Download or read book The Design Synthesis and Characterization of Crystalline Molecular Machines with High Structural and Dynamic Complexities written by Xing Jiang and published by . This book was released on 2016 with total page 224 pages. Available in PDF, EPUB and Kindle. Book excerpt: Molecular machines are molecular and supramolecular entities capable of producing quasi-mechanical movements. While many examples of functional artificial molecular machines have been studied in solution, crystalline aggregates of molecular machines have been explored infrequently because of the limited freedom of motion in closely packed solids. Although previous work on amphidynamic crystals has demonstrated that rotational dynamics in crystals could be achieved and engineered by proper structural design, the existing examples are limited to simple structures and small dynamic groups. As part of the efforts to prepare artificial molecular machines capable of performing useful work, the goals of my doctoral research were to design and synthesize crystalline molecular rotors with complex structures and explore their dynamics with solid-state NMR spectroscopy. I have prepared two shape-persistent dendritic molecular rotors with molecular weight over 2000 Da by different synthetic strategies. The molecular rotor prepared by a convergent synthesis provided crystals with a low packing density, which allowed megahertz rotation of all aromatic groups in the rotor. The softening of local environments with temperature, resulting from the dynamics of virtually all components in the crystal, led to a new concept of crystal fluidity. The divergent strategy used in the synthesis of the other macromolecular rotor made it possible to incorporate large rotator groups in the structure. When a bulky triptycene group was used, the shape-persistent rotor was able to support its kilohertz rotation in a semicrystalline sample. In order to realize faster triptycene rotations and to understand the structural elements required for effective solid-state gearing motions, I designed and prepared three pillared paddlewheel MOFs. I demonstrated that megahertz rotation of triptycene could be realized in a catenation-free framework, which offered a loose environment for the rotator. Since the rotator is in close contact only with the solvent molecules, its rotation is dictated solely by the hydrodynamic behavior of DMF and constitutes a diffusion-controlled process. As a result, the temperature dependence of observed rotation could shed light on the effective viscosity change of trapped solvents with temperature.
Download or read book Studies on Structures and Dynamics of Polarizable Crystalline Solids written by Zhiyu Liu and published by . This book was released on 2022 with total page 150 pages. Available in PDF, EPUB and Kindle. Book excerpt: Molecular machines have become the focus in field of physical organic chemistry given the advances in synthesis and characterization in recent decades. Identifying motions in molecular machines thus become key knowledge that researchers need in order to design and understand molecular machines. Even though molecular machines such as ATP synthase are universal in nature, designing molecular machines with complex functions remains a great challenge. To achieve such goals, one must explore basic machine functions, such as gearing, translation, locking and rotation, at the molecular level. In this dissertation, rotations are investigated under different scenarios. By virtual of modern solid-state characterization techniques and computer programs, fast rotations of molecular components in several Metal-Organic Frameworks and molecular crystals have been identified. Such knowledge is necessary to further explore emergent properties in crystalline materials and complex molecular machine functions. Chapter One is introduction of polarizable amphidynamic crystals, characterization methods, mechanisms and applications. Chapter Two describes an investigation of an open-pore Zn Metal-Organic Frameworks featuring difluorophenylene dipole and triptycene dicarboxylic acid. After discovering that the Zn MOF cannot maintain its structure upon removal of guest molecules, we sought to explore another more stable MOF system. Chapter Three describes an air-stable interpenetrated zirconium MOFs with dipoles. Solid-state NMR data and dielectric data are analyzed in depth to reveal the unique dynamics in such system. To further enhance the dipolar self ordering and simplify the structure, a dinitro derivative is also synthesized the results are recorded. Chapter Four includes the dynamics of a dumb-bell shape tribenzotriquinacene crystalline molecular rotor both experimentally and computationally. Chapter Five describes explorations on amphidynamic MOFs towards different topologies in order to achieve lattice of lower symmetry or frustrated dipolar array.
Download or read book Molecular Machines Design Synthesis and Characterization written by Oumaima Aiboudi and published by . This book was released on 2023* with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Molecular Machines written by T. Ross Kelly and published by Springer Science & Business Media. This book was released on 2005-12-20 with total page 256 pages. Available in PDF, EPUB and Kindle. Book excerpt: The chapters in this volume describe bottom-up strategies and chronicle cutting-edge advances from several of the world’s leading laboratories engaged in the development of molecular machines. The Nobel Prize in Chemistry 2016 was awarded jointly to Jean-Pierre Sauvage, Sir J. Fraser Stoddart and Bernard L. Feringa "for the design and synthesis of molecular machines". Both Jean-Pierre Sauvage and Sir J. Fraser Stoddart have also contributed to this book.
Download or read book Making Crystals by Design written by Dario Braga and published by John Wiley & Sons. This book was released on 2006-12-15 with total page 380 pages. Available in PDF, EPUB and Kindle. Book excerpt: An excellent overview of the manifold aspects of modern crystal engineering. From design and preparation to spectroscopy and applications, this handbook both covers and evaluates all aspects of crystal engineering. Clearly structured, it provides an overview of the current status as seen from its various angles as well as a comparison of different techniques and applications. An essential source of high quality information for everyone working in this booming and interdisciplinary field: spectroscopists, physical and inorganic chemists as well as materials scientists working in nanotechnology and the pharmaceutical industry.
Download or read book Beyond the Molecular Frontier written by National Research Council and published by National Academies Press. This book was released on 2003-03-19 with total page 238 pages. Available in PDF, EPUB and Kindle. Book excerpt: Chemistry and chemical engineering have changed significantly in the last decade. They have broadened their scopeâ€"into biology, nanotechnology, materials science, computation, and advanced methods of process systems engineering and controlâ€"so much that the programs in most chemistry and chemical engineering departments now barely resemble the classical notion of chemistry. Beyond the Molecular Frontier brings together research, discovery, and invention across the entire spectrum of the chemical sciencesâ€"from fundamental, molecular-level chemistry to large-scale chemical processing technology. This reflects the way the field has evolved, the synergy at universities between research and education in chemistry and chemical engineering, and the way chemists and chemical engineers work together in industry. The astonishing developments in science and engineering during the 20th century have made it possible to dream of new goals that might previously have been considered unthinkable. This book identifies the key opportunities and challenges for the chemical sciences, from basic research to societal needs and from terrorism defense to environmental protection, and it looks at the ways in which chemists and chemical engineers can work together to contribute to an improved future.
Download or read book Design Synthesis and Characterization of new Supramolecular Architectures written by Massimo Baroncini and published by Springer. This book was released on 2013-01-02 with total page 90 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis focuses on the bottom-up design, construction and operation of supramolecular systems capable of behaving as devices and machines on the molecular scale, which is a topic of great interest in nanoscience and a fascinating challenge in nanotechnology. In particular, the systems investigated here include: polyviologen dendrimers capable of behaving as hosts and chargestoring devices; molecular machines based on pseudorotaxanes/rotaxanes and operated by photoinduced proton transfer, or photoisomerization reactions; and a simple unimolecular multiplexer/demultiplexer. The systems have been characterized using a variety of techniques including absorption and emission spectra, laser flash photolysis, NMR spectroscopy, electrochemical experiments, stopped flow measurements. This research addresses a large number of open problems in the nanosciences, dealing with a wide range of the most advanced applications of supramolecular systems.
Download or read book Guide to Programs written by National Science Foundation (U.S.) and published by . This book was released on 1989 with total page 120 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Nature of the Mechanical Bond written by Carson J. Bruns and published by John Wiley & Sons. This book was released on 2016-11-07 with total page 788 pages. Available in PDF, EPUB and Kindle. Book excerpt: “The story is told by THE inventor-pioneer-master in the field and is accompanied by amazing illustrations… [it] will become an absolute reference and a best seller in chemistry!” Alberto Credi “… the great opus on the mechanical bond. A most impressive undertaking!” Jean-Marie Lehn Congratulations to co-author J. Fraser Stoddart, a 2016 Nobel Laureate in Chemistry. In molecules, the mechanical bond is not shared between atoms—it is a bond that arises when molecular entities become entangled in space. Just as supermolecules are held together by supramolecular interactions, mechanomolecules, such as catenanes and rotaxanes, are maintained by mechanical bonds. This emergent bond endows mechanomolecules with a whole suite of novel properties relating to both form and function. They hold unlimited promise for countless applications, ranging from their presence in molecular devices and electronics to their involvement in remarkably advanced functional materials. The Nature of the Mechanical Bond is a comprehensive review of much of the contemporary literature on the mechanical bond, accessible to newcomers and veterans alike. Topics covered include: Supramolecular, covalent, and statistical approaches to the formation of entanglements that underpin mechanical bonds in molecules and macromolecules Kinetically and thermodynamically controlled strategies for synthesizing mechanomolecules Chemical topology, molecular architectures, polymers, crystals, and materials with mechanical bonds The stereochemistry of the mechanical bond (mechanostereochemistry), including the novel types of dynamic and static isomerism and chirality that emerge in mechanomolecules Artificial molecular switches and machines based on the large-amplitude translational and rotational motions expressed by suitably designed catenanes and rotaxanes. This contemporary and highly interdisciplinary field is summarized in a visually appealing, image-driven format, with more than 800 illustrations covering both fundamental and applied research. The Nature of the Mechanical Bond is a must-read for everyone, from students to experienced researchers, with an interest in chemistry’s latest and most non-canonical bond. Read the Preface
Download or read book Thinking in Complexity written by Klaus Mainzer and published by Springer Science & Business Media. This book was released on 2013-03-09 with total page 466 pages. Available in PDF, EPUB and Kindle. Book excerpt: This new edition also treats smart materials and artificial life. A new chapter on information and computational dynamics takes up many recent discussions in the community.
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 456 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
Download or read book Introduction to Reticular Chemistry written by Omar M. Yaghi and published by John Wiley & Sons. This book was released on 2019-03-22 with total page 684 pages. Available in PDF, EPUB and Kindle. Book excerpt: A concise introduction to the chemistry and design principles behind important metal-organic frameworks and related porous materials Reticular chemistry has been applied to synthesize new classes of porous materials that are successfully used for myraid applications in areas such as gas separation, catalysis, energy, and electronics. Introduction to Reticular Chemistry gives an unique overview of the principles of the chemistry behind metal-organic frameworks (MOFs), covalent organic frameworks (COFs), and zeolitic imidazolate frameworks (ZIFs). Written by one of the pioneers in the field, this book covers all important aspects of reticular chemistry, including design and synthesis, properties and characterization, as well as current and future applications Designed to be an accessible resource, the book is written in an easy-to-understand style. It includes an extensive bibliography, and offers figures and videos of crystal structures that are available as an electronic supplement. Introduction to Reticular Chemistry: -Describes the underlying principles and design elements for the synthesis of important metal-organic frameworks (MOFs) and related materials -Discusses both real-life and future applications in various fields, such as clean energy and water adsorption -Offers all graphic material on a companion website -Provides first-hand knowledge by Omar Yaghi, one of the pioneers in the field, and his team. Aimed at graduate students in chemistry, structural chemists, inorganic chemists, organic chemists, catalytic chemists, and others, Introduction to Reticular Chemistry is a groundbreaking book that explores the chemistry principles and applications of MOFs, COFs, and ZIFs.
Download or read book Grantline written by and published by . This book was released on 1988 with total page 174 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book COST Forum written by European Cooperation in the Field of Scientific and Technical Research (Organization) and published by Bernan Press(PA). This book was released on 1992 with total page 212 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Bionanotechnology written by David S. Goodsell and published by John Wiley & Sons. This book was released on 2004-04-16 with total page 351 pages. Available in PDF, EPUB and Kindle. Book excerpt: Discussions of the basic structural, nanotechnology, and system engineering principles, as well as an introductory overview of essential concepts and methods in biotechnology, will be included. Text is presented side-by-side with extensive use of high-quality illustrations prepared using cutting edge computer graphics techniques. Includes numerous examples, such applications in genetic engineering. Represents the only available introduction and overview of this interdisciplinary field, merging the physical and biological sciences. Concludes with the authors' expert assessment of the future promise of nanotechnology, from molecular "tinkertoys" to nanomedicine. David Goodsell is author of two trade books, Machinery of Life and Our Molecular Nature, and Arthur Olson is the world's leader in molecular graphics and nano-scale representation.
Download or read book Materials Nanoarchitectonics written by Katsuhiko Ariga and published by Elsevier. This book was released on 2023-12-15 with total page 648 pages. Available in PDF, EPUB and Kindle. Book excerpt: Materials Nanoarchitectonics: From Integrated Molecular Systems to Advanced Devices provides the latest information on the design and molecular manipulation of self-organized hierarchically structured systems using tailor-made nanoscale materials as structural and functional units. The book is organized into three main sections that focus on molecular design of building blocks and hybrid materials, formation of nanostructures, and applications and devices. Bringing together emerging materials, synthetic aspects, nanostructure strategies, and applications, the book aims to support further progress, by offering different perspectives and a strong interdisciplinary approach to this rapidly growing area of innovation. This is an extremely valuable resource for researchers, advanced students, and scientists in industry, with an interest in nanoarchitectonics, nanostructures, and nanomaterials, or across the areas of nanotechnology, chemistry, surface science, polymer science, electrical engineering, physics, chemical engineering, and materials science. Offers a nanoarchitectonic perspective on emerging fields, such as metal-organic frameworks, porous polymer materials, or biomimetic nanostructures Discusses different approaches to utilizing "soft chemistry" as a source for hierarchically organized materials Offers an interdisciplinary approach to the design and construction of integrated chemical nano systems Discusses novel approaches towards the creation of complex multiscale architectures
Download or read book Organic Solid State Chemistry written by Gautam R. Desiraju and published by Elsevier Publishing Company. This book was released on 1987 with total page 580 pages. Available in PDF, EPUB and Kindle. Book excerpt: With the growing recognition that many organic reactions may be conducted easily in the solid state and that organic solids may have unique optical/electronic properties, there has been much interest - in both academia and industry - in the subject of organic solid state chemistry. This book provides, for the first time, a coherent, unified view of the subject. It describes the packing of molecular crystals and how this packing influences chemical reactions in the solid state. It is concerned with various means of studying the chemistry and physics of molecules in constrained environments. Both experimental and theoretical approaches are discussed. Finally, it tackles the question of prediction of crystal packing, or crystal engineering'. The strength of the book lies in the twin approach adopted, namely that both conceptual and comprehensive chapters are present, in almost equal numbers.
