10 results on '"METAL catalysts"'
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2. Sustainable Catalysis : With Non-endangered Metals, Part 2
- Author
-
Michael North and Michael North
- Subjects
- Metal catalysts, Catalysis
- Abstract
Catalysis is a fundamentally sustainable process which can be used to produce a wide range of chemicals and their intermediates. Focussing on those catalytic processes which offer the most sustainability, this two-part book explores recent developments in this field, as well as examining future challenges. Focussing on catalysis through non-endangered metals, chapters are dedicated to the most important sustainable metals in catalysis: titanium, iron and aluminium. Remaining chapters examine several other important metals. Green aspects of the various reactions are also discussed, such as atom economy and use of green solvents and other reaction conditions. Together with “Sustainable Catalysis: Without Metals or Other Endangered Elements”, these books examine the progress in sustainable catalysis in all areas of chemistry, and are an important reference for researchers working in catalysis and green chemistry.
- Published
- 2015
3. Sustainable Catalysis : With Non-endangered Metals, Part 1
- Author
-
Michael North and Michael North
- Subjects
- Catalysis, Metal catalysts
- Abstract
Catalysis is a fundamentally sustainable process which can be used to produce a wide range of chemicals and their intermediates. Focussing on those catalytic processes which offer the most sustainability, this two-part book explores recent developments in this field, as well as examining future challenges. Focussing on catalysis through non-endangered metals, chapters are dedicated to the most important sustainable metals in catalysis: titanium, iron and aluminium. Remaining chapters examine several other important metals. Green aspects of the various reactions are also discussed, such as atom economy and use of green solvents and other reaction conditions. Together with “Sustainable Catalysis: Without Metals or Other Endangered Elements”, these books examine the progress in sustainable catalysis in all areas of chemistry, and are an important reference for researchers working in catalysis and green chemistry.
- Published
- 2015
4. Transition Metal Catalysis in Aerobic Alcohol Oxidation
- Author
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Francesca Cardona, Camilla Parmeggiani, Francesca Cardona, and Camilla Parmeggiani
- Subjects
- Transition metals, Alcohols--Oxidation, Metal catalysts, Organic compounds--Synthesis
- Abstract
The oxidation of primary and secondary alcohols to the corresponding carbonyl compounds is of fundamental importance in organic synthesis, due to the wide use of these products as precursors and intermediates for many drugs, vitamins and fragrances. However, traditional oxidants are often toxic and release considerable amounts of by-products. As an alternative, oxygen is among the cheaper and less polluting stoichiometric oxidants, and the implementation of a transition metal-based catalyst in combination with oxygen represents an emerging alternative to the traditional procedures. This book aims to give an overview of the aerobic oxidation of alcohols catalyzed by transition metals, and covers the most important advances in the last fifteen years. Following an introductory chapter on homogeneous-, heterogeneous- and nano-catalysis, use of copper, ruthenium, palladium, gold, vanadium and iron are discussed in turn. The book concludes with a useful overview that includes representative experimental procedures. This book will provide a valuable reference to organic chemists and green chemists in academia and industry.
- Published
- 2015
5. Gold-Catalyzed Cycloisomerization Reactions Through Activation of Alkynes : New Developments and Mechanistic Studies
- Author
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Antoine Simonneau and Antoine Simonneau
- Subjects
- Gold, Metal catalysts
- Abstract
Antoine Simonneau's thesis highlights the development of new cycloisomerization reactions through the activation of alkynes with gold complexes. First Simonneau describes 1,6-enynes and their direct conversion into allenes through 1,5-hydride or ester migration processes. The author and his team used appropriate propargylic functional groups to achieve this conversion. This study shows that O-tethered 1,6-enynes carrying a strained cycloalkane at the propargylic position could undergo a cyclopropanation/ring expansion cascade reaction. The author employed this rearrangement as the starting point in the design of a new macro cycle synthesis. The next part of the thesis focuses on the cycloisomerization of diynes involving as the first step of the process the rearrangement of one alkyne partner into an allene thanks to a gold-catalyzed 1,3-shift of a propargylic ester. The thesis discloses a new cycloisomerization pattern featuring a 1,5-carbonyl transfer, giving rise to unprecedented cross-conjugated diketones. In the final part of the research, Simmoneau investigates the gold-catalyzed cycloisomerization mechanism of 1,6-enynes and questions the intermediacy of gold acetylides. By the means of NMR and mass spectrometry analysis, theoretical treatment and solution experiments, it was possible to rule out the involvement of these species in the catalytic cycle. This thesis has led to a number of publications in high-impact journals.
- Published
- 2014
6. Environmental Catalysis Over Gold-Based Materials
- Author
-
George Avgouropoulos, Tatyana Tabakova, George Avgouropoulos, and Tatyana Tabakova
- Subjects
- Metal catalysts, Environmental chemistry, Catalysis
- Abstract
This book presents the major developments in hydrogen-related catalytic and electrocatalytic reactions over gold-based materials over the last decade, including many of the advances made by academic and industrial researchers. Gold-based catalysts with potentially exciting new applications in hydrogen technology (e.g. purification of hydrogen, anode/cathode electrodes) are being investigated at a much higher rate than even before. A variety of techniques to synthesize, characterize and evaluate these materials is being employed. The book will be of interest to all those working in catalysis/green chemistry, in particular, to advanced level researchers in catalysis using gold-based materials. It is hoped that specialists in one reaction will read with interest the chapters on the neighbouring expertise. The book is also meant for PhD-students and advanced students interested in this area.
- Published
- 2013
7. Supported Metals In Catalysis (2nd Edition)
- Author
-
James Arthur Anderson, Marcos Fernandez Garcia, James Arthur Anderson, and Marcos Fernandez Garcia
- Subjects
- Heterogeneous catalysis, Metal catalysts
- Abstract
With contributions from experts in supported metal catalysis from both the industry and academia, this book presents the latest developments in characterization and application of supported metals in heterogeneous catalysis. In addition to thorough and updated coverage of the traditional aspects of heterogeneous catalysis such as preparation, characterization and use in well-established technologies such as vehicle emission control, the book also includes emerging areas where supported metal catalysis will make significant contributions to future developments, such as fuel cells and fine chemicals synthesis.The second edition of Supported Metals in Catalysis comes complete with new and updated chapters containing important summaries of research in a rapidly evolving field. Very few other books deal with this highly pertinent subject matter and, as such, it is a must-have for anyone working in the field of heterogeneous catalysis.
- Published
- 2012
8. Homogeneous Catalysis with Metal Complexes : Fundamentals and Applications
- Author
-
Gheorghe Duca and Gheorghe Duca
- Subjects
- Metal catalysts, Catalysis
- Abstract
The book about homogeneous catalysis with metal complexes deals with the description of the reductive-oxidative, metal complexes in a liquid phase (in polar solvents, mainly in water, and less in nonpolar solvents). The exceptional importance of the redox processes in chemical systems, in the reactions occuring in living organisms, the environmental processes, atmosphere, water, soil, and in industrial technologies (especially in food-processing industries) is discussed. The detailed practical aspects of the established regularities are explained for solving the specific practical tasks in various fields of industrial chemistry, biochemistry, medicine, analytical chemistry and ecological chemistry. The main scope of the book is the survey and systematization of the latest advances in homogeneous catalysis with metal complexes. It gives an overview of the research results and practical experience accumulated by the author during the last decade.
- Published
- 2012
9. Heterogeneous Enantioselective Hydrogenation : Theory and Practice
- Author
-
Evgenii Klabunovskii, Gerard V. Smith, Ágnes Zsigmond, Evgenii Klabunovskii, Gerard V. Smith, and Ágnes Zsigmond
- Subjects
- Metal catalysts, Organic compounds--Synthesis, Hydrogenation, Catalysis
- Abstract
Heterogeneous Enantioselective Hydrogenation: Theory and Practice reviews the development of enantioselective hydrogenation reaction catalysts. It looks at the first relatively ineffective catalysts right through to modern highly effective enantioselective catalytic systems, comparable in their efficiency to chiral metal complexes and enzymatic systems. The book begins with a summary of the first work on heterogeneous metal catalysts, which showed only the principal possibilities of enantioselective reactions. It then elaborates on metal catalysts which have enantioselectivities close to 100%. Finally, the practical utilization of chiral catalytic systems in processes of hydrogenation is described. The alpha- and beta-hydroxy carboxylic acid esters produced are precursors for manufacturing many synthones used for medicines as well as for monomers used for biodegradable polyesters, both of which have important practical applications. The volume summarizes more than 800 scientific papers in the field of enantioselective catalytic hydrogenation reactions, mainly those using heterogeneous metal catalysts. It provides detailed explanations of special techniques for the preparation of effective dissymmetric catalysts which provide highly efficient catalytic systems.
- Published
- 2006
10. Catalysis By Gold
- Author
-
Geoffrey C Bond, Catherine Louis, David Thompson, Geoffrey C Bond, Catherine Louis, and David Thompson
- Subjects
- Metal catalysts, Catalysis, Gold
- Abstract
Gold has traditionally been regarded as inactive as a catalytic metal. However, the advent of nanoparticulate gold on high surface area oxide supports has demonstrated its high catalytic activity in many chemical reactions. Gold is active as a heterogeneous catalyst in both gas and liquid phases, and complexes catalyse reactions homogeneously in solution. Many of the reactions being studied will lead to new application areas for catalysis by gold in pollution control, chemical processing, sensors and fuel cell technology. This book describes the properties of gold, the methods for preparing gold catalysts and ways to characterise and use them effectively in reactions. The reaction mechanisms and reasons for the high activities are discussed and the applications for gold catalysis considered.
- Published
- 2006
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