Solution And Surface Properties Of Helical Rod Like Polyguanidines

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Solution And Surface Properties Of Helical Rod Like Polyguanidines

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Author : Yujie Lu
language : en
Publisher:
Release Date : 2005

Solution And Surface Properties Of Helical Rod Like Polyguanidines written by Yujie Lu and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2005 with categories.

Keywords: gold-polymer nanocomposites, SAMs, Helical polymer.

Solution And Surface Properties Of Helical Rod Like Polyguanidines

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Author :
language : en
Publisher:
Release Date : 2004

Solution And Surface Properties Of Helical Rod Like Polyguanidines written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2004 with categories.

Helical polymers are of increasing interest because of the wide variety of applications for them, which include uses in optical devices, chiral columns for HPLC separations, asymmetric supports for catalysis, components in organic/inorganic hybrid materials and biomimetic application. Polymerization of achiral monomers (with optically inactive catalysts) always yields a racemic mixture of right and left helical senses since the enantiomers are of equal energy. Our research goal is to synthesize polymers with a biased helical sense and investigate their properties, such as chirality and liquid crystallinity. To this end, two kinds of approaches for the preparation of helical polyguanidines have been demonstrated: significant amplification of chirality was observed in polyguanidines containing chiral side chains and the optically active polyguanidines can also be produced from achiral monomers by helix-sense selective catalysts. The chirality of polymer arises from helical conformation of polymer chains with an excess of single screw sense. Furthermore, we investigated a new method of preparing self-assembled monolayers (SAMs) of thiol terminated polyguanidines. These end-capped polymers were prepared through the living polymerization of carbodiimides. The features of living polymerization allow us to functionalize the polymer during the initiation step. Polarization modulation infrared reflection absorption spectroscopy (PM-IRRAS), monitoring the infrared signature peak of polyguanidines at 1649 cm-1, ellipsometry, and contact-angle goniometry were used to detect the formation and properties of these polymeric SAMs on gold surfaces. The gold-polyguanidines nanocomposites have been also prepared by the surface initiated polymerization on gold nanoparticles. Because these polymers possess helical structures reminiscent of polypeptides, these work should allow us to probe chiral interactions and energies on surfaces that are biologically relevant.

Dissertation Abstracts International

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Author :
language : en
Publisher:
Release Date : 2005

Dissertation Abstracts International written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2005 with Dissertations, Academic categories.

Polymer Solutions

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Author : Iwao Teraoka
language : en
Publisher: John Wiley & Sons
Release Date : 2004-04-07

Polymer Solutions written by Iwao Teraoka and has been published by John Wiley & Sons this book supported file pdf, txt, epub, kindle and other format this book has been release on 2004-04-07 with Science categories.

Polymer Solutions: An Introduction to Physical Properties offers a fresh, inclusive approach to teaching the fundamentals of physical polymer science. Students, instructors, and professionals in polymer chemistry, analytical chemistry, organic chemistry, engineering, materials, and textiles will find Iwao Teraoka’s text at once accessible and highly detailed in its treatment of the properties of polymers in the solution phase. Teraoka’s purpose in writing Polymer Solutions is twofold: to familiarize the advanced undergraduate and beginning graduate student with basic concepts, theories, models, and experimental techniques for polymer solutions; and to provide a reference for researchers working in the area of polymer solutions as well as those in charge of chromatographic characterization of polymers. The author’s incorporation of recent advances in the instrumentation of size-exclusion chromatography, the method by which polymers are analyzed, renders the text particularly topical. Subjects discussed include: Real, ideal, Gaussian, semirigid, and branched polymer chains Polymer solutions and thermodynamics Static light scattering of a polymer solution Dynamic light scattering and diffusion of polymers Dynamics of dilute and semidilute polymer solutions Study questions at the end of each chapter not only provide students with the opportunity to test their understanding, but also introduce topics relevant to polymer solutions not included in the main text. With over 250 geometrical model diagrams, Polymer Solutions is a necessary reference for students and for scientists pursuing a broader understanding of polymers.

Polymer Synthesis

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Author :
language : en
Publisher: Springer Science & Business Media
Release Date : 2004-10-08

Polymer Synthesis written by and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2004-10-08 with Technology & Engineering categories.

1. T. Takata, N. Kihara, Y. Furusho: Polyrotaxanes and Polycatenanes: Recent Advances in Syntheses and Applications of Polymers Comprising of Interlocked Structures.- 2. M. Suginome, Y. Ito: Transition Metal-Mediated Polymerization of Isocyanides.- 3. K. Osakada, D. Takeuchi: Coordination Polymerization of Dienes, Allenes and Methylenecycloalkanes.

Hansen Solubility Parameters

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Author : Charles M. Hansen
language : en
Publisher: CRC Press
Release Date : 2007-06-15

Hansen Solubility Parameters written by Charles M. Hansen and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2007-06-15 with Science categories.

Hansen solubility parameters (HSPs) are used to predict molecular affinities, solubility, and solubility-related phenomena. Revised and updated throughout, Hansen Solubility Parameters: A User's Handbook, Second Edition features the three Hansen solubility parameters for over 1200 chemicals and correlations for over 400 materials including p

Polyfluorenes

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Author : Ullrich Scherf
language : en
Publisher: Springer Science & Business Media
Release Date : 2008-07-29

Polyfluorenes written by Ullrich Scherf and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2008-07-29 with Technology & Engineering categories.

With this collection of short review papers we would like to present a broad overview of research on poly?uorenes and related heteroanalogues over the last two decades. The collection begins with papers on the synthesis of po- ?uorenesandrelatedpolyheteroarenes, thenreportsphotophysicalproperties of this class of conjugated polymers both at the ensemble and the single chain level, continues with a discussion of the rich solid state structures of poly?uorenes, and ?nally switches to device applications (e.g. in OLEDs). In addition, two chapters are devoted to de?ned oligo?uorenesas lowmolecular weight model systems forpoly?uorenes and also to degradation studies. We feel that this up-to-date collection will be very helpful to all polymer chemists and physicists, and will also aid graduate students interested in this fascinating and still growing area of research, since such a compact overview is only now available. All articles are presented by leading scientists in their ?elds, insuring state-of-the-art coverage of all relevant aspects. Together with the body of references this volume is meant to assist researchers in the daily lab routine. Moreover, Advances in Polymer Science, as an established series of high quality review papers, represents a very appropriate platform for our project.Wehopethatthisshortcollectionwillbeofgreatvaluebothforbeg- ners and established researchscientists inthe?eldofpoly?uorene research.

Liquid Crystals And Display Technology

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Author : Morteza Sasani Ghamsari
language : en
Publisher: BoD – Books on Demand
Release Date : 2020-10-07

Liquid Crystals And Display Technology written by Morteza Sasani Ghamsari and has been published by BoD – Books on Demand this book supported file pdf, txt, epub, kindle and other format this book has been release on 2020-10-07 with Science categories.

Liquid crystals have attracted scientific attention for potential applications in advanced devices. Display technology is continuously growing and expanding and, as such, this book provides an overview of the most recent advances in liquid crystals and displays. Chapters cover such topics as nematic liquid crystals, active matrix organic light-emitting diodes, and tetradentate platinum(II) emitters, among others.

Chemistry Of Polymeric Metal Chelates

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Author : Gulzhian I. Dzhardimalieva
language : en
Publisher: Springer
Release Date : 2018-02-13

Chemistry Of Polymeric Metal Chelates written by Gulzhian I. Dzhardimalieva and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-02-13 with Technology & Engineering categories.

This book deals with the chemistry of polymeric metal chelates. The main results and the production and chemical structure of polymers with chelate units as well as the specificity of metal complex binding of different structure are presented here. This book also reveals the transformations which components undergo in the course of chelation. Special attention is paid not only to synthetic but also to natural (including living) systems. The usage of polymeric metal chelates and their development are examined. The related research was performed for chelates with chain structure. This book is useful to researchers being active in synthesis and design of macromolecular metal chelates

Solving A 3d Structural Puzzle

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Author : Casper Rønn Hoeck
language : en
Publisher: Springer
Release Date : 2018-11-03

Solving A 3d Structural Puzzle written by Casper Rønn Hoeck and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-11-03 with Science categories.

This book explores how nuclear magnetic resonance (NMR) spectroscopy may be used for spatial structural elucidation of novel compounds from fungal and synthetic sources. Readers will discover the exciting world of NOE (nuclear Overhauser effect), RDC (residual dipolar coupling) and J-coupling constants, both short- and long range. With emphasis on obtaining structural knowledge from these NMR observables, focus is moved from solving a static 3D structure to solving the structural space inhabited by small organic molecules. The book outlines the development and implementation of two Heteronuclear Multiple Bond Correlation-type NMR experiments, and the 3D structural elucidation of multiple known and novel compounds. In addition, a new method of back-calculating RDCs (allowing for more flexible structures to be investigated), and the synthesis and evaluation of novel chiral alignment media for ab initio determination of absolute stereochemistry of small molecules using RDCs are also included. Challenges that 3D structural generation of small compounds face are also covered in this work.