Download or read book Design Synthesis and Functionalization of Spiro annulated and Boron containing pi conjugated Donor acceptor Molecules and Their Application Studies in Organic Electronics written by 李盼盼 and published by . This book was released on 2021 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Design Synthesis and Functionalization of Organic pi conjugated Donor acceptor Chromophores written by 姚子希 and published by . This book was released on 2019 with total page 133 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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 Conjugated Objects written by Atsushi Nagai and published by CRC Press. This book was released on 2017-09-01 with total page 536 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 Organoboron Functionalized Conjugated Polymers written by Haiyan Li and published by . This book was released on 2010 with total page 204 pages. Available in PDF, EPUB and Kindle. Book excerpt: Thiophene- and fluorene-based polymers represent two important classes of semiconducting materials and their applications in organic light emitting devices, photovoltaics, organic field-effect transistors and chemical sensors have been extensively investigated. Electron-deficient organoboranes provide interesting characteristics including their ability to act as efficient emitters and charge transport materials in optoelectronic devices and as sensory element for nucleophiles. It is desirable to bring together these two classes of building blocks within one system to form a variety of materials with advantageous properties. We have explored two alternative design principles: (i) the embedding of boron into the conjugated polymer main chain and (ii) the direct attachment of boron as a side group to the conjugated polymer backbone. Three different projects were pursued in this general area: 1. The reactive polymer scaffold poly(fluorenylene(bromo)borane) (PFBBr) with alternating fluorene and borane moieties was prepared via B-Sn exchange reaction. Starting from PFBBr as a universal precursor, we obtained a series of polymers for which we can tune the stability, thermal characteristics, and fluorescence behavior by simple post-polymerization modification reactions. By using the same synthetic strategy, we have also prepared a main chain donor-acceptor type polymer based on a combination of fluorene and triphenylamine. As expected for an ambipolar system, this polymer exhibits a remarkable solvatochromic effect in the emission and can be oxidized and reduced electrochemically at moderate potentials. 2. In an alternative approach, a series of polythiophenes with diarylboryl functional groups attached at the lateral positions have been developed in our group by Anand Sundararaman via a post-polymerization borylation route. The electrical and structural properties of the polymer and the chemical stability can be further tuned by variation of the aryl groups on boron, for which the redox active ferrocenyl and sterically bulky Mes or Tip groups were introduced. To further investigate how the main chain chemical structure influences the optoelectronic properties of this type of polymers, we have prepared a class of bis(dimesitylboryl)bithiophene-based alternating copolymers, involving different aromatic systems such as fluorene, carbazole and triphenylamine derivatives. 3. Organoboron quinolate chelates are promising as light emitting materials because of their high thermal stability and efficient luminescence. We have prepared two new polymers with both the quinolate ligands and boron centers embedded in the main chain. The polymers were obtained by a simple one-step procedure that involves metal-free boron-induced ether cleavage reactions. All the polymers have been characterized by multinuclear NMR spectroscopy, gel permeation chromatography (GPC) and their thermal behavior has been studied by differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA). Their photophysical and electrochemical properties and electronic structures have been investigated by UV-vis absorption and fluorescence spectroscopy, cyclic voltammetry and theoretical calculations for the respective model systems. The tri-coordinate organoboron compounds that were prepared are promising sensory materials and their response towards different anions has been evaluated by UV-vis absorption and fluorescence spectroscopy.
Download or read book Synthesis of Functionalized Organoboron Compounds Through Copper I Catalysis written by Koji Kubota and published by Springer. This book was released on 2017-07-07 with total page 213 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book describes state-of-the-art borylation chemistry using copper(I) catalysis. Enantioselective reactions are included to afford a variety of functionalized, complex organoboronate esters, which will find wide application in asymmetric synthesis, drug discovery, and material science. Organoboron compounds are recognized as useful reagents in organic synthesis; therefore, great effort has been devoted to the development of a simple, mild, and efficient method for their preparation in the past several years. However, the synthesis of functionalized organoboron compounds remains a challenging issue because known reactions often require the use of highly reactive organometallic carbon nucleophiles. This book focuses on conceptually new, formal nucleophilic copper(I)-catalyzed borylation reactions with diboron compounds that show high selectivity and excellent functional group compatibility. Theoretical studies based on density functional theory calculations to understand the reaction mechanisms have also been described. Advances in this novel borylation chemistry will allow the rapid and efficient synthesis of complex molecules with potentially interesting properties in combination with the boron functionalization process.
Download or read book Functionalized Organoboron Polymers and Supramolecular Structures of Pentafluorophenylcopper written by Ami P. Doshi and published by . This book was released on 2010 with total page 317 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis is divided into four different parts. The first three chapters discuss the development of synthetic routes to new boron containing polymers for their potential use as supported borane reagents (Ch. 1.) and photoluminescent materials (Ch. 2. and Ch. 3.). The last chapter (Ch. 4.) discusses the formation of supramolecular structures of pentafluorophenylcopper upon complexation with pyridine nucleophiles and electron rich aromatic pi-systems. The individual research projects are briefly summarized in the following. Ch. 1. The functionalization of synthetic polymers with organoborane moieties has been extensively studied for applications as supported catalysts, sensors, stimuli responsive polymers, flame retardants, preceramic materials, and as intermediates for the preparation of other functional organic polymers. A polystyrene derivative in which the para-positions of the phenyl rings are selectively functionalized with BH2 moieties (PS-BH2) has been prepared from poly(4-trimethylsilyl styrene). The polymer was successfully isolated in the form of its polymeric acid-base complexes PS-BH2·D (D = tBuPy, PPh2Me). The selective and nearly quantitative placement of the BH2 functionalities was confirmed by multinuclear NMR spectroscopy and IR spectroscopy. Their thermal properties were studied by differential scanning calorimetry and thermogravimetric analysis. Ch. 2. Boron containing water soluble polymers could find a variety of applications as polyelectrolytes, for anion recognition in aqueous media and in various biological fields. We have previously shown that polystyrene based side chain functionalized triarylborane polymers can be employed as sensors for the recognition of cyanide and fluoride in organic media. Here we have persued the synthesis of polystyrene that bears Lewis acidic boron centers and dimethylamino-functionalized mesityl groups in the side chain. Attachment of these mesityl groups to the boron center has been realized by the use of boron-silicon exchange, followed by the replacement of the bromine on boron by suitable Grignard reagents. The polymers and model compounds show interesting photophysical properties and have the potential to be applied for anion sensing in aqueous media. Ch. 3. Main chain organoboron conjugated polymers have been established as an important class of materials due to their unusual optoelectronic properties. This behavior arises as a result of overlap between the empty p-orbital on boron and the conjugated pi-system. The hydroboration polymerization and in situ Grignard synthesis have been employed for the preparation of such polymers. Here we have synthesized boron-functionalized distyryl monomers, which can be polymerized via ADMET polymerization. All monomers and ADMET products were characterized by multinuclear NMR spectroscopy. Moderate to high molecular weights in the range of 5,000-10,000 have been obtained. Photophysical data show that polymer emits in the blue-green region. Ch. 4. Treatment of organocopper species with strongly coordinating ligands is known to lead to break-down of the aggregated structures. One such example is the 1:1 complex of pentafluorophenylcopper with pyridine. The monomeric pyridine adduct shows an intriguing supramolecular structure governed by cuprophilic interactions. This complex was also found to display strong blue luminescence in the solid state at room temperature. To further examine the structural and photophysical properties of this new class of complexes, the pentafluorophenylcopper tetramer was treated with different substituted pyridine ligands. The coordination of these ligands to copper was confirmed by 1H, 19F, 13C NMR spectroscopy, x-ray crystallography and elemental analysis. Treatment of pentafluorophenylcopper with pi-bases such as bithiophene, naphthalene anthracene or pyrene lead to novel luminescent supramolecular structures that feature the intact organocopper aggregate as the building block. Formation of bis-adducts with two equivalents of arenes was realized and the formation of sandwich-like structures of the intact tetramer and the corresponding arene was observed via single crystal x-ray analyses. Interestingly, the 1:1 complexes form extended binary stacks in the solid state, where the intact tetramer alternates with the arene.
Download or read book Design Synthesis and Functionalization of Luminescent Alkynyl Compounds of Boron III and Gold III with Bidentate and Tetradentate Ligands written by 黃耀榮 and published by . This book was released on 2016 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Structure properties Relationships in Small Pi conjugated Molecules written by Yue Jiang and published by . This book was released on 2015 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This work deals with the design, synthesis and evaluation of molecular pi-conjugated systems as active materials for (opto)electronics devices. A short first chapter describes three X-shaped oligothiophenes, thecharacterization of their structure and properties and a first evaluation of their performances in electrochromic devices. The second chapter describes the synthesis of molecular acceptors based on a benzodithiophene and the analysis of their potentialities when combined with molecular donors in organic solar cells.The major part of the work is focused on the analysis of structure-properties relationships of a series of smallpush-pull molecules involving di- or tri-arylamine donorblocks linked to an acceptor group by a thienyl bridge. In a first step, a phenyl ring of triphenylamine (TPA) is replaced by p-fluorophenyl, anthryl and naphtyl groups.Optical and electrochemical results show that substitution has little effect at the molecular level but can markedly affect solid-state properties with in particular an improvement of charge-transport and short-circuit current density of solar cells based on these donor materials.In a second step, a phenyl ring of TPA is replaced by alkyl, perfluoroalkyl and oligo(oxyethylene) chains. Results of X-ray diffraction, absorption and photoluminescence spectroscopies, second harmonic generation, and electrochemistry demonstrate that some of these molecules under go aggregation controlled photoluminescence emission wave length while the corresponding materials spontaneous lyre organize in the solid-state to form either H or Jaggregates with enhanced charge mobility, photovoltaic conversion efficiency and mechanically-induced chromism, fluorochromism and NLO-chromism.
Download or read book Functionalized Conjugated Polymers Promoted High Performance Materials for Organic Electronic Devices written by Wei-Yao Tung and published by . This book was released on 2021 with total page 351 pages. Available in PDF, EPUB and Kindle. Book excerpt: Conjugated polymers, representing a new generation of semiconductors, have attracted tremendous attention in the past few decades attributed to their conspicuous properties, such as flexibility, light weight, stretchability and solution processability, which is promising for manufacturing low-cost, large-area, and flexible electronic devices. Moreover, performance of semiconducting behaviors could be readily modulated via manipulating chemical structure and morphology. Organic field-effect transistors (OFETs) are the elemental components in electrical circuits. Although considerable materials were synthesized and investigated, there are still numerous approaches either in novel materials or morphological control which have not been explored. Therefore, in this research, five different strategies were proposed to attain conjugated polymer-based higher performance materials for OFETs, including novel pigment monomers, polymerization method and morphological manipulation by hydrogen bonding and conjugated cross-linking. In Part I, a blue/violet pigment, benzimidazolone-dioxazine-based molecule, was employed into donor−acceptor based conjugated polymers. Through the molecular modulation, the donors with matched size for donor-acceptor packing in the conjugated polymer thin films were uncovered, revealing refined charge carrier mobilities owing to the extended conjugated length of benzimidazolone-dioxazine structure. Part II discloses the diketopyrrolopyrrole(DPP)-quaterthiophene-based donor-acceptor copolymers with latent hydrogen bonding isoindigo-bithiophene to amend the charge transport in amorphous phase via hydrogen bonding-induced aggregation after thermal treatment. Part III applied the robust hydrogen bonding interaction to directly patterning conjugated polymer thin films and their OFETs with exceptional balance of mobilities and resolution of patterns, which is compatible with conventional photolithography in integrated circuit. Part IV introduces a newfangled method to obtain conjugated polymers with controlled molecular weight in the solid state, consisting of conventional anionic-polymerization and topochemical reaction. Moreover, this strategy could be further utilized to prepare the high-performance semiconducting material, graphene nanoribbons. Part V coalesced the concepts of Part II and IV to construct conjugated cross-linking between polymer backbones through topochemical reactions on diketopyrrolopyrrole(DPP)-quaterthiophene-based copolymers with latent cross-linkable diacetylene-bithiophene moieties, ameliorating the charge transport without demolishing the favorable packing of donor-acceptor conjugated polymers.
Download or read book Emissive Materials Nanomaterials written by Akihiro Abe and published by Springer. This book was released on 2010-11-18 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Artificial Metalloenzymes and MetalloDNAzymes in Catalysis written by Montserrat Diéguez and published by John Wiley & Sons. This book was released on 2018-02-21 with total page 431 pages. Available in PDF, EPUB and Kindle. Book excerpt: An important reference for researchers in the field of metal-enzyme hybrid catalysis Artificial Metalloenzymes and MetalloDNAzymes in Catalysis offers a comprehensive review of the most current strategies, developed over recent decades, for the design, synthesis, and optimization of these hybrid catalysts as well as material about their application. The contributors—noted experts in the field—present information on the preparation, characterization, and optimization of artificial metalloenzymes in a timely and authoritative manner. The authors present a thorough examination of this interesting new platform for catalysis that combines the excellent selective recognition/binding properties of enzymes with transition metal catalysts. The text includes information on the various applications of metal-enzyme hybrid catalysts for novel reactions, offers insights into the latest advances in the field, and contains an informative perspective on the future: Explores the development of artificial metalloenzymes, the modern and strongly evolving research field on the verge of industrial application Contains a comprehensive reference to the research area of metal-enzyme hybrid catalysis that has experienced tremendous growth in recent years Includes contributions from leading researchers in the field Shows how this new catalysis combines the selective recognition/binding properties of enzymes with transition metal catalysts Written for catalytic chemists, bioinorganic chemists, biochemists, and organic chemists, Artificial Metalloenzymes and MetalloDNAzymes in Catalysis offers a unique reference to the fundamentals, concepts, applications, and the most recent developments for more efficient and sustainable synthesis.
Download or read book Progress in the Science of Functional Dyes written by Yousuke Ooyama and published by Springer Nature. This book was released on 2021-04-27 with total page 597 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book covers a wide range of topics related to functional dyes, from synthesis and functionality to application. Making a survey of recent progress in functional dye chemistry, it provides an opportunity not only to understand the structure-property relationships of a variety of functional dyes but also to know how they are applied in practical use, from electronic devices to biochemical analyses. From classic dyes such as cyanines, squaraines, porphyrins, phthalocyanines, and others to the newest functional π-conjugation systems, various types of functional dyes are dealt with extensively in the book, focusing especially on the state of the art and the future. Readers will benefit greatly from the scientific context in which organic dyes and pigments are comprehensively explained on the basis of chemistry.
Download or read book Chemical Science of Electron Systems written by Takeshi Akasaka and published by Springer. This book was released on 2015-11-05 with total page 765 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents the most advanced review available of all aspects of π-electron systems, including novel structures, new synthetic protocols, chemical and physical properties, spectroscopic and computational insights, molecular engineering, device properties and physiological properties. π-Electron systems are ubiquitous in nature. Plants convert light energy into chemical energy by photosynthetic processes, in which chlorophylls and other porphyrinoids play an important role. On the one hand, research to learn about photosynthesis from nature has led to understanding of electron and energy transfer processes and to achieving artificial energy conversion systems inspired by nature. On the other hand, recent advances in organic and inorganic chemistry make it possible to construct novel π-electron systems that had never existed in nature. The authors of this book are from a variety of research fields including organic chemistry, inorganic chemistry, physical chemistry, materials science, and biology, providing a comprehensive overview of π-electron systems for a broad readership. Not only specialists but also graduate students working in π-electron systems will find the book of great interest. Throughout, the diverse potential for future fruitful applications of π-electron systems is revealed to the reader.
Download or read book Azoles written by Aleksey Kuznetsov and published by BoD – Books on Demand. This book was released on 2021-06-30 with total page 148 pages. Available in PDF, EPUB and Kindle. Book excerpt: Azoles are a broad and promising class of five-membered heterocyclic compounds containing from one up to five nitrogen atom(s) that can also contain sulfur or oxygen atoms. Widely used as potent antifungal agents, various azole derivatives have also demonstrated many other promising biological properties. This book covers studies of several types of thiazole-based heterocyclic scaffolds, the development of 4-thiazolidinone and thiazole derivatives with heterocyclic fragments as potential candidates for new drugs against trypanosomiasis, numerous synthetic approaches for the synthesis of 1,2,3-triazoles, the application of N-azole, N,S-azole, and N,O-azole as well as their derivatives as retarders of metallic corrosion, and the integration of azoles in materials used for renewable energy processing and applications and wood treatment.
Download or read book Side Reactions in Organic Synthesis written by Florencio Zaragoza Dörwald and published by John Wiley & Sons. This book was released on 2006-03-06 with total page 389 pages. Available in PDF, EPUB and Kindle. Book excerpt: Most syntheses in the chemical research laboratory fail and usually require several attempts before proceeding satisfactorily. Failed syntheses are not only discouraging and frustrating, but also cost a lot of time and money. Many failures may, however, be avoided by understanding the structure-reactivity relationship of organic compounds. This textbook highlights the competing processes and limitations of the most important reactions used in organic synthesis. By allowing chemists to quickly recognize potential problems this book will help to improve their efficiency and success-rate. A must for every graduate student but also for every chemist in industry and academia. Contents: 1 Organic Synthesis: General Remarks 2 Stereoelectronic Effects and Reactivity 3 The Stability of Organic Compounds 4 Aliphatic Nucleophilic Substitutions: Problematic Electrophiles 5 The Alkylation of Carbanions 6 The Alkylation of Heteroatoms 7 The Acylation of Heteroatoms 8 Palladium-Catalyzed C-C Bond Formation 9 Cyclizations 10 Monofunctionalization of Symmetric Difunctional Substrates
Download or read book Smart Inorganic Polymers written by Evamarie Hey-Hawkins and published by John Wiley & Sons. This book was released on 2019-02-07 with total page 421 pages. Available in PDF, EPUB and Kindle. Book excerpt: Provides complete and undiluted knowledge on making inorganic polymers functional. This comprehensive book reflects the state of the art in the field of inorganic polymers, based on research conducted by a number of internationally leading research groups working in this area. It covers the synthesis aspects of synthetic inorganic polymers and looks at multiple inorganic monomers as building blocks, which exhibit unprecedented electronic, redox, photo-emissive, magnetic, self-healing and catalytic properties. It also looks at the applications of inorganic polymers in areas such as optoelectronics, energy storage, industrial chemistry, and biology. Beginning with an overview of the use of smart inorganic polymers in daily life, Smart Inorganic Polymers: Synthesis, Properties and Emerging Applications in Materials and Life Sciences goes on to study the synthesis, properties, and applications of polymers incorporating different heteroelements such as boron, phosphorus, silicon, germanium, and tin. The book also examines inorganic polymers in flame-retardants, as functional materials, and in biology. An excellent addition to the polymer scientists' and synthetic chemists' toolbox Summarizes the state of the art on how to make and use functional inorganic polymers, from synthesis to applications Edited by the coordinator of a highly funded European community research program (COST action) that focuses specifically on the exploration of inorganic polymers Features contributions from top experts in the field Aimed at academics and industrial researchers in this field, Smart Inorganic Polymers: Synthesis, Properties and Emerging Applications in Materials and Life Sciences will also benefit scientists who want to get a better overview on the state-of-the-art of this rapidly advancing area.
