Wholly Aromatic Ether Imides Potential Materials For N Type Semiconductors

Author : National Aeronautics and Space Administration (NASA)
Publisher : Createspace Independent Publishing Platform
ISBN 13 : 9781721039562
Total Pages : 30 pages
Book Rating : 4.62/5 ( download)

DOWNLOAD NOW!

Download or read book Wholly Aromatic Ether-Imides. Potential Materials for N-Type Semiconductors written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-06-12 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt: We report on the synthesis and characterization of a novel series low-molar-mass ether-imide rod-shaped model compounds. All ether-imides were obtained by terminating the appropriate rigid core dianhydride, i.e. pyromellitic dianhydride (PMDA), 1,4,5,8-naphthalenetetracarboxylic dianhydride (NDA), 3,3',4,4'-biphenyltetracarboxylic dianhydride (BPDA), and 3,3,4,4'-oxydiphthalic dianhydride (ODPA) with three flexible aryl-ether tails of different chain length. The mono-functional aryl-ether amines, i.e. 4-(3-phenoxy-phenoxy)-phenylamine (2) and 4-(3-phenoxy-3-phenoxy-phenoxy)-phenylamine (4), were synthesized using standard fluoro-displacement and Ullmann condensation techniques. The corresponding ether-imide model compounds were obtained in high yields using a one-step solution imidization procedure. Increasing the number of meta-substituted aryl-ether units reduces the melt transition temperatures and at the same time it increases the solubility of the model compounds. Most model compounds are crystalline solids and form isotropic melts upon heating. 2,7-Bis-(-4-phenoxy-phenyl)-benzo[Imn][3,8]phenanthroline1,3,6,8-tetraone (NDA-n0), however, displays a smectic A (SA) when cooled from the isotropic phase, followed by what appears to be either a highly ordered smectic phase or a, columnar phase. This is the first example, known to date, in which a mesophase is detected in a wholly aromatic ether-imide compound. For all compounds we present spectroscopic data and X-ray diffraction data. Cyclic voltammetry was used to determine the redox behavior and pertinent energy levels of the model compounds.Dingemans, Theo J. and St.Clair, Terry L. and Samulski, Edward T. and Bushnell, Dennis M. (Technical Monitor)Langley Research CenterETHERS; IMIDES; SYNTHESIS (CHEMISTRY); AROMATIC COMPOUNDS; N-TYPE SEMICONDUCTORS; ANHYDRIDES; SOLUBILITY; X RAY DIFFRACTION; LIQUID CRYSTALS; OXIDATION-REDUCTION REACTIONS; MASS; TRANSITION TEMPERATURE

Author :
Publisher :
ISBN 13 :
Total Pages : 32 pages
Book Rating : 4.27/5 ( download)

DOWNLOAD NOW!

Download or read book Wholly Aromatic Ether-imides. Potential Materials for N-Type Semiconductors written by and published by . This book was released on 2002 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Author :
Publisher :
ISBN 13 :
Total Pages : 1286 pages
Book Rating : 4.86/5 ( download)

DOWNLOAD NOW!

Download or read book NASA Tech Briefs written by and published by . This book was released on 2006 with total page 1286 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Author : American Chemical Society. Committee on Professional Training
Publisher :
ISBN 13 :
Total Pages : 1932 pages
Book Rating : 4.05/5 ( download)

DOWNLOAD NOW!

Download or read book Directory of Graduate Research written by American Chemical Society. Committee on Professional Training and published by . This book was released on 2005 with total page 1932 pages. Available in PDF, EPUB and Kindle. Book excerpt: Faculties, publications and doctoral theses in departments or divisions of chemistry, chemical engineering, biochemistry and pharmaceutical and/or medicinal chemistry at universities in the United States and Canada.

Author : Marc Abadie
Publisher : BoD – Books on Demand
ISBN 13 : 9535108999
Total Pages : 260 pages
Book Rating : 4.93/5 ( download)

DOWNLOAD NOW!

Download or read book High Performance Polymers - Polyimides Based written by Marc Abadie and published by BoD – Books on Demand. This book was released on 2012-12-19 with total page 260 pages. Available in PDF, EPUB and Kindle. Book excerpt: The feature of polyimides and other heterocyclic polymers are now well-established and used for long term temperature durability in the range of 250 - 350'C. This book will review synthesis, mechanisms, ultimate properties, physico-chemical properties, processing and applications of such high performance materials needed in advanced technologies. It presents interdisciplinary papers on the state of knowledge of each topic under consideration through a combination of overviews and original unpublished research. The volume contains eleven chapters divided into three sections: Chemistry; Chemical and Physical Properties; and Applications.

Author : Greg T. Hermanson
Publisher : Academic Press
ISBN 13 : 0080568726
Total Pages : 1233 pages
Book Rating : 4.20/5 ( download)

DOWNLOAD NOW!

Download or read book Bioconjugate Techniques written by Greg T. Hermanson and published by Academic Press. This book was released on 2010-07-26 with total page 1233 pages. Available in PDF, EPUB and Kindle. Book excerpt: Bioconjugate Techniques, 2nd Edition, is the essential guide to the modification and cross linking of biomolecules for use in research, diagnostics, and therapeutics. It provides highly detailed information on the chemistry, reagent systems, and practical applications for creating labeled or conjugate molecules. It also describes dozens of reactions with details on hundreds of commercially available reagents and the use of these reagents for modifying or cross linking peptides and proteins, sugars and polysaccharides, nucleic acids and oligonucleotides, lipids, and synthetic polymers. A one-stop source for proven methods and protocols for synthesizing bioconjugates in the lab Step-by-step presentation makes the book an ideal source for researchers who are less familiar with the synthesis of bioconjugates More than 600 figures that visually describe the complex reactions associated with the synthesis of bioconjugates Includes entirely new chapters on the latest areas in the field of bioconjugation as follows: Microparticles and nanoparticlesSilane coupling agentsDendrimers and dendronsChemoselective ligationQuantum dotsLanthanide chelatesCyanine dyesDiscrete PEG compoundsBuckyballs,fullerenes, and carbon nanotubesMass tags and isotope tagsBioconjugation in the study of protein interactions

Author : Vikas Mittal
Publisher : John Wiley & Sons
ISBN 13 : 1118171942
Total Pages : 454 pages
Book Rating : 4.43/5 ( download)

DOWNLOAD NOW!

Download or read book High Performance Polymers and Engineering Plastics written by Vikas Mittal and published by John Wiley & Sons. This book was released on 2011-09-09 with total page 454 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book describes advances in synthesis, processing, and technology of environmentally friendly polymers generated from renewable resources. With contents based on a wide range of functional monomers and contributions from eminent researchers, this volume demonstrates the design, synthesis, properties and applications of plant oil based polymers, presenting an elaborate review of acid mediated polymerization techniques for the generation of green polymers. Chemical engineers are provided with state-of-the-art information that acts to further progress research in this direction.

Author : Laurence W. McKeen
Publisher : William Andrew
ISBN 13 : 145572551X
Total Pages : 407 pages
Book Rating : 4.19/5 ( download)

DOWNLOAD NOW!

Download or read book Film Properties of Plastics and Elastomers written by Laurence W. McKeen and published by William Andrew. This book was released on 2012-04-25 with total page 407 pages. Available in PDF, EPUB and Kindle. Book excerpt: Preface -- 1. Introduction to Plastics and Polymers -- 2. Chapter 2 - Introduction to the Mechanical, Thermal and Permeation Properties of Plastics and Elastomers -- 3. Production of films -- 4. Markets and Applications for films -- 5. Styrenic Plastics -- 6. Polyesters -- 8. Polyamides (Nylons) -- 9. Polyolefins -- 10. Polyvinyls & Acrylics -- 11. Fluoropolymers -- 12. High Temperature/High Performance Polymers -- 13. Elastomers and rubbers -- 14. Renewable Resource or biodegradable polymers -- Appendices -- Permeation Unit Conversion Factors -- Vapor Transmission rate Conversion factors.

Author : E. Winterfeldt
Publisher : Elsevier
ISBN 13 : 0080912494
Total Pages : 1217 pages
Book Rating : 4.93/5 ( download)

DOWNLOAD NOW!

Download or read book Heteroatom Manipulation written by E. Winterfeldt and published by Elsevier. This book was released on 1992-09-08 with total page 1217 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this volume, those functional groups containing heteroatoms that have gained importance in organic synthesis are dealt with in detail. The introduction of these various groups and their relevant transformations are described and the various aspects of chemoselectivity, regioselectivity and stereoselectivity are discussed. After a compilation of the synthetically most useful substitution processes, there is a series of chapters on the various types of acylation reactions and in this context the different methods of acyl group activation are discussed. As functional group protection is of very general importance for organic synthesis, a corresponding chapter is included. This is followed by a section on the preparation of carbonyl derivatives and the most important transformations and rearrangements of functional group derivatives. At the end of the volume one finds chapters on all types of elimination reactions and related thermal reactions together with a survey on fragmentation processes in organic synthesis.

Author : Sombel Diaham
Publisher : BoD – Books on Demand
ISBN 13 : 1838800972
Total Pages : 336 pages
Book Rating : 4.70/5 ( download)

DOWNLOAD NOW!

Download or read book Polyimide for Electronic and Electrical Engineering Applications written by Sombel Diaham and published by BoD – Books on Demand. This book was released on 2021-05-05 with total page 336 pages. Available in PDF, EPUB and Kindle. Book excerpt: Polyimide is one of the most efficient polymers in many industries for its excellent thermal, electrical, mechanical, and chemical properties as well as its easy processability. In the electronic and electrical engineering industries, polyimide has widely been used for decades thanks to its very good dielectric and insulating properties at the high electric field and at high temperatures of around 200°C in long term-service. Moreover, polyimide appears essential for the development of new electronic devices where further considerations such as high power density, integration, higher temperature, thermal conduction management, energy storage, reliability, or flexibility are required in order to sustain the growing global electrical energy consumption. This book gathers interdisciplinary chapters on polyimide in various topics through state-of-the-art and original ongoing research.