FESTKÖRPER NMR DISSERTATION

FESTKÖRPER NMR DISSERTATION

The spectroscopic technique we chose for the collection of structural-defining 13CC distances is the proton-driven spin diffusion PDSD recoupling method. Its presence furthermore decreases the catalytic activity in propylene self-metathesis reactions. In this work two examples in nanomaterials and interfacial chemistry are described where critical atomic level structural details, as well as information on dynamics, were obtained by the use of solid state NMR spectroscopy in conjunction with computational and related experimental approaches. Chapter 4 describes how we determined the labelling pattern of the two biosynthetically site-directed 13C-enriched samples, using several solution NMR experiments. Your Web browser is not enabled for JavaScript.

The chemisorption of CH3ReO3 on the surface of a dehydrated, amorphous silica-alumina generates a highly active catalyst for the metathesis of olefins, including functionalized olefins. Please verify that you are not a robot. Its presence furthermore decreases the catalytic activity in propylene self-metathesis reactions. A second, highly mobile CH3ReO3 species is primarily found at higher catalyst loadings, and was determined to be bound by hydrogen-bonding to surface silanols. Please re-enter recipient e-mail address es. Your Web browser is not enabled for JavaScript.

The first instance diasertation the question of the activation of a grafted organometallic rhenium complex by virtue of its interaction with a particular support, namely amorphous silica-alumina.

For this purpose, we have devised a methodology that allowed the measurement of multiple 13CC long-range distances by combining broad- band recoupling methods with dilution of 13C spins.

Hence, solid-state NMR has a strong potential to enable the structural investigation of several classes of biological systems, such as amyloid fibrils and membrane proteins, which are not easily accessible by the above-mentioned methods. Advanced Search Find a Library. Recent advances in chemical synthesis protocols have made certain coated In0.

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Structure determination of immobilized proteins by solid-state NMR spectroscopy

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festkörper nmr dissertation

In particular, shift differences provided insight into contacts between SH3 molecules in the micro-crystalline preparation used.

Don’t have an account? Preview this dissretation Preview this item. With the rapid rise in the importance of nanoscale materials, many standard structural characterization methods based on ordered structures have become much less useful, and need to be supplemented by innovative application of techniques such as NMR. Finding libraries that hold this item You may have already requested this item.

Structure determination of immobilized proteins by solid-state NMR spectroscopy. Remember me on this computer.

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These experiments provide a picture of the atomic and molecular distribution on the surface and the interior of the nanoparticle, and show that etching with HF results in significant reorganization of the InGaP nanoparticle surfaces and removal of surface defects. Journal for Facility Management.

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festkörper nmr dissertation

The initial step in determining a structure by NMR is the resonance assignment. Geowissenschaftliche Mitteilungen Recent notes on labor science and organization.

festkörper nmr dissertation

Structural studies by solid state NMR on the function of nanoscale materials: Home About Help Search. Synthesis of this catalytic system is accomplished by chemical vapor deposition onto the support. In the second part of this work the effect of rather different interfacial interactions are examined, namely those of structural changes following surface treatments on the optical properties of nanoscale Group III-V semiconductors and their ternary analogs.

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This leads to the 71Ga species being located in chemically and electronically more ordered molecular environments near the periphery of the nanoparticle, and hence improved photoluminescence. Some features of WorldCat will not be available. The E-mail Address es field is required. Please enter recipient e-mail address es.

Based on the 13C and 15N assignment, we arrived at an almost complete solid-state NMR assignment of proton signals by means of heteronuclear dipolar correlation spectroscopy, using indirect 1H featkörper. The unique virtue of solid- state NMR lies in its ability to study biomolecules without size restrictions and without the need of large well-ordered crystals.

A simple method was derived to extract distance information from build-up curves of cross-peak intensities in 15NN PDSD spectra. Privacy Policy Terms and Conditions. A second, highly mobile CH3ReO3 species is primarily found dossertation higher catalyst loadings, and was determined to be bound by hydrogen-bonding to surface silanols.

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