Download or read book Design and Synthesis of Donor Acceptor Conjugated Systems written by Craig Yu and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Molecular Design and Synthesis of a Donor acceptor Polymer written by Nikolaj Klit and published by . This book was released on 2006 with total page 105 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Design and Synthesis of Extended Conjugated Systems written by Shadi Rivadehi and published by . This book was released on 2012 with total page 546 pages. Available in PDF, EPUB and Kindle. Book excerpt: The work contained within this thesis explores the synthetic strategies to several novel conjugated systems derived from porphyrin, NDI and TTF building blocks and their subsequent characterasation. These novel compounds have applicability in studying the factors that govern ET and EnT in interesting redox processes and as sensors. The bulk of research undertaken utilises the easy to prepare porphyrin-dione 44 and TTF 78 as well as tetrabromo NDI 19. Chapter 1 provides an introduction to the motivation for this research. The Chapter also summarises major directions in the fields of porphyrin, NDI and TTF chemistry and defines the significance and role of their properties as well as relevant applications.Chapter 2 explores the synthesis of novel porphyrinogens including oxidation of the porphyrin macrocycle. Core to the strategy is the porphyrin-dione 44. From this dione, porphyrin anhydride 57 and related metallo-porphyrins are synthesised and their physical properties explored. Obtaining porphyrin-lactone 58 as a side product during these reactions led us to synthesis novel lactams 62 and 63. Reaction of porphyrin-lactone 58 with hydrazine-hydrate converts the lactone moiety to an N-aminolactam 62. It also chemically reduces the antipodal pyrrolic moiety in the N-aminolactam, producing the chlorin-like N-aminochlorolactam 63 as well. This lactone-to-lactam replacement does not dramatically change the UV-visible spectroscopic properties of the N-aminolactam 62, however N-aminochlorolactam 63 shows intense Q band at 696 nm, which is larger than that of either of porphyrin-lactone 58 or N-amino-porpholactam 62, and is also shifted to the red region. Chapter 3 investigates the synthesis of novel porphyrin-TTF systems and their metal complexes. A tetrathiafulvalene donor has been annulated to 44 via quinoxaline linkers to form a novel asymmetric dyad 79. Chemical and physical properties are also outlined by utilising different methods such as UV-visible spectroscopy, fluorescence spectroscopy and cyclic voltammetry. These extended [pi]-conjugated molecules absorb light over a wide region of the UV-visible spectrum. Preliminary fluorescence testing of these compounds suggests that electron and/or energy transfer processes take place from the TTF unit as a donor to the porphyrin moiety as an acceptor. Also, cyclic voltametric studies allow the differentiate between the TTF and porphyrin sites with respect to the multiple redox processes occurring within these compounds. X-ray crystallography was used to characterise compound 79, adding to the structural information gained through other characterisation techniques.Chapter 4 investigates the synthesis of a new naphthalene diimide 104, in which a TTF donor has been attached to the naphthalene diimide core via a rigid bridge. The electronic properties of 104 are studied in detail. A strong electronic absorption profile extends far into the visible spectral region, which originates from its inherent electronic donor-acceptor nature. Also, the presence of a strong absorption at 1270 nm upon chemical oxidation, confirms significant [pi]-[pi] interactions in the compound due to aggregation.The work presented in Chapter 5 focused on synthesising of a novel 2,3-dipyrrol-2'-yl-TTF-quinoxaline 123, which is highly selective and sensitive for F- with detection possible by both colorimetric and fluorometric analyses. The target compound 123 was obtained via the direct condensation reaction of 78 with the 2,3-dipyrrol-2'-yl ethanedione 121 in good yield, and then characterized by various methods including X-ray crystallography. The UV-visible spectrum of 123 in DCM shows three strong absorption bands, which change after the addition of fluoride ion. Compound 123 also shows an emission intensity enhancement with slight red shift upon addition of F-, while no significant changes in the spectra of 123 was observed upon addition of AcO-, H2PO4-, Cl-, Br- and HSO4- in the same solvent. Chapter 6 reflects on the work undertaken in Chapters 2-5 and comments on future directions. It also describes some ancillary works to the main themes of this thesis. Synthesis of the NDI-TTF annulated compounds 126 and 127 under mild conditions are detailed, as well as dimer 128, which might have interesting photophysical properties. A new trimer 130 was also synthesised.
Download or read book Conjugated Objects written by Atsushi Nagai and published by CRC Press. This book was released on 2017-09-01 with total page 453 pages. Available in PDF, EPUB and Kindle. Book excerpt: Conjugated Objects: Development, Synthesis, and Application contains 17 chapters written by young researchers and contains current trends in pi-conjugated systems for application in broad research areas such as design of unique pi-conjugation, catalysts, self-assembly, charge transfer complexes, liquid crystals, supramolecules, and nanostructures by using conjugated small and/or macro-objects organically or electrochemically. The book can be used as a textbook of basic learning by undergraduate and graduate students of chemistry, electrical and electronics engineering, and materials science and by supramolecular researchers in nanotechnology and biotechnology.
Download or read book Design Synthesis and Application of Novel Conjugated Materials Part II written by Haichang Zhang and published by Frontiers Media SA. This book was released on 2021-11-09 with total page 70 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Dual Catalytic Systems for Cross Dehydrogenative Coupling Toward Donor acceptor Conjugated Polymer Synthesis written by Liwen Xing and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Donor-acceptor (D-A) conjugated polymers, as one type of organic semiconducting materials, have drawn lots of attention for the application in organic electronics due to their lowered band gaps and high charge mobility. The polymerization based on cross dehydrogenative coupling (CDC) is an atom-economic synthetic method for D-A polymers as it significantly simplifies the overall synthetic routes by applying C-H bond activation during the polymerization. Two different dual catalytic systems – Au/Ag and Pd/Ag for CDC polymerizations were investigated here. Despite both transformations occurring by a similar mechanistic sequence, dramatically different kinetic behaviors and polymerization results were discovered. The Pd/Ag system produced unexpectedly low homocoupling defects and high molecular weight polymers despite the small molecule coupling reaction proceeding inefficiently. Conversely, Au/Ag system produced low molecular weight polymers with lots of homocoupling defects while catalyzing an efficient small molecule coupling reaction. While the findings in this work provide valuable insight for future studies in obtaining high-molecular weight D-A polymers via CDC, these findings could affect the design of substrates in late-stage C−H functionalization.
Download or read book Design Synthesis and Application of Novel Conjugated Materials written by Haichang Zhang and published by Frontiers Media SA. This book was released on 2021-02-11 with total page 126 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Methods for Electrocatalysis written by Inamuddin and published by Springer Nature. This book was released on 2020-01-02 with total page 469 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book explores key parameters, properties and fundamental concepts of electrocatalysis. It also discusses the engineering strategies, current applications in fuel-cells, water-splitting, metal-ion batteries, and fuel generation. This book elucidates entire category viewpoints together with industrial applications. Therefore, all the sections of this book emphasize the recent advances of different types of electrocatalysts, current challenges, and state-of-the-art studies through detailed reviews. This book is the result of commitments by numerous experts in the field from various backgrounds and expertise and appeals to industrialists, researchers, scientists and in addition understudies from various teaches.
Download or read book The Synthesis and Characterisation of Polymeric Donor acceptor Systems written by Robert Kearney and published by . This book was released on 1990 with total page 129 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Sulfur Containing Polymers written by Xing-Hong Zhang and published by John Wiley & Sons. This book was released on 2021-03-23 with total page 482 pages. Available in PDF, EPUB and Kindle. Book excerpt: A must-have resource to the booming field of sulfur-containing polymers Sulfur-Containing Polymers is a state-of-the-art text that offers a synthesis of the various sulfur-containing polymers from low-cost sulfur resources such as elemental sulfur, carbon disulfide (CS2), carbonyl sulfide (COS) and mercaptan. With contributions from noted experts on the topic, the book presents an in-depth understanding of the mechanisms related to the synthesis of sulfur-containing polymers. The book also includes a review of the various types of sulfur-containing polymers, such as: poly(thioester)s, poly(thioether)s and poly(thiocarbonate)s and poly(thiourethane)s with linear or hyperbranched (dendrimer) architectures. The expert authors provide the fundamentals on the structure-property relationship and applications of sulfur-containing polymers. Designed to be beneficial for both research and application-oriented chemists and engineers, the book contains the most recent research and developments of sulfur-containing polymers. This important book: Offers the first comprehensive handbook on the topic Contains state-of-the-art research on synthesis of sulfur containing polymers from low-cost sulfur-containing compounds Examines the synthesis, mechanism, structure properties, and applications of various types of sulful-containing polymers Includes contributions from well-known experts Written for polymer chemists, materials scientists, chemists in industry, biochemists, and chemical engineers, Sulfur-Containing Polymers offers a groundbreaking text to the field with inforamtion on the most recent research.
Download or read book Synthetic Methods for Conjugated Polymer and Carbon Materials written by Mario Leclerc and published by John Wiley & Sons. This book was released on 2017-04-10 with total page 312 pages. Available in PDF, EPUB and Kindle. Book excerpt: A concise and practical overview of the most important modern synthetic aspects of conjugated polymers and carbon materials, including their properties and applications. Well structured, this book summarizes recent achievements, outlines the current state and reviews research trends. As such, a wide variety of polymerization techniques are included on both a strategic as well as a practical level, including Stille, Suzuki , and direct (hetero)arylation polymerizations. Furthermore, it covers various carbon-rich materials, such as graphene and carbon nanotubes, followed by a look at how the different synthetic pathways and strategies influence their final properties, for example, for use in organic electronic devices. The whole is rounded off with a discussion of future technology advances. An essential reference for newcomers as well as experienced researchers in the field.
Download or read book Fullerene Research Advances written by Carl N. Kramer and published by Nova Publishers. This book was released on 2007 with total page 326 pages. Available in PDF, EPUB and Kindle. Book excerpt: Until 1985, the chemical element Carbon was only known to exist in two forms -- diamond and graphite. This changed when Kroto and co-workers discovered an entirely new form of carbon, which became known as C60 or the fullerene molecule. (This discovery later led to their award of the 1996 Nobel Prize in Chemistry.) The original discovery of C60 was in the soot produced from the laser ablation of graphite. Since then, other methods of production have been developed. It is also thought that isolated C60 molecules may be found in stars and interstellar media. It was soon discovered that C60 is not the only ball-like carbon molecule possible (although it is the most stable and the most dominant). The rugby-ball shaped C70 molecule is another possibility. In nanotechnology, the potential applications of carbon nanotubes (formed by combining hexagonal rings of carbon atoms only, rather than hexagons and pentagons as in C60) for very small electronic devices are currently the subject of much activity. This book presents the latest research in this dynamic field.
Download or read book Conjugated Polymer Nanostructures for Energy Conversion and Storage Applications written by Srabanti Ghosh and published by John Wiley & Sons. This book was released on 2021-06-01 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt: A timely overview of fundamental and advanced topics of conjugated polymer nanostructures Conjugated Polymer Nanostructures for Energy Conversion and Storage Applications is a comprehensive reference on conjugated polymers for energy applications. Distinguished academic and editor Srabanti Ghosh offers readers a broad overview of the synthesis, characterization, and energy-related applications of nanostructures based on conjugated polymers. The book includes novel approaches and presents an interdisciplinary perspective rooted in the interfacing of polymer and synthetic chemistry, materials science, organic chemistry, and analytical chemistry. This book provides complete descriptions of conjugated polymer nanostructures and polymer-based hybrid materials for energy conversion, water splitting, and the degradation of organic pollutants. Photovoltaics, solar cells, and energy storage devices such as supercapacitors, lithium ion battery electrodes, and their associated technologies are discussed, as well. Conjugated Polymer Nanostructures for Energy Conversion and Storage Applications covers both the fundamental topics and the most recent advances in this rapidly developing area, including: The design and characterization of conjugated polymer nanostructures, including the template-free and chemical synthesis of polymer nanostructures Conjugated polymer nanostructures for solar energy conversion and environmental protection, including the use of conjugated polymer-based nanocomposites as photocatalysts Conjugated polymer nanostructures for energy storage, including the use of nanocomposites as electrode materials The presentation of different and novel methods of utilizing conjugated polymer nanostructures for energy applications Perfect for materials scientists, polymer chemists, and physical chemists, Conjugated Polymer Nanostructures for Energy Conversion and Storage Applications also belongs on the bookshelves of organic chemists and any other practicing researchers, academics, or professionals whose work touches on these highly versatile and useful structures.
Download or read book Electron Spin Echo Envelope Modulation ESEEM Spectroscopy written by Sergei A. Dikanov and published by CRC Press. This book was released on 1992-07-27 with total page 432 pages. Available in PDF, EPUB and Kindle. Book excerpt: The first volume devoted entirely to Electron Spin Echo Envelope Modulation (ESEEM) Spectroscopy This valuable book provides an introduction and broad survey of topics in ESEEM spectroscopy, including the theory, instrumentation, peculiarities of ESE experiments, and analysis of experimental data with particular emphasis on orientationally disordered systems. Applications of ESEEM spectroscopy to study chemically and biologically important paramagnetic centers in single crystals, amorphous solids, and powders are discussed as well. Electron Spin Echo Envelope Modulation (ESEEM) Spectroscopy will benefit specialists in magnetic resonance spectroscopy, physicists, chemists, and biologists who use magnetic resonance in their research.
Download or read book Organic Polymers written by Arpit Sand and published by BoD – Books on Demand. This book was released on 2020-03-11 with total page 148 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book, Organic Polymers, covers aspects that are of immediate concern to a new entrant to the field of polymers. Taken as a whole, these eight chapters aim to help the readers easily assimilate other specialized and exhaustive treatises on the subject. Topics dealing with the chemistry and technology of polymers are presented in a careful and logical manner so as to provide an easy and enjoyable read. Several examples and analogies are included so to make the main concepts easy to follow and tables and figures are included so that the book can serve, to a limited extent, as a hand book dealing with polysaccharides with different parameters. This book is meant for students studying polysaccharides and those working on graft copolymers and other allied polymer industries but without a formal educational background in organic polymers.
Download or read book Semiconducting Polymers written by Christine Luscombe and published by Royal Society of Chemistry. This book was released on 2016-10-12 with total page 293 pages. Available in PDF, EPUB and Kindle. Book excerpt: Semiconducting polymers are of great interest for applications in electroluminescent devices, solar cells, batteries and diodes. In recent years vast advances have been made in the area of controlled synthesis of semiconducting polymers, specifically polythiophenes. The book is separated into two main sections, the first will introduce the advances made in polymer synthesis, and the second will focus on the microstructure and property analysis that has been enabled because of the recent advances in synthetic strategies. Edited by one of the leaders in the area of polythiophene synthesis, this new book will bring the field up to date with more recent models for understanding semiconducting polymers. The book will be applicable to materials and polymers chemists in industry and academia from postgraduate level upwards.
Download or read book CRC Handbook of Organic Photochemistry and Photobiology Third Edition Two Volume Set written by Axel Griesbeck and published by CRC Press. This book was released on 2019-04-05 with total page 1607 pages. Available in PDF, EPUB and Kindle. Book excerpt: The only combined organic photochemistry and photobiology handbookAs spectroscopic, synthetic and biological tools become more and more sophisticated, photochemistry and photobiology are merging-making interdisciplinary research essential. Following in the footsteps of its bestselling predecessors, the CRC Handbook of Organic Photochemistry and Pho
