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Author: Jeffrey Neal Rosenberg Publisher: ISBN: Category : Languages : en Pages : 31
Book Description
Metal oxo intermediates are evoked and observed in a wide range of natural and man-made catalytic system. These varied systems demonstrate divergent reactivity modes dependent on perturbations to the electronic structure and reaction conditions. It is necessary to uncover electronic structure characterization of reactive metal oxo intermediates to provide an improved means of understanding how perturbations to the electronic structure will direct towards these competing pathways. Herein, we have developed a platform for the study of site isolated metal oxo intermediates with a unique electronic structure derived from a conjugated linkage between graphitic carbon edge sites and a chelated metal center. This linkage results in a high degree of electronic coupling between the isolated metal site and the band structure of the graphitic carbon material, referred to as graphite-conjugated catalysts (GCCs). Specifically, we have synthesized a pyrazine-linked conjugated salen-type ligand platform which has been metallated with Mn2+ and used to functionalize graphitic carbon electrodes and powder. XPS surface characterization on the N and Mn chemical environments and relative abundance indicate the desired surface condensation to form a pyrazinic linkage has proceeded as desired. Electrochemical characterization of functionalized electrodes by cyclic voltammogram show three distinct features. Two reversible redox features consistent with proton-coupled electron transfers at the pyrizinic linkages and a third feature, putatively assigned to the metal site. Future work on this project will involve 1) the expansion of the scope of metallation to additional first row transition metals, 2) thermal reactivity studies, 3) in-situ XAS studies, and 4) electrochemical oxygen-reduction reactivity studies.
Author: Jeffrey Neal Rosenberg Publisher: ISBN: Category : Languages : en Pages : 31
Book Description
Metal oxo intermediates are evoked and observed in a wide range of natural and man-made catalytic system. These varied systems demonstrate divergent reactivity modes dependent on perturbations to the electronic structure and reaction conditions. It is necessary to uncover electronic structure characterization of reactive metal oxo intermediates to provide an improved means of understanding how perturbations to the electronic structure will direct towards these competing pathways. Herein, we have developed a platform for the study of site isolated metal oxo intermediates with a unique electronic structure derived from a conjugated linkage between graphitic carbon edge sites and a chelated metal center. This linkage results in a high degree of electronic coupling between the isolated metal site and the band structure of the graphitic carbon material, referred to as graphite-conjugated catalysts (GCCs). Specifically, we have synthesized a pyrazine-linked conjugated salen-type ligand platform which has been metallated with Mn2+ and used to functionalize graphitic carbon electrodes and powder. XPS surface characterization on the N and Mn chemical environments and relative abundance indicate the desired surface condensation to form a pyrazinic linkage has proceeded as desired. Electrochemical characterization of functionalized electrodes by cyclic voltammogram show three distinct features. Two reversible redox features consistent with proton-coupled electron transfers at the pyrizinic linkages and a third feature, putatively assigned to the metal site. Future work on this project will involve 1) the expansion of the scope of metallation to additional first row transition metals, 2) thermal reactivity studies, 3) in-situ XAS studies, and 4) electrochemical oxygen-reduction reactivity studies.
Author: Arthur Martell Publisher: Springer Science & Business Media ISBN: 1461309557 Category : Science Languages : en Pages : 341
Book Description
This monograph consists of manuscripts, summary statements, and poster abstracts submitted by invited speakers and poster contributors who participated in the symposium "Oxygen Complexes and Oxygen Activation by Transition Metals," held March 23-26, 1987, at Texas A&M University. This meeting was the fifth annual international symposium sponsored by the Texas A&M Industry-University Cooperative Chemistry Program (IUCCP). The co chairmen of the conference were Professors Arthur E. Martell and Donald T. Sawyer of the Texas A&M University Chemistry Department. The program was developed by an academic-industrial steering committee consisting of the co-chairmen and members appointed by the sponsoring chemical companies Dr. James F. Bradzil, The Standard Oil Company, Ohio; Dr. Jerry R. Ebner, Monsanto Company; Dr. Craig Murchison, Dow Chemical Company; Dr. Donald C. Olsen, Shell Development Company; Dr. Tim R. Ryan, Celanese Chemical Company; and Dr. Ron Sanderson, Texaco Chemical Company. The subject of this conference reflects the intense interest that has developed in academic institutions and industry on several aspects of dioxygen chemistry. These include the formation of dioxygen complexes and their applications in facilitated transport and oxygen separation; homo geneous and heterogeneous catalysis of oxidation; and oxygenation of organic substrates by molecular oxygen. The conference differs in two respects from several other symposia on dioxygen chemistry held during the past few years. First, there is extensive industrial participation, especially with respect to oxygen activation.
Author: D.H.R. Barton Publisher: Springer Science & Business Media ISBN: 1461530008 Category : Science Languages : en Pages : 503
Book Description
This monograph consists of the proceedings of the Fifth International Symposium on the Activation of Dioxygen and Homogeneous Catalytic Oxidation, held in College Station, Texas, March 14-19, 1993. It contains an introductory chapter authored by Professors D. H. R. Barton and D. T. Sawyer, and twenty-nine chapters describing presentations by the plenary lecturers and invited speakers. One of the invited speakers, who could not submit a manuscript for reasons beyond his control, is represented by an abstract of his lecture. Also included are abstracts of forty-seven posters contributed by participants in the symposium. Readers who may wish to know more about the subjects presented in abstract form are invited to communicate directly with the authors of the abstracts. This is the fifth international symposium that has been held on this subject. The first was hosted by the CNRS, May 21-29, 1979, in Bendor, France (on the Island of Bandol). The second meeting was organized as a NATO workshop in Padova, Italy, June 24-27, 1984. This was followed by a meeting in Tsukuba, Japan, July 12-16, 1987. The fourth symposium was held at Balatonfured, Hungary, September 10-14, 1990. The sixth meeting is scheduled to take place in Delft, The Netherlands (late Spring, 1996); the organizer and host will be Professor R. A. Sheldon.
Author: Jens Hagen Publisher: John Wiley & Sons ISBN: 3527331654 Category : Technology & Engineering Languages : en Pages : 546
Book Description
Now in it's 3rd Edition, Industrial Catalysis offers all relevant information on catalytic processes in industry, including many recent examples. Perfectly suited for self-study, it is the ideal companion for scientists who want to get into the field or refresh existing knowledge. The updated edition covers the full range of industrial aspects, from catalyst development and testing to process examples and catalyst recycling. The book is characterized by its practical relevance, expressed by a selection of over 40 examples of catalytic processes in industry. In addition, new chapters on catalytic processes with renewable materials and polymerization catalysis have been included. Existing chapters have been carefully revised and supported by new subchapters, for example, on metathesis reactions, refinery processes, petrochemistry and new reactor concepts. "I found the book accesible, readable and interesting - both as a refresher and as an introduction to new topics - and a convenient first reference on current industrial catalytic practise and processes." Excerpt from a book review for the second edition by P. C. H. Mitchell, Applied Organometallic Chemistry (2007)
Author: Alfredo Ricci Publisher: John Wiley & Sons ISBN: 3527347399 Category : Science Languages : en Pages : 480
Book Description
Discover a comprehensive overview of efficient synthetic routes to an important compound class in organic and pharmaceutical chemistry Methodologies in Amine Synthesis: Challenges and Applications delivers powerful and state-of-the-art methods for the efficient preparation of amines. The text summarizes recent advances in the electrophilic amination reaction, hydroamination, C-H amination and newly developed photocatalytic approaches. The distinguished editor has included resources that discuss organocatalytic and enzymatic routes to the generation of amines under mild and environmentally friendly conditions. The book also highlights the relevance of the amino function in bioactive molecules, drugs, and smart materials, as well as the palladium-catalyzed aromatic amination reaction. It presents efficient and practical synthetic methods, highlights the opportunities and challenges associated with each, and discusses their possible applications in pharmaceutical chemistry and materials science. Edited by the expert who wrote Modern Amination Methods and Amino Group Chemistry, the book includes a breadth and depth of material essential to the practice of academic and industrial chemists working in organic synthesis and catalysis. Readers will also benefit from the inclusion of: A thorough introduction to new openings and perspectives in the electrophilic amination Discussions of asymmetric catalysed hydroaminomethylation and amino organocatalysis A treatment of the synthetic application of transaminase or MAO biocatalysis to the synthesis of amines An exploration of recent developments in C-H amination, as well as photocatalytic approaches to the synthesis of amines An examination of primary amines from renewable bio-based resources Perfect for organic, natural product, catalytic, medicinal, and polymer chemists, Methodologies in Amine Synthesis: Challenges and Applications will also earn a place in the libraries of materials scientists and chemists working with organometallics who desire a one-stop reference edited by a well-known expert in the field.
Author: Marine Desage-El Murr Publisher: John Wiley & Sons ISBN: 3527348506 Category : Science Languages : en Pages : 373
Book Description
Redox-Active Ligands Authoritative resource showcasing a new family of ligands that can lead to better catalysts and promising applications in organic synthesis Redox-Active Ligands gives a comprehensive overview of the unique features of redox-active ligands, describing their structure and synthesis, the characterization of their coordination complexes, and important applications in homogeneous catalysis. The work reflects the diversity of the subject by including ongoing research spanning coordination chemistry, organometallic chemistry, bioinspired catalysis, proton and electron transfer, and the ability of such ligands to interact with early and late transition metals, lanthanides, and actinides. The book is divided into three parts, devoted to introduction and concepts, applications, and case studies. After the introduction on key concepts related to the field, and the different types of ligands and complexes in which ligand-centered redox activity is commonly observed, mechanistic and computational studies are described. The second part focuses on catalytic applications of redox-active complexes, including examples from radical transformations, coordination chemistry and organic synthesis. Finally, case studies of redox-active guanidine ligands, and of lanthanides and actinides are presented. Other specific sample topics covered include: An overview of the electronic features of redox-active ligands, covering their historical perspective and biological background The versatility and mode of action of redox-active ligands, which sets them apart from more classic and tunable ligands such as phosphines or N-heterocyclic carbenes Preparation and catalytic applications of complexes of stable N-aryl radicals Metal complexes with redox-active ligands in H+/e- transfer transformations By providing up-to-date information on important concepts and applications, Redox-Active Ligands is an essential reading for researchers working in organometallic and coordination chemistry, catalysis, organic synthesis, and (bio)inorganic chemistry, as well as newcomers to the field.
Author: Wolfgang Kaim Publisher: Royal Society of Chemistry ISBN: 0854045503 Category : Science Languages : en Pages : 247
Book Description
A practical guidebook illustrating the applications of spectroelectrochemistry to the understanding of redox reactions through identification of their intermediaries and products.
Author: Leonard R. MacGillivray Publisher: John Wiley & Sons ISBN: 111803516X Category : Science Languages : en Pages : 440
Book Description
Metal-organic frameworks represent a new class of materials that may solve the hydrogen storage problem associated with hydrogen-fueled vehicles. In this first definitive guide to metal-organic framework chemistry, author L. MacGillivray addresses state-of-art developments in this promising technology for alternative fuels. Providing professors, graduate and undergraduate students, structural chemists, physical chemists, and chemical engineers with a historical perspective, as well as the most up-to-date developments by leading experts, Metal-Organic Frameworks examines structure, symmetry, supramolecular chemistry, surface engineering, metal-organometallic frameworks, properties, and reactions.
Author: Jeffrey Neal Rosenberg
Author: Jeffrey Neal Rosenberg
Author: Arthur Martell
Author: 
Author: D.H.R. Barton
Author: Jens Hagen
Author: 
Author: Alfredo Ricci
Author: Marine Desage-El Murr
Author: Wolfgang Kaim
Author: Leonard R. MacGillivray