Download or read book Aromatic Electron Donor acceptor Interactions in Novel Supramolecular Assemblies written by Joseph James Reczek and published by . This book was released on 2006 with total page 205 pages. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation describes the use of the Dan:Ndi interaction in new systems and environments, expanding the potential and scope for applications of this chemistry. This work specifically focuses on inter-molecular assemblies, with novel molecular designs for solution interactions as well as the group's first exploration of designed solid state and bulk properties.

Download or read book Investigation of solvent effects in aromatic electron donor acceptor interactions written by Mark Stull Cubberley and published by . This book was released on 2000 with total page 356 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Conformational Switching Within Aromatic Electron Donor and Acceptor Supramolecular Architectures written by Cameron David Peebles and published by . This book was released on 2015 with total page 440 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Iverson group has utilized favorable interactions between aromatic units in the development of highly ordered amphiphilic foldamers, two-component liquid crystal assemblies and pseudo-DNA assemblies. The above materials are made by taking advantage of the complementary electrostatic interactions between derivatives of electron-rich 1,5-dialkoxynaphthalene (DAN) and derivatives of electron-deficient 1,4,5,8-naphthalenetetracarboxylic diimide (NDI). This dissertation describes the theme of dynamic conformational switching within the context of aromatic stacking interactions. Specifically, this work focuses on switching between an aromatic electron-rich and aromatic electron-deficient alternating stacking geometry and an aromatic electron-rich self stacking geometry. While much of this work can be partially explained using classical notions of aromatic stacking (Hunter and Sanders), a new theory explaining aromatic stacking interactions (Wheeler and Houk) is highlighted which better explains the conformational switching behavior. Chapter 2 elucidates the aggregated structure of two amphiphilic foldamers that irreversibly undergo thermally induced conformational changes to form self-supporting hydrogels. The thermodynamics and morphologies of the foldamer aggregates are similar to amyloid aggregates, the misfolded state of proteins associated in numerous neurodegenerative diseases. Chapter 3 discusses the synthesis and time dependent polymorphism of four conjugated aromatic monoalkoxynaphthalene-naphthalimide (MAN-NI) dyads. Interestingly, two dyads displayed a NI-NI stacking geometry upon slower evaporation from solution and a NI-MAN stacking geometry upon faster evaporation from solution. Chapter 4 further investigates the properties of MAN-NI dyads and demonstrates one of dyads displays solvatochromic, thermochromic, vapochromic and mechanochromic stimuli responsive behaviors. Using applied external stimuli the dyad is thought to undergo a conformational change from an NI-NI stacking geometry to a NI-MAN stacking geometry. Chapter 5 details initial investigations into MAN-NI polymers for liquid crystal polymers and organic electronic materials. Four polymers were synthesized and characterized and found to display liquid crystal mesophase textures at room temperature. Additionally, the electronic behavior of the polymers suggests they may be useful candidates for optoelectronic applications. Overall, this work sheds considerable light on the ability of aromatic materials to under conformational changes in solution and in the solid state as a consequence of favorable direct, electrostatic interactions between the aromatic units.

Download or read book Current Challenges on Large Supramolecular Assemblies written by Georges Tsoucaris and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 421 pages. Available in PDF, EPUB and Kindle. Book excerpt: The objectives of the ARW were: - identifying areas and highlighting approaches by which large Supramolecular (SM) Assemblies can be synthesised - reviewing and combining methods to characterise and analyse such assemblies. The first part of the ARW is devoted to reviewing synthetic achievements in recent years for several families of SM compounds, and to bringing out principles for crystal structure design, including novel quantum mechanical methods. Synthesis pertains both to the chemical synthesis of components for SM assembly, and to the subsequent assembly process based on complementarity and non-covalent interactions. The elaboration of multiple recognition "algorithms" concurrently employed (for instance, 1t-1t and hydrogen bonds) has recently reached a high degree of sophistication in the sequence: Molecules -7 Supermolecule -7 SM array -7 Crystal or Conglomerate Novel Large Assemblies comprise synthetic entities with molecular weight as high as 15000, and hybrid SM assemblies between synthetic molecules and DNA. Further developments are foreseen at a higher level of organisation, such as between supermolecules or with electromagnetic fields in photochemical processes. Creation of 2D Assemblies is now a powerful tool for creation and study of SM interactions. Moreover, much is to be learned in going from 2D to 3D assemblies in crystal growth and other forms of organisation such as micelles or liquid crystals. On the other hand, crystal engineering based on Molecular Recognition in the Crystal State leads to novel 2D assemblies occurring within predesigned crystal structures (hydrophobic organic clays or nanoporous networks).

Download or read book Aromatic Interactions written by Darren W Johnson and published by Royal Society of Chemistry. This book was released on 2016-11-15 with total page 297 pages. Available in PDF, EPUB and Kindle. Book excerpt: The field of aromatic interactions, the fundamental nature of substituent effects and the identification of contacts between anions and aromatic systems have generated stimulating arguments in recent years. New theoretical frameworks have been developed and tested and aromatic interactions have emerged as potential solutions for varied problems in biology and materials science. This book provides a wide ranging survey of the latest findings and advances surrounding aromatic interactions, stretching from the fundamentals to modern applications in synthesis, biology and materials chemistry. It also discusses computational, experimental and analytical approaches to understanding these interactions, including pi-pi, anion-pi, and cation-pi interactions. Aromatic Interactions: Frontiers in Knowledge and Application is a useful text for advanced students and researchers, and appeals to those working within the fields of supramolecular chemistry, computational chemistry and thermodynamics.

Download or read book Interfacial Supramolecular Assemblies written by Johannes G. Vos and published by Wiley. This book was released on 2003-07-11 with total page 332 pages. Available in PDF, EPUB and Kindle. Book excerpt: Describes the supramolecular properties of molecular assemblies that contain a solid phase, offering an integrated approach to measurement and addressibility. * Offers an integrated approach to measurement and addressibility. * Features case studies describing the major devices developed using this technology. * The prospects for the future of interfacial supramolecular assemblies are considered.

Download or read book The Donor Acceptor Approach to Molecular Interactions written by Viktor Gutmann and published by Springer. This book was released on 1978-04 with total page 304 pages. Available in PDF, EPUB and Kindle. Book excerpt: Recent developments in various areas of chemistry have been decisively influenced by the principles of structure and mechanism and by the ideas of coordination chemistry, in particular by the donor-acceptor approach, A unified view of almost all kinds of molecular forces is provided by quantum mechanics, and for practical purposes have been classified according to model assumptions, namely, dispersion, polarization, electrostatic, and short-range forces. The latter are divided into two- and three-center covalent chemical bonds, metallic bonds, and exchange-repulsion forces. This approach allows statements of principle and systematic analysis. However, quantitative predictions on concrete large systems are virtually impossible, and there are no general rules that account for structural and chemical changes due to intermolecular interactions. Chemists are therefore left with qualitative descriptions in which the changes in electron densities are considered. Such models as the MO theory or the resonance concept unrealistically assume that the nuclei remain in fixed positions. Further difficulties are encountered in the attempted description on the "nature" of the chemical bond, e.g., the forces involved. In order to avoid these difficulties an extension of the donor-acceptor concept, characterized by the comparison between equilibrium structures in different molecular environments, will be presented in this book. In this way, changes in the positions of the nuclei can be taken into account and the question of the nature of the molecular forces is no longer important.

Download or read book Naphthalenediimide and its Congeners written by G Dan Pantos and published by Royal Society of Chemistry. This book was released on 2017-03-20 with total page 359 pages. Available in PDF, EPUB and Kindle. Book excerpt: The past decade has seen significant advances in naphthalenediimide and rylene diimide chemistry. This book discusses the recent advances in this field, and highlights potential and real applications for the molecules. Such applications include organic photovoltaics, anion-slides, DNA binders, and building blocks for complex molecular topologies. Naphthalenediimide and its Congeners is the first book in this rapidly developing area, and will be essential reference material for postdoctoral researchers and postgraduate students. This text will also provide a solid foundation for further development of naphthalenediimide chemistry. Written by leaders in the field, the book includes chapters on the supramolecular chemistry of naphthalenediimide; DNA intercalators; ion transport through membranes; naphthalenediimide based photovoltaics; and rylene dyes, amongst others. Naphthalenediimide and its Congeners is a detailed and in depth resource relevant not only to supramolecular and materials chemists, but also to the larger chemistry and materials science fields.

Download or read book Supramolecular Assemblies Based on Electrostatic Interactions written by M. Ali Aboudzadeh and published by Springer Nature. This book was released on 2022-05-21 with total page 404 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume presents recent advances and current knowledge in the field of supramolecular assemblies based on electrostatic interactions. The flexibility and simplicity of constructing assemblies is explained via several examples, illustrations, figures, case studies, and historical perspectives. Moreover, as there is an increasing demand for the use of theoretical and computational models of the interaction strengths for assisting with the experimental studies, one chapter specifically focuses on the "modelling'' of supramolecular assemblies. Finally, various aspects of the recent advances of the field as well as potential future opportunities are discussed, with the goal being to stimulate critical discussions among the community and to encourage further discovery. This volume aims to inspire and guide fellow scientists and students working in this field and thus it provides a great tool for all researchers, graduates and professionals specializing on the topic.

Download or read book J aggregates written by Takayoshi Kobayashi and published by World Scientific. This book was released on 2012 with total page 529 pages. Available in PDF, EPUB and Kindle. Book excerpt: This work deals with J-aggregates, which have a long history of research. The volume covers electronic states, linear and nonlinear optical properties. Various properties and processes of J-aggregates, such as super-radiance, excitons, photon echo, geometrical structure, electron transfer and femtosecond spectroscopy, are discussed.

Download or read book Macrocyclic and Supramolecular Chemistry written by Reed M. Izatt and published by John Wiley & Sons. This book was released on 2016-08-01 with total page 501 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book commemorates the 25th anniversary of the International Izatt-Christensen Award in Macrocyclic and Supramolecular Chemistry. The award, one of the most prestigious of small awards in chemistry, recognizes excellence in the developing field of macrocyclic and supramolecular chemistry Macrocyclic and Supramolecular Chemistry: How Izatt-Christensen Award Winners Shaped the Field features chapters written by the award recipients who provide unique perspectives on the spectacular growth in these expanding and vibrant fields of chemistry over the past half century, and on the role of these awardees in shaping this growth. During this time there has been an upsurge of interest in the design, synthesis and characterization of increasingly more complex macrocyclic ligands and in the application of this knowledge to understanding molecular recognition processes in host-guest chemistry in ways that were scarcely envisioned decades earlier. In October 2016, Professor Jean-Pierre Sauvage and Sir J. Fraser Stoddart (author for chapter 22 "Contractile and Extensile Molecular Systems: Towards Molecular Muscles" by Jean -Pierre Sauvage, Vincent Duplan, and Frédéric Niess and 20 "Serendipity" by Paul R. McGonigal and J. Fraser Stoddart respectively) were awarded the Nobel Prize in Chemistry alongside fellow Wiley author Bernard Feringa, for the design and synthesis of molecular machines.

Download or read book J aggregates Volume 2 written by Takayoshi Kobayashi and published by World Scientific. This book was released on 2012-03-23 with total page 529 pages. Available in PDF, EPUB and Kindle. Book excerpt: This work deals with J-aggregates, which have a long history of research. The volume covers electronic states, linear and nonlinear optical properties. Various properties and processes of J-aggregates, such as super-radiance, excitons, photon echo, geometrical structure, electron transfer and femtosecond spectroscopy, are discussed.

Download or read book Polyoxometalate Chemistry for Nano Composite Design written by Toshihiro Yamase and published by Springer Science & Business Media. This book was released on 2006-04-28 with total page 232 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Chemists from several international polyoxometalate research groups discussed recent results, including: controlled self-organization processes for the preparation of nano-composites; electronic interactions in magnetic mixed-valence cryptands and coronands; synthesis of the novel polyoxometalates with topological or biological significance; systematic investigations in acid-base and/or redox catalysis for organic transformations; and electronic properties in materials science."--Page v

Download or read book Synthesis of Electron Donor acceptor Substituted Aromatic Polyamides written by Wei Zhang and published by . This book was released on 1992 with total page 184 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Supramolecular Chemistry written by Jonathan W. Steed and published by Wiley. This book was released on 2009-01-09 with total page 990 pages. Available in PDF, EPUB and Kindle. Book excerpt: Supramolecular chemistry is ‘chemistry beyond the molecule’ - the chemistry of molecular assemblies and intermolecular bonds. It is one of today’s fastest growing disciplines, crossing a range of subjects from biological chemistry to materials science; and from synthesis to spectroscopy. Supramolecular Chemistry is an up-to-date, integrated textbook that tells the newcomer to the field everything they need to know to get started. Assuming little in the way of prior knowledge, the book covers the concepts behind the subject, its breadth, applications and the latest contemporary thinking in the area. It also includes coverage of the more important experimental and instrumental techniques needed by supramolecular chemists. The book has been thoroughly updated for this second edition. In addition to the strengths of the very popular first edition, this comprehensive new version expands coverage into a broad range of emerging areas. Clear explanations of both fundamental and nascent concepts are supplemented by up-to-date coverage of exciting emerging trends in the literature. Numerous examples and problems are included throughout the book. A system of “key references” allows rapid access to the secondary literature, and of course comprehensive primary literature citations are provided. A selection of the topics covered is listed below. Cation, anion, ion-pair and molecular host-guest chemistry Crystal engineering Topological entanglement Clathrates Self-assembly Molecular devices Dendrimers Supramolecular polymers Microfabrication Nanoparticles Chemical emergence Metal-organic frameworks Gels Ionic liquids Supramolecular catalysis Molecular electronics Polymorphism Gas sorption Anion-pinteractions Nanochemistry Supramolecular Chemistry is a must for both students new to the field and for experienced researchers wanting to explore the origins and wider context of their work. Review: "At just under 1000 pages, the second edition of Steed and Atwood's Supramolecular Chemistry is the most comprehensive overview of the area available in textbook form...highly recommended." Chemistry World, August 2009

Download or read book Interface Engineering in Organic Field Effect Transistors written by Xuefeng Guo and published by John Wiley & Sons. This book was released on 2023-07-05 with total page 277 pages. Available in PDF, EPUB and Kindle. Book excerpt: Interface Engineering in Organic Field-Effect Transistors Systematic summary of advances in developing effective methodologies of interface engineering in organic field-effect transistors, from models to experimental techniques Interface Engineering in Organic Field-Effect Transistors covers the state of the art in organic field-effect transistors and reviews charge transport at the interfaces, device design concepts, and device fabrication processes, and gives an outlook on the development of future optoelectronic devices. This book starts with an overview of the commonly adopted methods to obtain various semiconductor/semiconductor interfaces and charge transport mechanisms at these heterogeneous interfaces. Then, it covers the modification at the semiconductor/electrode interfaces, through which to tune the work function of electrodes as well as reveal charge injection mechanisms at the interfaces. Charge transport physics at the semiconductor/dielectric interface is discussed in detail. The book describes the remarkable effect of SAM modification on the semiconductor film morphology and thus the electrical performance. In particular, valuable analyses of charge trapping/detrapping engineering at the interface to realize new functions are summarized. Finally, the sensing mechanisms that occur at the semiconductor/environment interfaces of OFETs and the unique detection methods capable of interfacing organic electronics with biology are discussed. Specific sample topics covered in Interface Engineering in Organic Field-Effect Transistors include: Noncovalent modification methods, charge insertion layer at the electrode surface, dielectric surface passivation methods, and covalent modification methods Charge transport mechanism in bulk semiconductors, influence of additives on materials’ nucleation and morphology, solvent additives, and nucleation agents Nanoconfinement effect, enhancing the performance through semiconductor heterojunctions, planar bilayer heterostructure, ambipolar charge-transfer complex, and supramolecular arrangement of heterojunctions Dielectric effect in OFETs, dielectric modification to tune semiconductor morphology, surface energy control, microstructure design, solution shearing, eliminating interfacial traps, and SAM/SiO2 dielectrics A timely resource providing the latest developments in the field and emphasizing new insights for building reliable organic electronic devices, Interface Engineering in Organic Field-Effect Transistors is essential for researchers, scientists, and other interface-related professionals in the fields of organic electronics, nanoelectronics, surface science, solar cells, and sensors.

Download or read book Porphyrin based Supramolecular Architectures written by Shengqian Ma and published by Royal Society of Chemistry. This book was released on 2021-12-03 with total page 384 pages. Available in PDF, EPUB and Kindle. Book excerpt: Porphyrin-based Supramolecular Architectures focuses on the most recent developments in the field, emphasizing the cutting-edge research in a diverse range of applications. Designed for readers considering the unprecedented prosperity of porous materials research, chapters will cover both strategies for structure design (such as MOFs and COFs) as well as emerging applications including CO2 fixation, catalysis and photodynamic therapy. With contributions from global experts, this title will be of interest to graduate students and researchers in supramolecular chemistry, organic chemistry, inorganic chemistry, physical chemistry, organometallic chemistry, solid-state chemistry, catalysis and (porous) materials science.