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Gaseous Vanadium, Vanadium Oxide and Hydroxide Clusters

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Author :
Release : 2008
Genre : Catalysis
Kind : eBook
Book Rating : 511/5 ( reviews)

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Book Synopsis Gaseous Vanadium, Vanadium Oxide and Hydroxide Clusters by : Sandra Feyel

Download or read book Gaseous Vanadium, Vanadium Oxide and Hydroxide Clusters written by Sandra Feyel. This book was released on 2008. Available in PDF, EPUB and Kindle. Book excerpt: The present work explores the reactivities of gaseous vanadium, vanadium-oxide, and oxovanadium-hydroxide clusters toward methanol and small hydrocarbons. Various means of mass-spectrometric techniques, isotopic labeling studies, infrared photodissociation spectroscopy, and complementary DFT-calculations are employed for this purpose. Additionally, the hydrogen-atom abstraction process from methane by polynuclear metal oxides is discussed. This work contributes to a better understanding of the metal-oxide cluster's catalytic activity on a molecular scale.

Computational Studies of the Structure of Vanadium Oxide Clusters and Their Reactions with Halocarbons

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Author :
Release : 2005
Genre :
Kind : eBook
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Book Synopsis Computational Studies of the Structure of Vanadium Oxide Clusters and Their Reactions with Halocarbons by : Yin Wei

Download or read book Computational Studies of the Structure of Vanadium Oxide Clusters and Their Reactions with Halocarbons written by Yin Wei. This book was released on 2005. Available in PDF, EPUB and Kindle. Book excerpt:

Spin States in Biochemistry and Inorganic Chemistry

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Release : 2015-09-22
Genre : Science
Kind : eBook
Book Rating : 281/5 ( reviews)

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Book Synopsis Spin States in Biochemistry and Inorganic Chemistry by : Marcel Swart

Download or read book Spin States in Biochemistry and Inorganic Chemistry written by Marcel Swart. This book was released on 2015-09-22. Available in PDF, EPUB and Kindle. Book excerpt: It has long been recognized that metal spin states play a central role in the reactivity of important biomolecules, in industrial catalysis and in spin crossover compounds. As the fields of inorganic chemistry and catalysis move towards the use of cheap, non-toxic first row transition metals, it is essential to understand the important role of spin states in influencing molecular structure, bonding and reactivity. Spin States in Biochemistry and Inorganic Chemistry provides a complete picture on the importance of spin states for reactivity in biochemistry and inorganic chemistry, presenting both theoretical and experimental perspectives. The successes and pitfalls of theoretical methods such as DFT, ligand-field theory and coupled cluster theory are discussed, and these methods are applied in studies throughout the book. Important spectroscopic techniques to determine spin states in transition metal complexes and proteins are explained, and the use of NMR for the analysis of spin densities is described. Topics covered include: DFT and ab initio wavefunction approaches to spin states Experimental techniques for determining spin states Molecular discovery in spin crossover Multiple spin state scenarios in organometallic reactivity and gas phase reactions Transition-metal complexes involving redox non-innocent ligands Polynuclear iron sulfur clusters Molecular magnetism NMR analysis of spin densities This book is a valuable reference for researchers working in bioinorganic and inorganic chemistry, computational chemistry, organometallic chemistry, catalysis, spin-crossover materials, materials science, biophysics and pharmaceutical chemistry.

Vanadium Oxide Anion Clusters

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Author :
Release : 2004
Genre : Surface active agents
Kind : eBook
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Book Synopsis Vanadium Oxide Anion Clusters by :

Download or read book Vanadium Oxide Anion Clusters written by . This book was released on 2004. Available in PDF, EPUB and Kindle. Book excerpt: Early transition metal oxide clusters have been a focus of study for several years. The production of vanadium oxide cluster anions in a pulsed helium flow reactor provides a relatively precise way of introducing defect sites and controlling the oxidation state of the vanadium atoms. The composition of the clusters can be changed from the V2O5 stoichiometry, where the vanadium atom is in a +5 oxidation state, to more reduced stoichiometries yielding a mixture of oxidation states containing atoms in the +2 oxidation state. The subsequent addition of reactant gases such as H2O and SO2 yields very intense adsorption reactions as well as a demonstration of the robustness of particular defect free clusters. For example, the cluster has been identified as a defect free cluster where all vanadium atoms are in the +5 oxidation state and all oxygen atoms are predicted to be in the 2- state. The cluster has been shown to not adsorb SO2- while clusters in a reduced oxidation state, such as and readily adsorb one or more SO2 molecules. The adsorption process has been shown to be size dependent, with the smallest monovanadium oxide anions being the most reactive.

Heats and Free Energies of Formation of Vanadium Nitride and Vanadium Carbide

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Author :
Release : 1963
Genre : Aluminates
Kind : eBook
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Book Synopsis Heats and Free Energies of Formation of Vanadium Nitride and Vanadium Carbide by : Albert J. Rambosek

Download or read book Heats and Free Energies of Formation of Vanadium Nitride and Vanadium Carbide written by Albert J. Rambosek. This book was released on 1963. Available in PDF, EPUB and Kindle. Book excerpt:

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