Kindle. Book excerpt: Proton conduction can be found in many different solid materials, from organic polymers at room temperature to inorganic oxides at high temperature. Solid state proton conductors are of central interest for many technological innovations, including hydrogen and humidity sensors, membranes for water electrolyzers and, most importantly, for high-efficiency electrochemical energy conversion in fuel cells. Focusing on fundamentals and physico-chemical properties of solid state proton conductors, topics covered include: Morphology and Structure of Solid Acids Diffusion in Solid Proton Conductors by Nuclear Magnetic Resonance Spectroscopy Structure and Diffusivity by Quasielastic Neutron Scattering Broadband Dielectric Spectroscopy Mechanical and Dynamic Mechanical Analysis of Proton-Conducting Polymers Ab initio Modeling of Transport and Structure Perfluorinated Sulfonic Acids Proton-Conducting Aromatic Polymers Inorganic Solid Proton Conductors Uniquely combining both organic (polymeric) and inorganic proton conductors, Solid State Proton Conductors: Properties and Applications in Fuel Cells provides a complete treatment of research on proton-conducting materials.
Book Synopsis Electronic Structure and Properties of Hydrogen in Metals by : C.B. Satterthwaite
Download or read book Electronic Structure and Properties of Hydrogen in Metals written by C.B. Satterthwaite and published by Springer Science & Business Media. This book was released on 2013-03-09 with total page 682 pages. Available in PDF, EPUB and Kindle. Book excerpt: Hydrogen is the smallest impurity atom that can be implanted in a metallic host. Its small mass and strong interaction with the host electrons and nuclei are responsible for many anomalous and interesting solid state effects. In addition, hydrogen in metals gives rise to a number of technological problems such as hydrogen embrittlement, hydrogen storage, radiation hardening, first wall problems associated with nuclear fusion reactors, and degradation of the fuel cladding in fission reactors. Both the fundamental effects and applied problems have stimulated a great deal of inter est in the study of metal hydrogen systems in recent years. This is evident from a growing list of publications as well as several international conferences held in this field during the past decade. It is clear that a fundamental understanding of these problems re quires a firm knowledge of the basic interactions between hydrogen, host metal atoms, intrinsic lattice defects and electrons. This understanding is made particularly difficult by hyrogen's small mass and by the large lattice distortions that accompany the hydrogenation process. The purpose of the "International Symposium on the Electronic Structure and Properties of Hydrogen in Metals" held in Richmond, Virginia, March 4-6, 1982 was to increase our fundamental under standing of hydrogen in metals. Such knowledge is essential in solving technologically important questions. The symposium con sisted of twenty-two invited papers and seventy-two contributed poster presentations and attracted nearly 150 participants from thirteen countries. The proceedings of this symposium constitute this book.
Book Synopsis Comprehensive Dissertation Index by :
Download or read book Comprehensive Dissertation Index written by and published by . This book was released on 1989 with total page 712 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Dissertation Abstracts International by :
Download or read book Dissertation Abstracts International written by and published by . This book was released on 1983 with total page 500 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Government Reports Announcements & Index by :
Download or read book Government Reports Announcements & Index written by and published by . This book was released on 1983 with total page 722 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Government reports annual index by :
Download or read book Government reports annual index written by and published by . This book was released on 199? with total page 1370 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Nuclear Magnetic Resonance Study of the Role of Alloying on the Behavior of Hydrogen in Metals by : David Zamir
Download or read book Nuclear Magnetic Resonance Study of the Role of Alloying on the Behavior of Hydrogen in Metals written by David Zamir and published by . This book was released on 1975 with total page 86 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this study, nuclear magnetic resonance (NMR) measurements were carried out on the Ti-H system in order to contribute to an understanding of the electronic structure and physical properties of this transition metal hydride. The nuclear spin-lattice relaxation time of hydrogen in titanium hydride was measured as a function of temperature and hydrogen concentration in a temperature region where the primary relaxation mechanism is due to the conduction electrons. A phenomenological model of the electronic structure of the Ti-H system and the role of hydrogen was formulated in order to explain the data and to correlate physical properties of the metal hydride with the proposed model.
Download or read book INIS Atomindeks written by and published by . This book was released on 1988 with total page 960 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis American Doctoral Dissertations by :
Download or read book American Doctoral Dissertations written by and published by . This book was released on 1982 with total page 564 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Hydrogen in Metals: Basic properties by : G. Alefeld
Download or read book Hydrogen in Metals: Basic properties written by G. Alefeld and published by Springer. This book was released on 1978 with total page 452 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book ERDA Energy Research Abstracts written by and published by . This book was released on 1985 with total page 676 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Government Reports Annual Index: Keyword A-L by :
Download or read book Government Reports Annual Index: Keyword A-L written by and published by . This book was released on 1983 with total page 1092 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Nuclear Magnetic Resonance Study in Gaseous, Liquid and Solid State of the Hydrogen Mobility and the Hydrogen Metal Interaction in Transition Metal Complexes by : Jochen Matthes
Download or read book A Nuclear Magnetic Resonance Study in Gaseous, Liquid and Solid State of the Hydrogen Mobility and the Hydrogen Metal Interaction in Transition Metal Complexes written by Jochen Matthes and published by . This book was released on 2004 with total page 168 pages. Available in PDF, EPUB and Kindle. Book excerpt: (English) The present thesis is dedicated to the analysis of the mobility and interaction of dihydrogen with and on transition metal complexes by NMR spectroscopy at solid, at liquid, and at gaseous phase. Aspects of homogeneous catalysis could be transferred on heterogeneous catalysis. The topic has been divided into four independent chapters. In the first chapter investigations on exchange coupling of coordinated dihydrogen in the synthesised dihydrogen complexes were undertaken. The HH distance of the coordinated dihydrogen ligand in these complexes is compared to others in a "medium" range, they should thus display a medium rotational tunneling frequency in the range of MHz. Until now, methods for determining tunneling frequencies of that order are unknown. Here was the method succesfully applied for the determination of the tunnelling frequency in the benzoic acid dimer, the low temperature solid state field cycling NMR relaxational method, tested for usage in transition metal complexes. A direct mechanism of relaxation, could not be observed. By measurement of the temperature dependent spin lattice relaxation times (T1) a trend with the HH distance in the complexes could be detected. While the two complexes with the same HH distance (1 and 2) show the same relaxation behaviour at low temperatures, complex 3, in which dHH is significantly shorter, shows a strong, levelling off in the T1 curve. This is an indication for a higher tunnelling frequency expected for shorter HH distances in complex 3. In chapter 2 the synthesised deuterated ruthenium complexes were measured by solid state 2H und 31P MAS NMR spectroscopy. With the help of lineshape analysis of the spectra, the quadrupolar interactions could be determined. Surprisingly in the sample of 5, two complexes and free deuterium with a chemical shift of 1.1 ppm instead of 4.5 ppm were found. The 16e- complex 5 reacts with free deuterium to the labile, saturated 18e- complex. The main part of the thesis deals with the phenomenon of the transition metal catalysed ortho para hydrogen conversion. Some transition metal complexes are known to catalyse the ortho/para hydrogen conversion, hydrogen isotope scrambling and hydrogenation reactions in liquid solution. Using the example of Vaska's complex IrClCO(PPh3)2, we show by NMR spectroscopy that the solvent is not necessary for these reactions to occur. Thus, solid frozen solutions or polycrystalline powdered samples of homogeneous catalysts may become heterogeneous catalysts. Comparative liquid and solid state studies provide novel insight into the reaction mechanisms. The last and forth part of the thesis focusses on the C-H activation in orthometallated ruthenium complexes. The synthesis of a rare example of a cis hydride ethene complex and its crystal structure are presented. The existence of this complex contrasts with the well functioning Murai catalysis, in which C-C coupling is achieved by reaction of orthometallated complexes with unsaturated hydrocarbons. With the help of theoretical calculations performed by Eric Clot (University of Montpellier, France) the unreactivity of this complex is explained. (german) Die Doktorarbeit widmet sich der Aufklärung von der Mobilität und der Wechselwirkung von Wasserstoffmolekülen in und an Übergangsmetall Komplexen mit Hilfe der NMR Spektroskopie in der Gasphase, flüssiger und in fester Phase. Die für die homogene Katalyse geltenden Aspekte konnten auf die heterogene Katalyse übertragen werden. Das Thema wird in vier unterschiedlichen Problemkomplexen bearbeitet. In dem erste Problemkomplex wird das Rotationstunneln in den synthetisierten Diwasserstoff Komplexen untersucht. Diese Komplexe, deren koordinierte, undissoziierte Wasserstoffmoleküle einen verglichen mit anderen Komplexen mittleren HH Abstand aufweisen, sollten eine mittlere Rotationstunnelaufspaltung im Bereich von MHz haben. Für diese Größenordung war bisher keine Bestimmungsmethode be
