Download or read book Metal organic Framework Catalysts for Selective C H Borylation written by Jesse Brandon Duque and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Selective C-H functionalization of organic molecules is one of the most desired transformations in organic synthesis. In recent years, many groups have turned to using supramolecular chemistries to perturb native selectivity in reactions that are predominantly sterically controlled. In instances where there is little steric differentiation, people have turned to the development of supramolecular strategies that involve a level of directionality between substrate and catalyst assemblies primarily through non-covalent interactions. More proximal functionalizations to directing groups on substrates were the first to evolve, however branching out to more distal positions proved to be a formidable challenge. To address this discrepancy, significant research has been devoted to the use of porous materials as a potential support for use in transition metal catalysis to selectively functionalize a wide variety of compounds. One notable material type that has found itself in catalytic applications are metal-organic frameworks (MOFs). Because of their ability to be fitted with different types of metal and organic components, MOFs can contain a variety of functionalities for specific purposes integrated into them. The extended crystalline lattices and rigid framework of MOFs results in fixed spatial relationships between their structural features, and our main interest is exploiting these fixed relationships to selectively functionalize C-H bonds. In the short term, I sought to develop highly selective MOFs as effective C-H borylation catalysts. The long-term goal for my projects is to establish MOFs as tools for small molecule synthesis. The central hypothesis of this work is that the pore environment of MOFs can be modified to control selectivity in otherwise non or poorly selective transformations. To test this hypothesis, I investigated two different modes of perturbing selectivity in borylation reactions: selectivity through confinement and selectivity from substrate docking. In confinement-affected borylation, UiO-67-type MOFs were investigated for size confinement effects that assist in directing substrates into transition states where the ortho borylated regioisomer predominates. In the substrate docking approach, I investigated the use of MOF (Zn) PCN-222 as a metalloporphyrin-based director for substrate docking via Zn-substrate interactions. We were able to observe borylation activity using this MOF catalyst but did not observe significant regioselectivity in our experiments. In parallel with these studies, I developed a new approach toward high throughput experimentation in small molecule MOF catalysis, which allowed us to dispense submilligram quantities of MOF into multiple wells and lead to more efficient workflow using Chembeads technology developed by Abbvie and the team of Noah Tu.
Download or read book Advanced Catalysts Based on Metal organic Frameworks Part 1 written by Junkuo Gao and published by Bentham Science Publishers. This book was released on 2023-01-31 with total page 363 pages. Available in PDF, EPUB and Kindle. Book excerpt: Advanced Catalysts Based on Metal-organic Frameworks is a comprehensive introduction to advanced catalysts based on MOFs. It covers basic information about MOF catalysts with industrial and environmental applications. It updates readers on current applications and strategies to apply MOF-based catalysts in industrial processes geared for sustainability initiatives such as renewable energy, pollution control and combating carbon emission. Key Features - 13 structured, easy to read chapters that comprehensively cover MOF catalysts - An introduction to basic information about MOF catalysts - In-depth coverage of advanced applications of MOF catalysts - Explanation of MOF modifications and applications of derivative compounds - In-depth coverage of MOF catalysts used for electrocatalysis and photocatalysis - Detailed explanation of environmental-friendly and sustainable technologies (biomass upgrading, water purification, CO2 capture) - Updated references for advanced readers The is an essential reference for chemical engineers, scientists in the manufacturing and sustainability industry and post-graduate scholars working on MOFs and chemical catalysis.
Download or read book Metal Organic Frameworks MOFs as Catalysts written by Shikha Gulati and published by Springer Nature. This book was released on 2022-02-18 with total page 785 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book highlights the state-of-the-art research and discovery in the use of MOFs in catalysis, highlighting the scope to which these novel materials have been incorporated by the community. It provides an exceptional insight into the strategies for the synthesis and functionalization of MOFs, their use as CO2 and chemical warfare agents capture, their role in bio-catalysis and applications in photocatalysis, asymmetric catalysis, nano-catalysis, etc. This book will also emphasize the challenges with previous signs of progress and way for further research, details relating to the current pioneering technology, and future perspectives with a multidisciplinary approach. Furthermore, it presents up-to-date information on the economics, toxicity, and regulations related to these novel materials.
Download or read book Metal Organic Frameworks as Heterogeneous Catalysts written by Francesc X. Llabrés i Xamena and published by Royal Society of Chemistry. This book was released on 2013-07-01 with total page 446 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book examines the latest research and discovery in the use of MOFs in catalysis, highlighting the extent to which these materials have been embraced by the community.
Download or read book Metal Metal Oxides and Metal Organic Frameworks for Environmental Remediation written by Saravanan Rajendran and published by Springer Nature. This book was released on 2021-05-05 with total page 285 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book reviews principles, techniques and applications of metal, metal oxides, metal sulfides and metal-organic frameworks for removal and degradation of pollutants. Natural materials are often much more advanced than synthetic materials in terms of circularity and are functional, often biodegradable, recyclable and generate little waste. They are, therefore, a source of inspiration for new synthetic materials. In particular, recent research has focused on various types of functional materials such as organic, inorganic, nanostructured and composites for the remediation of environmental pollution.
Download or read book Metal Organic Frameworks for Chemical Reactions written by Anish Khan and published by Elsevier. This book was released on 2021-01-19 with total page 501 pages. Available in PDF, EPUB and Kindle. Book excerpt: Metal-Organic Frameworks for Chemical Reactions: From Organic Transformations to Energy Applications brings together the latest information on MOFs materials, covering recent technology in the field of manufacturing and design. The book covers different aspects of reactions from energy storage and catalysts, including preparation, design and characterization techniques of MOFs material and applications. This comprehensive resource is ideal for researchers and advanced students studying metal-organic frameworks in academia and industry. Metal-organic frameworks (MOFs) are nanoporous polymers made up of inorganic metal focuses connected by natural ligands. These entities have become a hot area of research because of their exceptional physical and chemical properties that make them useful in di?erent ?elds, including medicine, energy and the environment. Since combination conditions strongly a?ect the properties of these compounds, it is especially important to choose an appropriate synthetic technique that produces a product with homogenous morphology, small size dispersion, and high thermal stability. Covers the synthetic advantages and versatile applications of metal-organic frameworks (MOFs) due to their organic-inorganic hybrid nature and unique porous structure Includes energy applications such as batteries, fuel storage, fuel cells, hydrogen evaluation reactions and super capacitors Features information on using MOFs as a replacement to conventional engineering materials because they are lightweight, less costly, environmentally-friendly and sustainable
Download or read book Pincer Compounds written by David Morales-Morales and published by Elsevier. This book was released on 2018-04-11 with total page 756 pages. Available in PDF, EPUB and Kindle. Book excerpt: Pincer Compounds: Chemistry and Applications offers valuable state-of-the-art coverage highlighting highly active areas of research—from mechanistic work to synthesis and characterization. The book focuses on small molecule activation chemistry (particularly H2 and hydrogenation), earth abundant metals (such as Fe), actinides, carbene-pincers, chiral catalysis, and alternative solvent usage. The book covers the current state of the field, featuring chapters from renowned contributors, covering four continents and ranging from still-active pioneers to new names emerging as creative strong contributors to this fascinating and promising area. Over a decade since the publication of Morales-Morales and Jensen’s The Chemistry of Pincer Compounds (Elsevier 2007), research in this unique area has flourished, finding a plethora of applications in almost every single branch of chemistry—from their traditional application as very robust and active catalysts all the way to potential biological and pharmaceutical applications. Describes the chemistry and applications of this important class of organometallic and coordination compounds Includes contributions from global leaders in the field, featuring pioneers in the area as well as emerging experts conducting exciting research on pincer complexes Highlights areas of promising and active research, including small molecule activation, earth abundant metals, and actinide chemistry
Download or read book Remote C H Bond Functionalizations written by Debabrata Maiti and published by John Wiley & Sons. This book was released on 2021-04-26 with total page 450 pages. Available in PDF, EPUB and Kindle. Book excerpt: A guide to contemporary advancements in the field of distal C-H functionalizations An important and dynamic topic within the modern field of organic synthesis, selective functionalization of C-H bonds can be used in a variety of applications across the pharmaceutical and agrochemical industries. Remote C-H Bond Functionalizations presents an inclusive account of the most recent developments and potential applications of performing variegated functionalizations selectively at the distal positions of organic compounds. Featuring contributions by an international team of experts, this authoritative volume provides deep insight into distal functionalizations, including detailed discussion of mechanisms, the engineering of templates, and the design of strategies. The text covers a diverse range of topics including C-H functionalization of palladium/norbornene catalysis, ruthenium-catalyzed remote functionalization, the non-directed distal C(sp2)-H, functionalization, transition metal catalyzed distal para-selective C-H functionalization, and much more. Reviewing contemporary advancements in the field while laying the foundation for future research, this important resource: Provides the most recent research and thorough coverage of the subject available in a single volume Offers practical information on C-H functionalizations in various industries Includes an up-to-date introduction to distal C-H functionalizations Remote C-H Bond Functionalizations is a must-read for every synthetic chemist, including chemists working with organometallics, organic chemists and researchers, and industrial chemists.
Download or read book Enzyme inspired Metal organic Framework Materials for Supramolecular Catalysis written by Kanchana Prabodhani Samarakoon and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis describes to methods for generating multifunctional, enzyme-inspired metal-organic frameworks (MOF) catalysts: 1. Synthesis of a modifiable homochiral MOF material by incorporating a well-known solution phase catalyst 2. Use of a uniform post-synthetic modification strategy to introduce different chemical functionalities, one being a catalytic group. In Chapter 2, using an established mixed-linker pillared MOF synthesis strategy, we incorporated a solution phase catalyst BINAPO (2,2'-bis(diphenylphosphoryl)-1,1'-binaphthyl) and a modifiable ligand, BDC-NH2 (2-amino-1,4-benzenedicarboxalic acid) into a modifiable homochiral MOF. We successfully modified the free -NH2 groups of the modifiable MOF with cyclic anhydrides proving our material is modifiable. We then used both materials as the catalysts for the cyanosilylation of benzaldehyde. Our materials exhibited modest catalytic activity but our efforts at synthesizing a modifiable homochiral material were successful. For the second method, we introduced two proofs of concept with respect to the generation of uniformly multifunctionalized MOF pores. In Chapter 3 we demonstrated the uniform covalent bifunctionalization of a well-defined MOF, KSU-1, to achieve uniformly multifunctionalized confined spaces, which was the first example of uniform covalent functionalization of a MOF. In Chapter 4, we extended our work to orthogonal functionalization which allowed us to generate a uniformly multifunctionalized MOF, not only through multiple paths, but also in a simultaneous one-pot reaction. Finally, in Chapter 5 we used the methods we developed in Chapter 3 and 4 to construct enzyme inspired chiral Brønsted acid MOF catalysts to use in asymmetric epoxide ring opening. Using our unique strategy of uniform independent bifunctionalization, we successful installed a Brønsted acid catalyst and a chiral group into a well-defined MOF, KSU-1, to obtain our desired catalyst.
Download or read book Advanced Catalysts Based on Metal organic Frameworks Part 2 written by Junkuo Gao and published by Bentham Science Publishers. This book was released on 2023-07-11 with total page 278 pages. Available in PDF, EPUB and Kindle. Book excerpt: Advanced Catalysts Based on Metal-organic Frameworks is a comprehensive introduction to advanced catalysts based on MOFs. It covers basic information about MOF catalysts with industrial and environmental applications. The detailed chapters update readers on current applications and strategies to apply MOF-based catalysts in industrial processes geared for sustainability initiatives such as renewable energy, pollution control and combating carbon emissions. Key Features of Part 2 - 7 structured, easy to read chapters that comprehensively cover specific applications of MOF catalysts- In-depth explanation of photocatalytic reactions for multifunctional electrocatalysis, water splitting and CO2 Capture - Notes on MOF materials used in modern processes - Explanation of MOFs in advanced oxidation reactions - Introduction to Electrochemical biosensors - Updated references for advanced readers The is an essential reference for chemical engineers, scientists in the manufacturing and sustainability industry and post-graduate scholars working on MOFs and chemical catalysis.
Download or read book Metal Organic Framework Materials written by Leonard R. MacGillivray and published by John Wiley & Sons. This book was released on 2014-09-19 with total page 1210 pages. Available in PDF, EPUB and Kindle. Book excerpt: Metal-Organic Frameworks (MOFs) are crystalline compounds consisting of rigid organic molecules held together and organized by metal ions or clusters. Special interests in these materials arise from the fact that many are highly porous and can be used for storage of small molecules, for example H2 or CO2. Consequently, the materials are ideal candidates for a wide range of applications including gas storage, separation technologies and catalysis. Potential applications include the storage of hydrogen for fuel-cell cars, and the removal and storage of carbon dioxide in sustainable technical processes. MOFs offer the inorganic chemist and materials scientist a wide range of new synthetic possibilities and open the doors to new and exciting basic research. Metal-Organic Frameworks Materials provides a solid basis for the understanding of MOFs and insights into new inorganic materials structures and properties. The volume also reflects progress that has been made in recent years, presenting a wide range of new applications including state-of-the art developments in the promising technology for alternative fuels. The comprehensive volume investigates structures, symmetry, supramolecular chemistry, surface engineering, recognition, properties, and reactions. The content from this book will be added online to the Encyclopedia of Inorganic and Bioinorganic Chemistry: http://www.wileyonlinelibrary.com/ref/eibc
Download or read book Metal Based Catalysts in Organic Synthesis written by Manas Sutradhar and published by MDPI. This book was released on 2021-08-30 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt: Catalysts play a crucial role in the path towards the transformation of organic compounds. This book describes the recent development of metal-based catalysis in organic synthesis. Applications of various catalysts to interesting organic transformations are discussed. It covers important organic reactions such as cyclohexane oxidation under different energy stimuli, use of Pd-nanoparticles for carbonylation of aniline, ammoximation of methyl ethyl ketone by Ni-modified TS-1 and carbozincation of substituted 2-alkynylamines. This book will be a useful reference for researchers in the field of catalysis, organic chemistry and materials science. It is also intended to attract the attention of researchers with an industrial 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 Advancing Frontiers in Reactive and Selective Iridium C h Borylation Catalysis and Targeted Silsesquioxane Synthesis written by Jonathan E. Dannatt and published by . This book was released on 2019 with total page 521 pages. Available in PDF, EPUB and Kindle. Book excerpt: The studies in this dissertation are aimed at uncovering reactive and selective Ir-catalyzed C-H borylation (CHB) catalysts. Due to the high versatility of organoboron species, green methodology to produce the C-B bond is poised to support a myriad of subsequent transformations. These transformations include Suzuki couplings, aminations, oxidations, halogenations, cyanations, and trifluoromethylations.Typical iridium catalyzed CHBs proceed through an iridium trisboryl with a bidentate ligand such as bipyridine or 1,10-phenanthroline. The selectivity of these standard catalysts is generally driven by sterics; however, many methods of overcoming the steric bias have been developed in the two decades since the first thermal catalytic C-H activation borylation. These methods include both inner- and outer-sphere directed mechanisms. Outer-sphere directed borylations have been accomplished by leveraging hydrogen bonding, Lewis acid-base, and ion-pairing as directing elements. In general this reactivity is activated by precise design of the bidentate ligand framework.Herein is reported a subtle electrostatic interaction to direct ortho-borylation of phenols by simply switching boron source from the common B2pin2 (pin = pinacolate) to B2eg2 (eg = ethyleneglycolate). This electrostatic interaction was revealed by a careful computational analysis of key C-H activation transition states. Understanding gained by the computational studies led to the redesign of the boron source which enabled by selectivities of > 99% ortho borylation. This methodology was extended to the highly selective ortho-borylation of anilines, and the underlying mechanism has been interrogated.Currently, iridium based catalysts have been generated to borylate ortho, meta, and even para to a variety of classes of substrates; however, control of selectivity can breakdown in many fluorinated arenes without a directing group. These substrates are challenging because the fluoro moiety being similar in size to a hydrogen offers little in the way of steric bias. While working to overcome these challenges, a serendipitously discovered hydrazone based ligand was discovered. Exploration of the catalysts generated by this ligand revealed not only impressive activity rivaling dtbpy but also incredible selectivity for meta to a fluoro group.In general iridium CHB catalysts selectively activate sp2 C-H bonds leaving all sp3 C-H bonds intact; however, a method to turn on sp3 C-H activation would be desirable. It was reasoned that a directing group able to increase the effective concentration of the iridium catalyst near a C(sp3)-H bond may enable this transformation. Indeed, it was discovered that catalysts able to accept amide directing groups were able to selectively borylate compounds with amide N-methyl substituents.
Download or read book Metal Organic Frameworks written by Leonard R. MacGillivray and published by John Wiley & Sons. This book was released on 2010-12-17 with total page 440 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book Advanced Structural Chemistry written by Rong Cao and published by John Wiley & Sons. This book was released on 2021-06-28 with total page 1088 pages. Available in PDF, EPUB and Kindle. Book excerpt: Advanced Structural Chemistry Discover the relationships between inorganic chemical synthesis, structure, and property with these comprehensive and insightful volumes Advanced Structural Chemistry: Tailoring Properties of Inorganic Materials and their Applications (3 Volume Set) offers readers the opportunity to discover the relationship between the structure and function of matter, develop efficient and precise synthesis methodology, and to understand the theoretical tools for new functional substances. Advanced Structural Chemistry clarifies the relationships between synthesis and structure, as well as structure and property, both of which are central to the creation of new materials with unique functions. In addition to subjects like the syntheses of metal-oxide clusters, metal-organic cages, and metal-organic frameworks with tailored optical, electric, ferroelectric, magnetic, adsorption, separation, and catalytic properties, the accomplished editor Rong Cao provides readers with information on a wide variety of topics, such as: Coordination-assembled metal-organic macrocycles and cages, including metallacycles and metallacages The structural chemistry of metal-oxo clusters, including the oxo clusters of transition metal, main group metal, and lanthanides Synthetic approaches, structural diversities, and biological aspects of molybdenum-based heterometallic sulfide clusters and coordination polymers Group 11-15 metal chalcogenides, including discrete chalcogenide clusters synthesized in ionic liquids The structures of metal-organic frameworks, including one-, two-, and three-dimensional MOFs Perfect for inorganic chemists, structural chemists, solid state chemists, material scientists, and solid state physicists, Advanced Structural Chemistry also belongs on the bookshelves of catalytic and industrial chemists who seek to improve their understanding of the structure and functions of inorganic materials.
Download or read book Cross Coupling Reactions written by Norio Miyaura and published by Springer. This book was released on 2003-07-01 with total page 253 pages. Available in PDF, EPUB and Kindle. Book excerpt: In 1972, a very powerful catalytic cycle for carbon-carbon bond formation was 2 first discovered by the coupling reaction of Grignard reagents at the sp -carbon. Over the past 30 years, the protocol has been substantially improved and expanded to other coupling reactions of Li,B,N,O,Al,Si,P,S,Cu,Mn,Zn,In,Sn, and Hg compounds. These reactions provided an indispensable and simple methodology for preparative organic chemists. Due to the simplicity and rel- bility in the carbon-carbon, carbon-heteroatom, and carbon-metalloid bo- formations,as well as high efficiency of the catalytic process,the reactions have been widely employed by organic chemists in various fields. Application of the protocol ranges from various syntheses of complex natural products to the preparation of biologically relevant molecules including drugs, and of sup- molecules, and to functional materials. The reactions on solid surfaces allow robot synthesis and combinatorial synthesis. Now, many organic chemists do not hesitate to use transition metal complexes for the transformation of org- ic molecules. Indeed, innumerable organic syntheses have been realized by the catalyzed reactions of transition metal complexes that are not achievable by t- ditional synthetic methods. Among these, the metal-catalyzed cross-coupling reactions have undoubtedly contributed greatly to the development of such a new area of “metal-catalyzed organic syntheses”. An excellent monograph for the cross-coupling reactions and other met- catalyzed C-C bond-forming reactions recently appeared in Metal-catalyzed Cross-coupling Reactions (Wiley-VCH,1998).
