Download or read book Silica supported Vanadium Complexes written by Ziyad Ahmed Taha and published by . This book was released on 2004 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Structure and Reactivity of Silica supported Vanadium and Vanadium titanium Single site Catalysts written by and published by . This book was released on 1999 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book An XAS Investigation of the Structure of Silica supported Titanium Vanadium and Gallium Complexes written by Eric Walter Deguns and published by . This book was released on 2006 with total page 476 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis is divided into 3 main sections. The first section examines the structure of the surface sites formed in the reaction of VOCl3 with the surface of Aerosil and Sylopol silicas. Each silica was dehydroxylated at two different temperatures. Vanadium K-edge XANES and EXAFS reveals that the sites have a uniform first coordination sphere regardless of the hydroxyl content. EXAFS curve-fitting confirmed that the sites are & equiv;SiOVOCl 2, but revealed an unexpected asymmetry in the V-Cl bond distances, which is suggested to be a manifestation of silicon-chloride interactions. The analogous reaction was performed with VO(OiPr)3 affording & equiv;SiOVO(OiPr)2. The EXAFS suggested a similar asymmetry of 2-propoxy ligands.
Download or read book Synthesis and Characterization of Atomically Dispersed Vanadosilicate Catalysts in SiO20 based Building Block Solids written by and published by . This book was released on 2007 with total page 338 pages. Available in PDF, EPUB and Kindle. Book excerpt: Silica supported vanadium complexes have attracted interest as catalysts for a variety of catalytic reactions in the past two decades. Although many strategies have been developed for incorporating vanadyl species on silica surfaces, controlling dispersion and loading while simultaneously producing single site catalysts remains a challenging goal in this context and in catalysis as well. A simple strategy for producing single-site and site-isolated vanadyl species has been explored which allows for control of both the connectivity to the support as well as the local surface structure around a V=O group. The main elements of this strategy involve construction of the support from silicate building blocks linked by groups that both hold the matrix together and act as catalytically active sites. Controlled sequential dosing lead to catalysts in which control of the identity of the sites, their connectivity to the support and dispersion is maintained. The specific system that will be described involves the controlled reaction of vanadyl chloride (VOCl3) and vanadium tetrachloride (VCl4) with the tin functionallized spherosilicate cube, (SnMe3)SiO20. Labeled 17O (SnMe3*O)8Si8O12 and (Cl3Si)8Si8O20 molecule have also been synthesized successfully by using totally new synthetic methodologies. The physico-chemical properties of these vanadium catalysts were characterized by solid state 51V and 17O NMR, gravimetric analysis, EXAFS, and atomic absorption spectroscopy. A quick survey of isopropanol dehydration and dehydrogenation with these vanadium (IV and V) catalysts has been studies. The acid-base property of these single-site and site-isolated catalysts has been assessed by the conversion of isopropanol. Preliminary results of highly selectivity (>97%) of isopropanol conversion to propene will be described.
Download or read book Vanadium Catalysis written by Manas Sutradhar and published by Royal Society of Chemistry. This book was released on 2020-11-05 with total page 526 pages. Available in PDF, EPUB and Kindle. Book excerpt: Vanadium is one of the more abundant elements in the Earth’s crust and exhibits a wide range of oxidation states in its compounds making it potentially a more sustainable and more economical choice as a catalyst than the noble metals. A wide variety of reactions have been found to be catalysed by homogeneous, supported and heterogeneous vanadium complexes and the number of applications is growing fast. Bringing together the research on the catalytic uses of this element into one essential resource, including theoretical perspectives on proposed mechanisms for vanadium catalysis and an overview of its relevance in biological processes, this book is a useful reference for industrial and academic chemists alike.
Download or read book Modern Surface Organometallic Chemistry written by Jean-Marie Basset and published by John Wiley & Sons. This book was released on 2009-07-10 with total page 725 pages. Available in PDF, EPUB and Kindle. Book excerpt: Covering everything from the basics to recent applications, this monograph represents an advanced overview of the field. Edited by internationally acclaimed experts respected throughout the community, the book is clearly divided into sections on fundamental and applied surface organometallic chemistry. Backed by numerous examples from the recent literature, this is a key reference for all chemists.
Download or read book Surface and Interfacial Organometallic Chemistry and Catalysis written by C. Copéret and published by Springer Science & Business Media. This book was released on 2005-11-03 with total page 312 pages. Available in PDF, EPUB and Kindle. Book excerpt: With contributions by numerous experts
Download or read book Principles and Practice of Heterogeneous Catalysis written by John Meurig Thomas and published by John Wiley & Sons. This book was released on 2015-02-09 with total page 768 pages. Available in PDF, EPUB and Kindle. Book excerpt: This long-awaited second edition of the successful introduction to the fundamentals of heterogeneous catalysis is now completely revised and updated. Written by internationally acclaimed experts, this textbook includes fundamentals of adsorption, characterizing catalysts and their surfaces, the significance of pore structure and surface area, solid-state and surface chemistry, poisoning, promotion, deactivation and selectivity of catalysts, as well as catalytic process engineering. A final section provides a number of examples and case histories. With its color and numerous graphics plus references to help readers to easily find further reading, this is a pivotal work for an understanding of the principles involved.
Download or read book Handbook of Transition Metal Polymerization Catalysts written by Ray Hoff and published by John Wiley & Sons. This book was released on 2018-04-20 with total page 895 pages. Available in PDF, EPUB and Kindle. Book excerpt: Including recent advances and historically important catalysts, this book overviews methods for developing and applying polymerization catalysts – dealing with polymerization catalysts that afford commercially acceptable high yields of polymer with respect to catalyst mass or productivity. • Contains the valuable data needed to reproduce syntheses or use the catalyst for new applications • Offers a guide to the design and synthesis of catalysts, and their applications in synthesis of polymers • Includes the information essential for choosing the appropriate reactions to maximize yield of polymer synthesized • Presents new chapters on vanadium catalysts, Ziegler catalysts, laboratory homopolymerization, and copolymerization
Download or read book Comprehensive Coordination Chemistry II written by J. A. McCleverty and published by Newnes. This book was released on 2003-12-03 with total page 11845 pages. Available in PDF, EPUB and Kindle. Book excerpt: Comprehensive Coordination Chemistry II (CCC II) is the sequel to what has become a classic in the field, Comprehensive Coordination Chemistry, published in 1987. CCC II builds on the first and surveys new developments authoritatively in over 200 newly comissioned chapters, with an emphasis on current trends in biology, materials science and other areas of contemporary scientific interest.
Download or read book Surface Organometallic Chemistry Molecular Approaches to Surface Catalysis written by Jean-Marie Basset and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 340 pages. Available in PDF, EPUB and Kindle. Book excerpt: Surface organometallic chemistry is a new field bringing together researchers from organometallic, inorganic, and surface chemistry and catalysis. Topics ranging from reaction mechanisms to catalyst preparation are considered from a molecular basis, according to which the "active site" on a catalyst surface has a supra-molecular character. This. the first book on the subject, is the outcome of a NATO Workshop held in Le Rouret. France, in May. 1986. It is our hope that the following chapters and the concluding summary of recommendations for research may help to provide a definition of surface organometallic chemistry. Besides catalysis. the central theme of the Workshop, four main topics are considered: 1) Reactions of organometallics with surfaces of metal oxides, metals. and zeolites; 2) Molecular models of surfaces, metal oxides, and metals; 3) Molecular approaches to the mechanisms of surface reactions; 4) Synthesis and modification of zeolites and related microporous solids. Most surface organometallic chemistry has been carried out on amorphous high-surf ace-area metal oxides such as silica. alumina. magnesia, and titania. The first chapter. contributed by KNOZINGER. gives a short summary of the structure and reactivity of metal oxide surfaces. Most of our understanding of these surfaces is based on acid base and redox chemistry; this chemistry has developed from X-ray and spectroscopic data, and much has been inferred from the structures and reactivities of adsorbed organic probe molecules. There are major opportunities for extending this understanding by use of well-defined (single crystal) oxide surfaces and organometallic probe molecules.
Download or read book Fundamentals of Asymmetric Catalysis written by Patrick J. Walsh and published by University Science Books. This book was released on 2009-01-02 with total page 692 pages. Available in PDF, EPUB and Kindle. Book excerpt: This work describes the essential aspects of enantioselective catalysis, with chapters organised by concept rather than by reaction type. Each concept is supported by examples to give the reader broad exposure to a wide range of catalysts, reactions and reaction mechanisms.
Download or read book Heavy Metals Advances in Research and Application 2012 Edition written by and published by ScholarlyEditions. This book was released on 2012-12-26 with total page 1112 pages. Available in PDF, EPUB and Kindle. Book excerpt: Heavy Metals—Advances in Research and Application: 2012 Edition is a ScholarlyEditions™ eBook that delivers timely, authoritative, and comprehensive information about Heavy Metals. The editors have built Heavy Metals—Advances in Research and Application: 2012 Edition on the vast information databases of ScholarlyNews.™ You can expect the information about Heavy Metals in this eBook to be deeper than what you can access anywhere else, as well as consistently reliable, authoritative, informed, and relevant. The content of Heavy Metals—Advances in Research and Application: 2012 Edition has been produced by the world’s leading scientists, engineers, analysts, research institutions, and companies. All of the content is from peer-reviewed sources, and all of it is written, assembled, and edited by the editors at ScholarlyEditions™ and available exclusively from us. You now have a source you can cite with authority, confidence, and credibility. More information is available at http://www.ScholarlyEditions.com/.
Download or read book Vanadium in Soils and Plants written by Jörg Rinklebe and published by CRC Press. This book was released on 2022-08-17 with total page 259 pages. Available in PDF, EPUB and Kindle. Book excerpt: Vanadium is an essential element for humans and animals. The toxicity of vanadium at higher concentrations could be a global environmental concern and a significant issue for both environmental protection and economic benefits. The relevance of anthropogenic vanadium in the environment has increased significantly in recent years due to an increased demand for vanadium in high-temperature industrial activities. This book summarizes vanadium’s current research and explains its behavior and mobilization in the environment, especially in soils, sediments, water and plants. Through case studies from various countries, it discusses critical limits set and risk assessment approaches and remediation approaches of vanadium-contaminated soils. FEATURES Provides a comprehensive overview of vanadium in the total environment Covers the role of vanadium in various environments such as soils, sediments, water and plants Includes bioavailability studies and further case studies from various countries around the world Focuses on a better understanding of biogeochemical processes of vanadium Is written by international experts who present the current stage of the knowledge including innovative remediation and management approaches of vanadium-contaminated sites This book will be of use to upper-level undergraduate and graduate students taking courses in soil science, environmental science, soil ecology, water science, plant science, ecotoxicology, geology and geography as well as scientists, lecturers, environmental and technical engineers, ecologists, applied ecological scientists and managers.
Download or read book Vanadium Compounds Advances in Research and Application 2013 Edition written by and published by ScholarlyEditions. This book was released on 2013-06-21 with total page 95 pages. Available in PDF, EPUB and Kindle. Book excerpt: Vanadium Compounds—Advances in Research and Application: 2013 Edition is a ScholarlyBrief™ that delivers timely, authoritative, comprehensive, and specialized information about ZZZAdditional Research in a concise format. The editors have built Vanadium Compounds—Advances in Research and Application: 2013 Edition on the vast information databases of ScholarlyNews.™ You can expect the information about ZZZAdditional Research in this book to be deeper than what you can access anywhere else, as well as consistently reliable, authoritative, informed, and relevant. The content of Vanadium Compounds—Advances in Research and Application: 2013 Edition has been produced by the world’s leading scientists, engineers, analysts, research institutions, and companies. All of the content is from peer-reviewed sources, and all of it is written, assembled, and edited by the editors at ScholarlyEditions™ and available exclusively from us. You now have a source you can cite with authority, confidence, and credibility. More information is available at http://www.ScholarlyEditions.com/.
Download or read book Comprehensive Medicinal Chemistry II written by David J Triggle and published by Elsevier. This book was released on 2006-12-29 with total page 9367 pages. Available in PDF, EPUB and Kindle. Book excerpt: The first edition of Comprehensive Medicinal Chemistry was published in 1990 and was very well received. Comprehensive Medicinal Chemistry II is much more than a simple updating of the contents of the first edition. Completely revised and expanded, this new edition has been refocused to reflect the significant developments and changes over the past decade in genomics, proteomics, bioinformatics, combinatorial chemistry, high-throughput screening and pharmacology, and more. The content comprises the most up-to-date, authoritative and comprehensive reference text on contemporary medicinal chemistry and drug research, covering major therapeutic classes and targets, research strategy and organisation, high-throughput technologies, computer-assisted design, ADME and selected case histories. It is this coverage of the strategy, technologies, principles and applications of medicinal chemistry in a single work that will make Comprehensive Medicinal Chemistry II a unique work of reference and a single point of entry to the literature for pharmaceutical and biotechnology scientists of all disciplines and for many industry executives as well. Also available online via ScienceDirect (2006) - featuring extensive browsing, searching, and internal cross-referencing between articles in the work, plus dynamic linking to journal articles and abstract databases, making navigation flexible and easy. For more information, pricing options and availability visit www.info.sciencedirect.com. Comprehensively reviews - the strategies, technologies, principles and applications of modern medicinal chemistry Provides a global and current perspective of today's drug discovery process and discusses the major therapeutic classes and targets Includes a unique collection of case studies and personal assays reviewing the discovery and development of key drugs
Download or read book Application of Rhenium and Vanadium oxo Complexes as Catalysts in Organic Synthesis written by Alexander Thomas Radosevich and published by . This book was released on 2007 with total page 952 pages. Available in PDF, EPUB and Kindle. Book excerpt:
