Design Of Redox Active Ligands

Download Design Of Redox Active Ligands full books in PDF, epub, and Kindle. Read online Design Of Redox Active Ligands ebook anywhere anytime directly on your device. Fast Download speed and no annoying ads. We cannot guarantee that every ebooks is available!

Ligand Design in Metal Chemistry

Author : Mark Stradiotto
Publisher : John Wiley & Sons
ISBN 13 : 1118839811
Total Pages : 448 pages
Book Rating : 4.1/5 (188 download)

DOWNLOAD NOW!

Book Synopsis Ligand Design in Metal Chemistry by : Mark Stradiotto

Download or read book Ligand Design in Metal Chemistry written by Mark Stradiotto and published by John Wiley & Sons. This book was released on 2016-09-01 with total page 448 pages. Available in PDF, EPUB and Kindle. Book excerpt: The design of ancillary ligands used to modify the structural and reactivity properties of metal complexes has evolved into a rapidly expanding sub-discipline in inorganic and organometallic chemistry. Ancillary ligand design has figured directly in the discovery of new bonding motifs and stoichiometric reactivity, as well as in the development of new catalytic protocols that have had widespread positive impact on chemical synthesis on benchtop and industrial scales. Ligand Design in Metal Chemistry presents a collection of cutting-edge contributions from leaders in the field of ligand design, encompassing a broad spectrum of ancillary ligand classes and reactivity applications. Topics covered include: Key concepts in ligand design Redox non-innocent ligands Ligands for selective alkene metathesis Ligands in cross-coupling Ligand design in polymerization Ligand design in modern lanthanide chemistry Cooperative metal-ligand reactivity P,N Ligands for enantioselective hydrogenation Spiro-cyclic ligands in asymmetric catalysis This book will be a valuable reference for academic researchers and industry practitioners working in the field of ligand design, as well as those who work in the many areas in which the impact of ancillary ligand design has proven significant, for example synthetic organic chemistry, catalysis, medicinal chemistry, polymer science and materials chemistry.

Design of Electronic Devices Using Redox-Active Organic Molecules and Their Porous Coordination Networks

Author : Jaejun Kim
Publisher : Springer Nature
ISBN 13 : 9811639078
Total Pages : 86 pages
Book Rating : 4.8/5 (116 download)

DOWNLOAD NOW!

Book Synopsis Design of Electronic Devices Using Redox-Active Organic Molecules and Their Porous Coordination Networks by : Jaejun Kim

Download or read book Design of Electronic Devices Using Redox-Active Organic Molecules and Their Porous Coordination Networks written by Jaejun Kim and published by Springer Nature. This book was released on 2021-08-23 with total page 86 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book addresses the development of electronic devices using redox-active organic molecules and their porous coordination networks (PCNs), and highlights the importance of the molecular arrangement. Redox-active organic molecules hold considerable promise as flexible electronic elements, because their electronic state can easily be controlled using external energy. Although various kinds of redox-active organic molecules have been synthesized, attempts to apply them to electronic devices have been limited, owing to the lack of proper structural design. Moreover, ligand-based redox-active PCNs remain largely unexplored because of the limited availability of redox-active ligands. In addition to developing new redox-active organic molecules, in order to design electronic devices based on these molecules/PCNs, it is essential to understand the connections between their molecular arrangement, electrical properties, and redox activity. In this thesis, the redox-active organic molecule 2,5,8-tri(4-pyridyl)1,3-diazaphenalene (TPDAP), which features a large pi plane and multi-intermolecular interactivity, is used to develop a resistive switching memory device. In addition, its PCNs are synthesized to fabricate chemiresistive sensors, and the electrical properties are modulated using post-synthetic modification. Each mechanism is systematically investigated by means of structural determination and well-defined control experiments. Subsequently, the book proposes general guidelines for designing electronic devices using redox-active organic molecules. The book will appeal to a broad range of readers, from basic scientists to materials engineers, as well as general, non-expert readers.

Design of Redox-active Ligands

Author : Nico Matteo Bonanno
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (134 download)

DOWNLOAD NOW!

Book Synopsis Design of Redox-active Ligands by : Nico Matteo Bonanno

Download or read book Design of Redox-active Ligands written by Nico Matteo Bonanno and published by . This book was released on 2021 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis describes the design, synthesis, properties, and coordination chemistry of redoxactive ligands. This thesis also explores new ways of expanding our ligand systems, in order to improve their binding capacities. We accomplished this by utilizing familiar redox-active moieties and structures to those published previously in our group, but with enhanced topological capacities and predictable structural outcomes. Chapter 1 begins with a general outline of the fundamental principles that govern organic radicals including; their reactivity, their properties and applications, and how these can be applied to the design of ligands for polynuclear assembly. Chapter 2 starts with a brief overview of arylazo ligands and the synthesis of a new hydrazone substituted phenalenol ligand (2.1). In the following section (2.2) we use this ligand to produce homoleptic ligand mixed-valence complexes featuring trivalent cobalt and iron metals. The chapter is concluded (2.3) with the synthesis of a new ditopic aryl-azo ligand and its cobalt coordination chemistry involving a neutral tetra-radical/tetra-nuclear molecular grid featuring valence tautomerism. Chapter 3 begins with the design and synthesis of a new ditopic diamino phenol ligand, which was found to oxidize to a neutral stable phenoxyl radical (3.1-3.2). The solution properties, which include reversible pi-dimerization of this stable radical are also described (3.3), and later the substitution chemistry of this new ligand is explored (3.4). In chapter 4, we describe the coordination chemistry of this new ditopic aminophenol ligand, which includes assembly into several coordination clusters involving copper (4.2), iron (4.3), nickel (4.4), and zinc (4.5). These coordination clusters feature the ligand in a variety of oxidation states; including rare examples of dianion "aminyl" radical clusters. In chapter 5, we begin with a description of a new synthetic derivative which can be used for the construction of larger tetratopic or asymmetric diamino phenol ligands. In 5.2 we describe the synthesis of a tetratopic aminophenol ligand along with its reactivity and aerial oxidation to a tri-phenoxyl radical. In 5.3, we conclude the thesis with the use of an asymmetric diamino phenol ligand and it's Cu(II/III) coordination chemistry, which displayed unique reactivity with molecular oxygen.

Redox-Active Ligands

Author : Marine Desage-El Murr
Publisher : John Wiley & Sons
ISBN 13 : 352783088X
Total Pages : 373 pages
Book Rating : 4.5/5 (278 download)

DOWNLOAD NOW!

Book Synopsis Redox-Active Ligands by : Marine Desage-El Murr

Download or read book Redox-Active Ligands written by Marine Desage-El Murr and published by John Wiley & Sons. This book was released on 2024-01-31 with total page 373 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.

Organometallic Pincer Chemistry

Author : Gerard van Koten
Publisher : Springer
ISBN 13 : 3642310818
Total Pages : 363 pages
Book Rating : 4.6/5 (423 download)

DOWNLOAD NOW!

Book Synopsis Organometallic Pincer Chemistry by : Gerard van Koten

Download or read book Organometallic Pincer Chemistry written by Gerard van Koten and published by Springer. This book was released on 2012-09-17 with total page 363 pages. Available in PDF, EPUB and Kindle. Book excerpt: Gerard van Koten: The Mono-anionic ECE-Pincer Ligand - a Versatile Privileged Ligand Platform: General Considerations.- Elena Poverenov, David Milstein: Non-Innocent Behavior of PCP and PCN Pincer Ligands of Late Metal Complexes.- Dean M. Roddick: Tuning of PCP Pincer Ligand Electronic and Steric Properties.- Gemma R. Freeman, J. A. Gareth Williams: Metal Complexes of Pincer Ligands: Excited States, Photochemistry, and Luminescence.- Davit Zargarian, Annie Castonguay, Denis M. Spasyuk: ECE-Type Pincer Complexes of Nickel.- Roman Jambor and Libor Dostál: The Chemistry of Pincer Complexes of 13 - 15 Main Group Elements.- Kálmán J. Szabo: Pincer Complexes as Catalysts in Organic Chemistry.- Jun-ichi Ito and Hisao Nishiyama: Optically Active Bis(oxazolinyl)phenyl Metal Complexes as Multi-potent Catalysts.- Anthony St. John, Karen I. Goldberg, and D. Michael Heinekey: Pincer Complexes as Catalysts for Amine Borane Dehydrogenation.- Dmitri Gelman and Ronit Romm: PC(sp3)P Transition Metal Pincer Complexes: Properties and Catalytic Applications.- Jennifer Hawk and Steve Craig: Physical Applications of Pincer Complexes.

Bioinspired Design of Redox-active Ligands for Multielectron Catalysis

Author :
Publisher :
ISBN 13 :
Total Pages : 19 pages
Book Rating : 4.:/5 (925 download)

DOWNLOAD NOW!

Book Synopsis Bioinspired Design of Redox-active Ligands for Multielectron Catalysis by :

Download or read book Bioinspired Design of Redox-active Ligands for Multielectron Catalysis written by and published by . This book was released on 2015 with total page 19 pages. Available in PDF, EPUB and Kindle. Book excerpt: Mononuclear metalloenzymes in nature can function in cooperation with precisely positioned redox-active organic cofactors in order to carry out multielectron catalysis. Inspired by the finely tuned redox management of these bioinorganic systems, we present the design, synthesis, and experimental and theoretical characterization of a homologous series of cobalt complexes bearing redox-active pyrazines. These donor moieties are locked into key positions within a pentadentate ligand scaffold in order to evaluate the effects of positioning redox non-innocent ligands on hydrogen evolution catalysis. Both metal- and ligand-centered redox features are observed in organic as well as aqueous solutions over a range of pH values, and comparison with analogs bearing redox-inactive zinc(II) allows for assignments of ligand-based redox events. Varying the geometric placement of redox non-innocent pyrazine donors on isostructural pentadentate ligand platforms results in marked effects on observed cobalt-catalyzed proton reduction activity. Electrocatalytic hydrogen evolution from weak acids in acetonitrile solution, under diffusion-limited conditions, reveals that the pyrazine donor of axial isomer 1-Co behaves as an unproductive electron sink, resulting in high overpotentials for proton reduction, whereas the equatorial pyrazine isomer complex 2-Co is significantly more active for hydrogen generation at lower voltages. Addition of a second equatorial pyrazine in complex 3-Co further minimizes overpotentials required for catalysis. The equatorial derivative 2-Co is also superior to its axial 1-Co congener for electrocatalytic and visible-light photocatalytic hydrogen generation in biologically relevant, neutral pH aqueous media. Density functional theory calculations (B3LYP-D2) indicate that the first reduction of catalyst isomers 1-Co, 2-Co, and 3-Co is largely metal-centered while the second reduction occurs at pyrazine. Taken together, the data establish that proper positioning of non-innocent pyrazine ligands on a single cobalt center is indeed critical for promoting efficient hydrogen catalysis in aqueous media, akin to optimally positioned redox-active cofactors in metalloenzymes. In a broader sense, these findings highlight the significance of electronic structure considerations in the design of effective electron-hole reservoirs for multielectron transformations.

Redox-Active Ligands

Author : Marine Desage-El Murr
Publisher : John Wiley & Sons
ISBN 13 : 3527348506
Total Pages : 373 pages
Book Rating : 4.5/5 (273 download)

DOWNLOAD NOW!

Book Synopsis Redox-Active Ligands by : Marine Desage-El Murr

Download or read book Redox-Active Ligands written by Marine Desage-El Murr and published by John Wiley & Sons. This book was released on 2024-02-05 with total page 373 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.

Reactions at Coordinated Ligands: Redox-active Ligands and Coordination of Lewis Acids

Author : Mark R. Ringenberg
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (774 download)

DOWNLOAD NOW!

Book Synopsis Reactions at Coordinated Ligands: Redox-active Ligands and Coordination of Lewis Acids by : Mark R. Ringenberg

Download or read book Reactions at Coordinated Ligands: Redox-active Ligands and Coordination of Lewis Acids written by Mark R. Ringenberg and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The theme of this study is reactivity at the ligand and how remote, relative to the metal, activation affects the metal center. The three approaches were the use of redox-active ligands, ligand protonation and Lewis acid coordination to ligands. The focus is on ligand design rather than substrate or metal optimization with a primary interest in reactivity with dihydrogen. The main thrust of the work has been the investigation of redox-active ligands in which redox occurs at the ligand. Redox-active ligands have been generally a curiosity in organometallic chemistry and have only recently been realized in catalysis. Presented here is one of the first examples of a system that incorporates redox-active ligands as a critical component to the catalysts. The complexes utilizing redox-active ligands became Lewis acidic upon oxidation, similar in behavior to the Noyori type catalyst that became Lewis acidic upon protonation. The catalysts containing redox-active ligand were used for the oxidation of H2. The interest in H2 oxidation is the hope that it will fulfill the need for a new fuel source. This interest has lead to the development of soluble catalyst that can oxidize H2 to protons and electrons, in order to further study the mechanism. Redox-active ligands have lower reorganizational barriers because redox at organic substituents are typically lower than for inorganic centers. Furthermore, redox-active ligands can supplement the electrons/holes transferred from the metal, which can facilitate reactions that require multi-electron transfers. The next theme was the use of borane Lewis acids bound to a coordinated ligand, which dramatically changed the ligands from a donor to an acceptor. This type of reaction at the ligand fundamentally changes the reactivity at the metal, however, the affects are not as dramatic as say substituting the ligand. A largh enough change in ligand polarity can affect oxidation-state at the metal. The oxidation state of a metal becomes very difficult to assign when multiple electronic structures exist between the metal and the ligand. In fact in many ways the concept of metal oxidation state becomes meaningless as the electronic structure of the ligand becomes more complicated. These subtler changes in ligand oxidation state and the affects they have on reactivity at metal have not been as widely explored in catalysis. Remote activation of a metal center through reacts at coordinated ligands will be explored here in. The coordination of boranes to cyanide ligands is well know, however, this theme has not been applied to hydrogenase models. Cyanide is an essential component of the [FeFe]- and [NiFe]-hydrogenase active sites, both enzymes feature two cyanide ligands, however, models using cyanides ligands are plagued by undesirable side reactions such as metal-cyanide bridged polymers and decomposition. The bound boranes are used to simulate the hydrogen bonding found in the enzymes. The complexation of Lewis acids to cyanides offers an advantage over alkylation, in that the inductive affect of the borane can be tuned to better approximate the correct level of hydrogen bonding found in the enzyme.

Spin States in Biochemistry and Inorganic Chemistry

Author : Marcel Swart
Publisher : John Wiley & Sons
ISBN 13 : 1118898303
Total Pages : 472 pages
Book Rating : 4.1/5 (188 download)

DOWNLOAD NOW!

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 and published by John Wiley & Sons. This book was released on 2015-09-17 with total page 472 pages. 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.

Design and Synthesis of a Series of Redox Active Tetrazine and Triazine Based Transition Metal Complexes

Author : Yixin Zhang
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (129 download)

DOWNLOAD NOW!

Book Synopsis Design and Synthesis of a Series of Redox Active Tetrazine and Triazine Based Transition Metal Complexes by : Yixin Zhang

Download or read book Design and Synthesis of a Series of Redox Active Tetrazine and Triazine Based Transition Metal Complexes written by Yixin Zhang and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The use of two different chelating redox active ligands, 2,6-bis(6-methyl-1,2,4,5-3-yl) pyridine (BTZP) and 2,6-bis-(5,6-dialkyl-1,2,4-triazin-3-yl)-pyridine (BTP) in heterometallic first row and second row transition metal chemistry has yielded two new families of redox active metal complexes. These complexes were found to exhibit interesting electrochemical and magnetic properties. In this thesis, Chapter 1 lays the foundation for the research presented within. This section covers the fundamentals of the ligand design, ligand synthesis and related coordination chemistry literature review. Chapters 2 and 3 report the results of the current thesis. In Chapter 2, the synthesis and characterization of a family of discrete molecules and supramolecular arrangements, employing the ligand BTZP, is presented. All of the complexes presented in Chapter 2 are successfully synthesized and characterized with electrochemical and magnetic studies. According to the electrochemical data, it is found that the classic "terpy-like" complexes with [Co(BTZP) 2]2+ formula fosters more stability in the redox process. In Chapter 3, a family of transition metal complexes with [M(BTP) 2]2+ (M=Fe or Co) inorganic cores were obtained through the employment of the ligand BTP with various anions. In addition, dimeric molecules with [CoX4(BTP)2] formula were also obtained by solvothermal synthesis. The complexes were also electrochemically characterized, with all the complexes capable of being reduced, while only [CoII(BTP)2] (ClO4)2 showed reversible redox process. Similar with BTZP, the series of BTP based complexes are also characterized through magnetic measurement. Only cobalt-based BTP complexes are paramagnetic, with [CoII(BTP)2]2+ being spin crossover active when BF4- and ClO4- are present. However, the presence of NCS- and halides lead to either antiferromagnetic interactions and ferromagnetic interactions dominating at different temperature regimes.

The Age of Noninnocence

Author : Seth N. Brown
Publisher : Wiley
ISBN 13 : 9781118646854
Total Pages : 368 pages
Book Rating : 4.6/5 (468 download)

DOWNLOAD NOW!

Book Synopsis The Age of Noninnocence by : Seth N. Brown

Download or read book The Age of Noninnocence written by Seth N. Brown and published by Wiley. This book was released on 2017-01-24 with total page 368 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents a comprehensive introduction to the unique and fundamental features of redox-active ligands, the preparation and characterization of their coordination complexes, and finally the importance of this class of molecules to biology, catalysis and materials. The book aims to provide a broadly accessible introduction to the particular features and opportunities unique to redox-active ligands. It begins with an introduction to the intellectual challenges posed by redox-active ligands and descriptions of the types of ligands and complexes in which ligand-centered redox activity are commonly observed. Following this, the book is divided into two sections as follows: The first section focuses on electronic structure and bonding, which has historically dominated this field and continues to be actively researched. The spectroscopic and other physical measurements that have been used to elucidate the electronic structure of these compounds are described. The interplay between synthesis, bonding models, and physical measurements has often been critical in shaping our understanding of these compounds. This interplay is illustrated by a number of case studies. The second section focuses on the use of redox-active complexes in stoichiometric and catalytic reactions. The scope of known reactions is presented, including examples from bioinorganic chemistry (both enzymes and model compounds). Where possible, the significance of the redox-active ligand is discussed, with an eye both to summarizing existing knowledge and pointing out possibilities for future research. This book explains the underpinnings of physical and theoretical techniques of redox-active ligands, providing up to date information on definitions, scope and applications for research scientists and graduate students working in organic and inorganic chemistry, organometallics and coordination chemistry.

Redox-Active Therapeutics

Author : Ines Batinić-Haberle
Publisher : Springer
ISBN 13 : 3319307053
Total Pages : 709 pages
Book Rating : 4.3/5 (193 download)

DOWNLOAD NOW!

Book Synopsis Redox-Active Therapeutics by : Ines Batinić-Haberle

Download or read book Redox-Active Therapeutics written by Ines Batinić-Haberle and published by Springer. This book was released on 2016-10-13 with total page 709 pages. Available in PDF, EPUB and Kindle. Book excerpt: This essential volume comprehensively discusses redox-active therapeutics, focusing particularly on their molecular design, mechanistic, pharmacological and medicinal aspects. The first section of the book describes the basic aspects of the chemistry and biology of redox-active drugs and includes a brief overview of the redox-based pathways involved in cancer and the medical aspects of redox-active drugs, assuming little in the way of prior knowledge. Subsequent sections and chapters describe more specialized aspects of central nervous system injuries, neurodegenerative diseases, pain, radiation injury and radioprotection (such as of brain, lungs, head and neck and erectile function) and neglected diseases (e.g., leishmaniasis). It encompasses several major classes of redox-active experimental therapeutics, which include porphyrins, salens, nitrones, and most notably metal-containing (e.g., Mn, Fe, Cu, Zn, Sb) drugs as either single compounds or formulations with nanomaterials and quantum dots. Numerous illustrations, tables and figures enhance and complement the text; extensive references to relevant literature are also included. Redox-Active Therapeutics is an invaluable addition to Springer’s Oxidative Stress in Applied Basic Research and Clinical Practice series. It is essential reading for researchers, clinicians and graduate students interested in understanding and exploring the Redoxome—the organism redox network—as an emerging frontier in drug design, redox biology and medicine.

Controlling Redox Processes in Metal Complexes and Multifunctional Materials

Author : Khrystyna Herasymchuk
Publisher :
ISBN 13 :
Total Pages : 207 pages
Book Rating : 4.:/5 (124 download)

DOWNLOAD NOW!

Book Synopsis Controlling Redox Processes in Metal Complexes and Multifunctional Materials by : Khrystyna Herasymchuk

Download or read book Controlling Redox Processes in Metal Complexes and Multifunctional Materials written by Khrystyna Herasymchuk and published by . This book was released on 2020 with total page 207 pages. Available in PDF, EPUB and Kindle. Book excerpt: Transition metal complexes incorporating redox-active ligands have the potential to facilitate controlled multielectron chemistry, enabling their use in catalysis and energy storage applications. Moreover, the use of transition metal complexes containing redox-active ligands has been extended to two- (2D) and three-dimensional (3D) materials, such as supramolecular assemblies (i.e., metallacycles, molecular cages, or macrocycles) and metal-organic frameworks (MOFs) for catalytic, magnetic, electronic, and sensing applications. Salens (N2O2 bis(Schiff-base)-bis(phenolate) are an important class of redox-active ligands, and have been investigated in detail as they are able to stabilize both low and high metal oxidation states for the above-mentioned applications. The work in this thesis focuses on the synthesis and electronic structure elucidation of metal salen complexes in monomeric form, as discrete supramolecular assemblies and 3D MOFs. Structural and spectroscopic characterization of the neutral and oxidized species was completed using mass spectrometry, cyclic voltammetry, X-ray diffraction, NMR, UV-Vis-NIR, and EPR spectroscopies, as well as theoretical (DFT) calculations. Chapter 2 discusses the synthesis and electronic structure evaluation of a series of oxidized uranyl complexes, containing redox-active salen ligands with varying para-ring substituents (tBu, OMe, NMe2). Chapters 3 and 4 discuss the incorporation of a redox-active nickel salen complex equipped with pyridyl groups on the peripheral positions of the ligand framework into supramolecular structures via coordination-driven self-assembly. The self-assembly results in formation of a number of distinct metallacycles, affording di-, tetra-, and octa-ligand radical species. Finally, the design, synthesis, and incorporation of metal salen units into MOFs is discussed in Chapter 5. Preliminary assembly and oxidation experiments are presented as an opportunity to explore the redox-properties of salen complexes incorporated into a solid-state 3D framework. Overall, the work described in this thesis provides a pathway for salen ligand radical systems to be used in redox-controlled host-guest chemistry, catalysis, and sensing.

Lanthanide Single Molecule Magnets

Author : Jinkui Tang
Publisher : Springer
ISBN 13 : 3662469995
Total Pages : 219 pages
Book Rating : 4.6/5 (624 download)

DOWNLOAD NOW!

Book Synopsis Lanthanide Single Molecule Magnets by : Jinkui Tang

Download or read book Lanthanide Single Molecule Magnets written by Jinkui Tang and published by Springer. This book was released on 2015-04-24 with total page 219 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book begins by providing basic information on single-molecule magnets (SMMs), covering the magnetism of lanthanide, the characterization and relaxation dynamics of SMMs and advanced means of studying lanthanide SMMs. It then systematically introduces lanthanide SMMs ranging from mononuclear and dinuclear to polynuclear complexes, classifying them and highlighting those SMMs with high barrier and blocking temperatures – an approach that provides some very valuable indicators for the structural features needed to optimize the contribution of an Ising type spin to a molecular magnet. The final chapter presents some of the newest developments in the lanthanide SMM field, such as the design of multifunctional and stimuli-responsive magnetic materials as well as the anchoring and organization of the SMMs on surfaces. In addition, the crystal structure and magnetic data are clearly presented with a wealth of illustrations in each chapter, helping newcomers and experts alike to better grasp ongoing trends and explore new directions. Jinkui Tang is a professor at Changchun Institute of Applied Chemistry, Chinese Academy of Sciences. Peng Zhang is currently pursuing his PhD at Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, with a specific focus on the molecular magnetism of lanthanide compounds under the supervision of Prof. Jinkui Tang.

Mineral Surfaces

Author : D. Vaughan
Publisher : Springer
ISBN 13 :
Total Pages : 388 pages
Book Rating : 4.:/5 (318 download)

DOWNLOAD NOW!

Book Synopsis Mineral Surfaces by : D. Vaughan

Download or read book Mineral Surfaces written by D. Vaughan and published by Springer. This book was released on 1995 with total page 388 pages. Available in PDF, EPUB and Kindle. Book excerpt: 30% discount for members of The Mineralogical Society of Britain and Ireland This text summarises the state-of-the-art in the study of mineral surfaces and some of the key applications of surface science in mineralogy and mineral chemistry. Each chapter covers a particular aspect of the subject and is written by an expert who raises the key issues involved for those requiring an introduction to the subject, whilst highlighting most recent developments. Advanced undergraduates, postgraduates and researchers alike will find this essential reading as it is the first book to review the fast developing field of mineral surfaces.

Elucidating the Electronic Structure of Transition Metal Complexes Featuring Redox Active Ligands

Author : Linus Kai Ho Chiang
Publisher :
ISBN 13 :
Total Pages : 187 pages
Book Rating : 4.:/5 (112 download)

DOWNLOAD NOW!

Book Synopsis Elucidating the Electronic Structure of Transition Metal Complexes Featuring Redox Active Ligands by : Linus Kai Ho Chiang

Download or read book Elucidating the Electronic Structure of Transition Metal Complexes Featuring Redox Active Ligands written by Linus Kai Ho Chiang and published by . This book was released on 2014 with total page 187 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this thesis a number of projects involving the design and characterization of complexes bearing redox active ligands are described. Focusing on the phenolate containing ligands, the properties and electronic structure of their corresponding metal complexes were studied by a series of experimental (i.e. electrochemistry, UV-Vis-NIR, EPR, rR etc.) and theoretical (DFT) methods. Specifically, the redox processes of these metal complexes were tuned by varying the para-ring substituents. In one study, nickel-salen (salen is a common abbreviation for N2O2 bis-Schiff-base bis-phenolate ligands) complexes were investigated, where the oxidation potentials of the ligand were predictably decreased as the electron donating ability of the para-ring substituents was increased (NMe2 > OMe > tBu > CF3). Interestingly, the oxidation of these geometrically-symmetric complexes afforded an asymmetric electronic structure in a number of cases, in which the ligand radical was localized on one phenolate rather than delocalized across the ligand framework. This difference in electronic structure was found to be dependent on the electron donating ability of the substituents; a delocalized ligand radical was observed for electron-withdrawing substituents and a localized ligand radical for strongly donating substituents. These studies highlight that para-ring substituents can be used to tune the electronic structure (metal vs. ligand based, localized vs. delocalized radical character) of metallosalen complexes. To evaluate if this electronic tuning can be applied to the metal center, a series of cobalt complexes of these salen ligands were prepared. Indeed, the electronic properties of the metal center were also significantly affected by para-ring substitution. These cobalt-salen complexes were tested as catalysts in organometallic radical-mediated polymerizations, where the most electron rich complexes displayed the best conversion rates. With a firm understanding of the role that the para-ring substituent can play in influencing the electronic structure and reactivity of metallosalen complexes in catalysis, two novel iron complexes, which contain a number of redox active phenolate fragments, were prepared. In addition, these iron-complexes feature a chiral bipyrrolidine backbone. Ligands with this chiral diamine backbone bind metals ions diastereoselectively owing to its increased rigidity, which is critical to stereoselectivity in catalysis. A symmetric (with two phenolates) ligand was prepared by reported methods, and a novel route to synthesize an asymmetric ligand (one phenolate and one pyridine) from symmetric starting materials was established. The neutral iron-complexes were found to be high spin (S = 5/2), and can undergo ligand based oxidation to form an antiferromagnetically-coupled (Stotal = 2) species. The results presented will serve as the basis for catalyst development using complexes of similar ligands.

Synthesis and Ligand-Enabled Reactivity of Transition Metal Complexes Bearing a Redox-Active Bis(phenoxy)amide Ligand

Author : Aaron M. Hollas
Publisher :
ISBN 13 : 9781369227055
Total Pages : 188 pages
Book Rating : 4.2/5 (27 download)

DOWNLOAD NOW!

Book Synopsis Synthesis and Ligand-Enabled Reactivity of Transition Metal Complexes Bearing a Redox-Active Bis(phenoxy)amide Ligand by : Aaron M. Hollas

Download or read book Synthesis and Ligand-Enabled Reactivity of Transition Metal Complexes Bearing a Redox-Active Bis(phenoxy)amide Ligand written by Aaron M. Hollas and published by . This book was released on 2016 with total page 188 pages. Available in PDF, EPUB and Kindle. Book excerpt: The work described herein focuses on the ability of redox-active ligands to enable multi-electron reactivity at transition metal centers. A parallel theme is the effect of ancillary ligands on controlling and modulating the electronic structure of the redox-active ligand and metal center in addition to ancillary ligand effects as they relate to controlling the primary coordination sphere of the metal. (Abstract shortened by ProQuest.).