Download or read book Design Synthesis and Properties of Bipyridine capped Oligothiophenes for Directed Energy and Electron Transfer in Molecular Electronic Applications written by and published by . This book was released on 2007 with total page 71 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book End capped Oligothiophene Dimers Incorporating TTF Metal Dithiolene and Spirocentric Cores written by Iain A. Wright and published by . This book was released on 2011 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The field of organic conductors and semiconductors has grown rapidly. The development of devices based on this technology, and the insights it provides into molecular electronics have led it to the forefront of materials research both industrially and academically. Electroactive organic species can have wildly varied properties and take on two main different forms: i. conjugated macromolecules, including polymers and metallopolymers and oligomers thereof; ii. molecular systems, such as small organic molecules and metal complexes with functional ligands. Compared to traditional inorganic materials, semiconducting polymer and oligomer systems have the potential to demonstrate major practical benefits, including tunability, cost effectiveness, ease of manipulation in processing and flexibility. Molecular systems tend to have very well defined electronic characteristics and careful design allows access to highly varied topologies and functionalities. Chapter 1 incorporates a description of band theory and the development of organic semiconducting technologies, particularly those based on oligothiophenes and small molecules, including characterisation and device structures. Chapter 2 describes the synthesis, design and characterisation of oligothiophene precursors for unique tetrathiafulvalene, metal dithiolene, and spirocyclic dimers, the synthesis and properties of which are discussed in chapters 3, 4, and 5 respectively.
Download or read book Synthesis Electronic Delocalization and Applications of Octahedral Bis imino pyridine Group 13 Metal Complexes written by Amela Arnold (Drljevic) and published by . This book was released on 2020 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation discusses the synthesis, characterization and electronic delocalization of bis(imino)pyridine (I2P) complexes of the Group 13 metals Al, Ga and In. This work aims to understand the electronic communication between redox-active ligands bridged by a main group metal and apply this research for storing multiple electrons in nonaqueous redox-flow battery applications. The introduction to this dissertation details the background on redox-active ligands, mixed valency and redox flow batteries. A future outlook on this field is presented. The work presented here has contributed to our understanding of delocalization of charge in organic molecules, and how delocalization is affected by increasing charge, appending electron-donating or withdrawing functional groups or varying the metal bridge. Evidence for a symmetric nonaqueous redox flow battery is presented. In Chapter 2, ligand-based mixed valency is introduced. Water stable organic mixed valence (MV) compounds were prepared by reaction of reduced bis(imino)pyridine ligands (I2P) with the trichloride salts of Al, Ga, and In. Coordination of two tridentate ligands to each ion affords octahedral complexes that are accessible with five ligand charge states: [(I2P0)(I2P−)M]2+, [(I2P−)2M]+, (I2P−)(I2P2−)M, [(I2P2−)2M]−, [(I2P2−)(I2P3−)M]2−, and for M = Al only, [(I2P3−)2M]3−. In solid-state structures the anionic members of the redox series are stabilized by intercalation of Na+ cations within the ligands. The MV members of the redox series, (I2P−)(I2P2−)M and [(I2P2−)(I2P3−)M]2−, show characteristic intervalence transitions, in the near-infrared region between 6800 - 7400 and 7800 - 9000 cm-1, respectively. Cyclic voltammetry (CV), NIR spectroscopic, and X-ray structural studies support the assignment of Class II for compounds [(I2P2−)(I2P3−)M]2− and Class III for M = Al and Ga in (I2P−)(I2P2−)M. All compounds containing a singly reduced I2P− ligand exhibit a sharp, low energy transition in the region 5100 - 5600 cm−1 that corresponds to a [pi]* - [pi]* transition. CV studies demonstrate that the electron transfer events in each of the redox series, Al, Ga, and In span 2.2, 1.4 and 1.2 V, respectively. In Chapter 3, ligand-based mixed valent (MV) complexes of Al(III) incorporating electron donating (ED) and electron withdrawing (EW) substituents on bis(imino)pyridine ligands (I2P) are presented. The MV states (I2P−)(I2P2−)Al and [(I2P2−)(I2P3−)Al]2− prepared containing EW groups are both assigned as Class II/III. The MV states prepared with incorporation of ED functional groups are Class III and Class II/III in the (I2P−)(I2P2−)Al and [(I2P2−)(I2P3−)Al]2− charge states, respectively. The assignments of the delocalized electronic structures were made using cyclic voltammetry (CV), and near infra-red (NIR) spectroscopy. The MV ligand charge states (I2P−)(I2P2−)Al and [(I2P2−)(I2P3−)Al]2− show intervalence charge transfer (IVCT) transitions at 6850-7740 and 7410-9780 cm−1, respectively. Alkali metal cations in solution had no effect on the IVCT bands of [(I2P2−)(I2P3−)Al]2− complexes containing ED -PhNMe2 substituents or EW -PhF5 substituents on the I2P ligands. Localization of charge in [(I2P2−)(I2P3−)Al]2− was observed when -PhOMe substituents are included on the I2P ligands, so that those complexes are Class II/III with K+ and Class III with K:(18-crown-6)+. In Chapter 4, the application of these redox-active octahedral Al(III) complexes as analytes for symmetric nonaqueous redox flow batteries is presented. Redox flow batteries (RFBs) operate by storing electrons on soluble molecular anolytes and catholytes, however large increases in the energy density of RFBs could be achieved if multiple electrons could be stored in each molecular analyte. Others have suggested and employed various transition element - redox active ligands combinations to realize multi-electron storage in anolytes, and a challenge with those efforts has been the analyte's stability over extended charging and discharging of multi-electron cycles. We reported an organoaluminum analyte in which four electrons can be stored on organic ligands, and for which charging and discharging cycles performed in a symmetric nonaqueous RFB configuration remain stable for over 100 cycles at 70% state of charge and 97% Coulombic efficiency. Stability is promoted by the kinetic inertness of the anolyte to trace water in solvents and by the redox stability of the Al(III) ion to the applied current. Proof-of principle experiments performed with an asymmetric NRFB configuration further demonstrate that up to four electrons can be stored in the cell with no degradation of the analyte over multiple cycles that show 96% Coulombic efficiency.
Download or read book Dissertation Abstracts International written by and published by . This book was released on 2008 with total page 902 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Macromolecular Syntheses written by Charles Gilbert Overberger and published by . This book was released on 2002 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is an up-to-date collection of presentations and posters given at a tutorial and workshop sponsored by the Polymer Division of the American Chemical Society. The material included encompasses recent research results, overviews of critical areas and short presentations in the form of posters and preprints. The book is targeted at established workers in the field of fluoropolymers as well as those wishing to develop a quick understanding of current knowledge and trends in this important field.
Download or read book Electronic Processes in Organic Semiconductors written by Anna Köhler and published by John Wiley & Sons. This book was released on 2015-06-08 with total page 436 pages. Available in PDF, EPUB and Kindle. Book excerpt: The first advanced textbook to provide a useful introduction in a brief, coherent and comprehensive way, with a focus on the fundamentals. After having read this book, students will be prepared to understand any of the many multi-authored books available in this field that discuss a particular aspect in more detail, and should also benefit from any of the textbooks in photochemistry or spectroscopy that concentrate on a particular mechanism. Based on a successful and well-proven lecture course given by one of the authors for many years, the book is clearly structured into four sections: electronic structure of organic semiconductors, charged and excited states in organic semiconductors, electronic and optical properties of organic semiconductors, and fundamentals of organic semiconductor devices.
Download or read book OLED Fundamentals written by Daniel J. Gaspar and published by CRC Press. This book was released on 2015-05-15 with total page 474 pages. Available in PDF, EPUB and Kindle. Book excerpt: A Comprehensive Source for Taking on the Next Stage of OLED R&DOLED Fundamentals: Materials, Devices, and Processing of Organic Light-Emitting Diodes brings together key topics across the field of organic light-emitting diodes (OLEDs), from fundamental chemistry and physics to practical materials science and engineering aspects to design and ma
Download or read book Applied Cross Coupling Reactions written by Yasushi Nishihara and published by Springer Science & Business Media. This book was released on 2012-12-14 with total page 247 pages. Available in PDF, EPUB and Kindle. Book excerpt: “Applied Cross-Coupling Reactions” provides students and teachers of advanced organic chemistry with an overview of the history, mechanisms and applications of cross-coupling reactions. Since the discovery of the transition-metal-catalyzed cross-coupling reactions in 1972, numerous synthetic uses and industrial applications have been developed. The mechanistic studies of the cross-coupling reactions have disclosed that three fundamental reactions: oxidative addition, transmetalation, and reductive elimination, are involved in a catalytic cycle. Cross-coupling reactions have allowed us to produce a variety of compounds for industrial purposes, such as natural products, pharmaceuticals, liquid crystals and conjugate polymers for use in electronic devices. Indeed, the Nobel Prize for Chemistry in 2010 was awarded for work on cross-coupling reactions. In this book, the recent trends in cross-coupling reactions are also introduced from the point of view of synthesis design and catalytic activities of transition-metal catalysts.
Download or read book Sulfur Chemistry written by Xuefeng Jiang and published by Springer Nature. This book was released on 2019-08-28 with total page 475 pages. Available in PDF, EPUB and Kindle. Book excerpt: The series Topics in Current Chemistry Collections presents critical reviews from the journal Topics in Current Chemistry organized in topical volumes. The scope of coverage is all areas of chemical science including the interfaces with related disciplines such as biology, medicine and materials science. The goal of each thematic volume is to give the non-specialist reader, whether in academia or industry, a comprehensive insight into an area where new research is emerging which is of interest to a larger scientific audience. Each review within the volume critically surveys one aspect of that topic and places it within the context of the volume as a whole. The most significant developments of the last 5 to 10 years are presented using selected examples to illustrate the principles discussed. The coverage is not intended to be an exhaustive summary of the field or include large quantities of data, but should rather be conceptual, concentrating on the methodological thinking that will allow the non-specialist reader to understand the information presented. Contributions also offer an outlook on potential future developments in the field.
Download or read book Nonlinear Optics written by George I. Stegeman and published by John Wiley & Sons. This book was released on 2012-07-24 with total page 501 pages. Available in PDF, EPUB and Kindle. Book excerpt: Clear, integrated coverage of all aspects of nonlinear optics—phenomena, materials, and devices Coauthored by George Stegeman, one of the most highly respected pioneers of nonlinear optics—with contributions on applications from Robert Stegeman—this book covers nonlinear optics from a combined physics, optics, materials science, and devices perspective. It offers a thoroughly balanced treatment of concepts, nonlinear materials, practical aspects of nonlinear devices, and current application areas. Beginning with the presentation of a simple electron on a spring model—to help readers make the leap from concepts to applications—Nonlinear Optics gives comprehensive explanations of second-order phenomena, derivation of nonlinear susceptibilities, third-order nonlinear effects, multi-wave mixing, scattering, and more. Coverage includes: Nonlinear response of materials at the molecular level Second-order nonlinear devices, their optimization and limitations The physical origins of second- and third-order nonlinearities Typical frequency dispersion of nonlinearities, explained in terms of simple two- and three-level models Ultrafast and ultrahigh intensity processes Practice problems demonstrating the design of such nonlinear devices as frequency doublers and optical oscillators Based on more than twenty years of lectures at the College of Optics and Photonics (CREOL) at the University of Central Florida, Nonlinear Optics introduces all topics from the ground up, making the material easily accessible not only for physicists, but also for chemists and materials scientists, as well as professionals in diverse areas of optics, from laser physics to electrical engineering.
Download or read book Selenium and Tellurium Chemistry written by J. Derek Woollins and published by Springer Science & Business Media. This book was released on 2011-07-28 with total page 326 pages. Available in PDF, EPUB and Kindle. Book excerpt: Our knowledge of the chemistry of selenium and tellurium has seen significant progress in the last few decades. This monograph comprises contributions from leading scientists on the latest research into the synthesis, structure and bonding of novel selenium and tellurium compounds. It provides insight into mechanistic studies of these compounds and describes coordination chemistry involving selenium and tellurium containing ligands. Contributions also describe the theoretical and spectroscopic studies of selenium and tellurium compounds. Additionally, this monograph outlines the applications of selenium and tellurium in biological systems, materials science and as reagents in organic synthesis and shows how these applications have been a fundamental driving force behind the research into the inorganic and organic chemistry these fascinating elements.
Download or read book Organic Electro Optics and Photonics written by Larry R. Dalton and published by Cambridge University Press. This book was released on 2015-07-30 with total page 305 pages. Available in PDF, EPUB and Kindle. Book excerpt: Definitive guide to modern organic electro-optic and photonic technologies, from basic theoretical concepts to practical applications in devices and systems.
Download or read book Nonlinear Optical Materials written by Jerome V. Moloney and published by Springer Science & Business Media. This book was released on 1998-08-13 with total page 270 pages. Available in PDF, EPUB and Kindle. Book excerpt: Mathematical methods play a significant role in the rapidly growing field of nonlinear optical materials. This volume discusses a number of successful or promising contributions. The overall theme of this volume is twofold: (1) the challenges faced in computing and optimizing nonlinear optical material properties; and (2) the exploitation of these properties in important areas of application. These include the design of optical amplifiers and lasers, as well as novel optical switches. Research topics in this volume include how to exploit the magnetooptic effect, how to work with the nonlinear optical response of materials, how to predict laser-induced breakdown in efficient optical devices, and how to handle electron cloud distortion in femtosecond processes.
Download or read book Supramolecular Amphiphiles written by Xi Zhang and published by Royal Society of Chemistry. This book was released on 2017-06-15 with total page 183 pages. Available in PDF, EPUB and Kindle. Book excerpt: An amphiphile is a molecule that contains a hydrophilic part and a hydrophobic part, linked by covalent bonding. Supramolecular amphiphiles (supra-amphiphiles) are amphiphiles linked by non-covalent interactions. As they employ non-covalent interactions, these species demonstrate adaptability and reversibility in conformational transformation, making them one of the most important emerging species in supramolecular chemistry. They have proven important in bridging the gap between molecular architecture and functional assembly. This book is written and edited by the current leaders in the topic and contains a foreword from Professor Jean-Marie Lehn, a father of the supramolecular chemistry field. Bringing together supramolecular chemistry and colloidal and interfacial science, the book provides a detailed and systematic introduction to supramolecular amphiphiles. Chapters explain how to employ non-covalent interactions to fabricate supra-amphiphiles. The book opens with an introduction to the history and development of the field, followed by chapters focussing on each type of interaction, including host-guest interaction, electrostatic interaction, charge-transfer interaction, hydrogen bonding and dynamic covalent bonds. This book will be a valuable resource for students new to this field and experienced researchers wanting to explore the wider context of their work.
Download or read book Nonlinear Optical Properties of Organic Molecules and Crystals V1 written by D.S. Chemla and published by Elsevier. This book was released on 2012-12-02 with total page 497 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nonlinear Optical Properties of Organic Molecules and Crystals, Volume 1 discusses the nonlinear optical effects in organic molecules and crystals, providing a classical distinction between quadratic and cubic processes. This book begins with a general overview of the basic properties of organic matter, followed by a review on the benefits derived from quantum-chemistry-based models and growth and characterization of high quality, bulk organic crystals and waveguided structures. A case study focusing on a specific material, namely urea, which exemplifies a situation in which transparency in the UV region has been purposely traded for nonlinear efficiency is also deliberated. This text concludes with a description of a type of trade-off between the unpredictable orientation of molecules in crystalline media, polarity of liquid-crystalline structures, and dominant electronic contribution to the electro-optic effect. This publication is beneficial to solid-state physicists and chemists concerned with nonlinear optical properties of organic molecules and crystals.
Download or read book Nanoenergy written by Flavio L Souza and published by Springer. This book was released on 2017-08-30 with total page 338 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book discuss the recent advances and future trends of nanoscience in solar energy conversion and storage. This second edition revisits and updates all the previous book chapters, adding the latest advances in the field of Nanoenergy. Four new chapters are included on the principles and fundamentals of artificial photosynthesis using metal transition semiconductors, perovskite solar cells, hydrogen storage and neutralization batteries. More fundamental aspects can be found in this book, increasing the comparison between theory-experimental achievements and latest developments in commercial devices.
Download or read book Polymer Photophysics written by D. Phillips and published by Springer. This book was released on 1985-08-31 with total page 438 pages. Available in PDF, EPUB and Kindle. Book excerpt:
