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Showing 1 to 20 of 70 for “"Multinuclear"”.
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Multinuclear magnetic resonance studies of proteins
We have used a multinuclear approach to study proteins in the work described in this dissertation. We first studied fluorine labeled avian egg white lysozymes. Mutagenesis and other chemical modification methods were used to assign resonances from (4-F) Phe- and (4;F) Trp- hen egg white lysozyme. …
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Multinuclear NMR Investigations of Sol-Gel Systems
The inorganic polymeric materials known as oxide glasses are normally prepared by the fusion of refractory oxides, followed by rapid cooling to avoid devitrification. A topic of current interest in materials research is the preparation of oxide glasses by the hydrolysis and polymerization of metal …
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Multinuclear nuclear magnetic resonance investigations in organothallium chemistry.
Thallium-205 chemical shifts have been determined for organothallium(III) derivatives RTlx2 and R2TlX (R = alkyl alicyclic, alkenyl,aryl ; X = anion). … Twenty four new organothallium(III) derivatives have been synthesised and a number of existing syntheses modified.
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Chelated fluoroboron cations : synthesis and multinuclear nmr studies
… ligand, has been systematically studied by using multinuclear solution and solid state nuclear magnetic resonance spectroscopy and fast atom bombardment mass spectrometry. Three new methods of synthesis of (DD)BF2+ cations are reported, and compared with the previous method of reacting a chelating …
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Multinuclear NMR studies of zeolites and heme-proteins
The quadrupolar interaction having an electrostatic origin, reveals itself in a variety of ways in NMR spectroscopy. In solids, where motions are highly restricted, the quadrupolar interaction is anisotropic and orientation dependent. The static and time dependent parts of the quadrupolar …
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Multinuclear NMR Studies of Gallium Complexes in Aqueous Solution.
Gallium-67 tumor scanning is widely employed in the clinical detection and staging of a broad range of solid tumors and malignant lymphomas. As a basis for understanding the molecular mechanism of gallium localization in tumor cells, the aqueous chemistry of gallium(III) was investigated by nuclear …
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Multinuclear NMR Studies of Hemoproteins and Their Model Compounds
Nuclear magnetic resonance (NMR) in both solution and solid state has been used to study the active site structure of various hemoproteins, and the nature of the iron-oxygen bond in oxyhemoglobin. The first iron-57 NMR spectra of a metalloprotein, carbonmonoxymyoglobin, has been obtained, yielding …
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Multinuclear Solid-State Nuclear Magnetic Resonance Spectroscopy of Microporous Materials
… frameworks (MOFs) and titanosilicates, by multinuclear SSNMR spectroscopy in combination with quantum chemical calculations for computational modeling. Multinuclear SSNMR investigations of two prototypical MOFs with potential industrial applications, CPO-27-M (M = Mg, Zn, Co, Ni), and …
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Multinuclear and Mononuclear Polyploidy in the Drosophila Hindgut and Heart
… a new model to study tissue interconnectivity, multinuclearity, and the interaction between nuclear content and cytoplasm-sharing. I played a major role in the discovery that the adult Drosophila rectal papillae share cytoplasm and proteins up to at least 62 kDa. This sharing is developmentally …
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Multinuclear Nuclear Magnetic Resonance Studies of Model Inorganic Systems (Nmr)
A variety of techniques are employed to obtain information from molybdenum carbonyl on (gamma)-aluminum, the Group IIIA compounds, Al III and silica hydrolysis. Techniques such as rapid magic-angle sample spinning (MASS) of glass sealed samples are used to investigate the highly air sensitive …
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Multinuclear Solid-State NMR Studies of Supported Transition Metal Carbonyls
High field carbon-13 and oxygen-17 nuclear magnetic resonance (NMR) spectra have been obtained for a variety of transition metal carbonyl clusters, metal oxides, and oxide-supported metal carbonyl complexes. Magic-angle spinning (MAS) C-13 NMR spectra of polycrystalline metal carbonyl clusters …
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Multinuclear PGM complexes of thiosemicarbazones : synthesis, characterisation and biological activity
A series of mono- and dithiosemicarbazone ligands were prepared by simple Schiff-base condensation reactions between thiosemicarbazides and various substituted salicylaldehydes.
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Mono- and multinuclear PGM complexes containing thiosemicarbazones synthesis, characterization and antiplasmodial evaluation
… the synthesis of three series of mono- and multinuclear complexes, in which the thiosemicarbazone ligands chelate in either a bidentate (N,S) or tridentate (C,N,S) mode.
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The synthesis, characterization and activation of some multinuclear catalyst precursors for olefin polymerization
This thesis reports on an exploratory investigation into the immobilization of homogeneous olefin polymerisation cataiysts on dendritic supports...; The dendrimers . employed were essentially allylaryl-ether type systems and consisted of both dendritic wedges .and compltte dendrimers.. These …
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NOVEL ETHYLENE-BRIDGED HEXADENTATE BIS(AMIDINES), BIS(AMIDINATES), AND MULTINUCLEAR COINAGE METAL BIS(AMIDINE) COMPLEXES
… ng>L<sup>1–6</sup></strong>H<sub>2</sub>) and the multinuclear coinage metal complexes <strong>1</strong>–<strong>5</strong> of <strong>L<sup>4</sup></strong>H<sub>2</sub> were synthesized and characterized. The synthesis of<strong> L<sup>1–6</sup></strong>H<sub>2</sub> followed a 3-step protocol: …
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Multinuclear NMR studies on solution structures and dynamics of triosmium hydrido carbonyl phosphine cluster compounds
The reaction of ($\mu$-H)$\sb2$Os$\sb3$(CO)$\sb9$(PPh$\sb3$) with acetylene at room temperature provides two isomers of a hydridovinyl cluster. The solid-state structure of each isomer has been determined by single-crystal X-ray crystallography. The solution structures and dynamics have been …
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Synthesis, characterization and anticancer studies of multinuclear ruthenium(II) arene complexes based on a dendritic scaffold
A series of monodentate (N-) and chelating bidentate (N,N-, N,O-), monomeric and dendritic ligands based on a poly(propyleneimine) dendrimer scaffold were synthesized via Schiff base condensation reactions of the relevant amine and appropriate aldehydes. These reactions yielded air- and …
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Multinuclear NMR Investigations of Local Structure, Distortions and Redox Mechanisms in Layered Lithium Ion Battery Cathode Materials
Lithium ion (Li ion) battery technology has enabled a complete revolution in consumer electronics and is beginning to have a similar impact on transport. Increased adoption of electric vehicles is essential to reduce anthropogenic carbon emissions and combat climate change. For vehicular …
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