Macromolecular Rapid Communications

Cover image for Vol. 30 Issue 9‐10

Special Issue: Dedicated to the 25th Anniversary of the MPI for Polymer Research, Mainz

May 19, 2009

Volume 30, Issue 9-10

Pages 643–877

Issue edited by: H. W. Spiess

  1. Cover Picture

    1. Top of page
    2. Cover Picture
    3. Contents
    4. Essay
    5. Reviews
    6. Feature Articles
    7. Communications
    8. Frontispiece
    9. Communication
    10. Back Cover
    1. Macromol. Rapid Commun. 9–10/2009

      Yan Lu, Alexander Wittemann and Matthias Ballauff

      Article first published online: 26 MAY 2009 | DOI: 10.1002/marc.200990015

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      Front Cover: Spherical polyelectrolyte brushes (SPBs) can serve as carriers for catalytically active nanostructures, namely for metal nanoparticles and enzymes. In both cases, composite particles present robust systems with excellent colloidal stability against coagulation. Further details can be found in the article by Y. Lu, A. Wittemann, and M. Ballauff* on page 806.

  2. Contents

    1. Top of page
    2. Cover Picture
    3. Contents
    4. Essay
    5. Reviews
    6. Feature Articles
    7. Communications
    8. Frontispiece
    9. Communication
    10. Back Cover
    1. Macromol. Rapid Commun. 9–10/2009 (pages 643–648)

      Article first published online: 26 MAY 2009 | DOI: 10.1002/marc.200990016

  3. Essay

    1. Top of page
    2. Cover Picture
    3. Contents
    4. Essay
    5. Reviews
    6. Feature Articles
    7. Communications
    8. Frontispiece
    9. Communication
    10. Back Cover
  4. Reviews

    1. Top of page
    2. Cover Picture
    3. Contents
    4. Essay
    5. Reviews
    6. Feature Articles
    7. Communications
    8. Frontispiece
    9. Communication
    10. Back Cover
    1. Suzuki Polycondensation: Polyarylenes à la Carte (pages 653–687)

      Junji Sakamoto, Matthias Rehahn, Gerhard Wegner and A. Dieter Schlüter

      Article first published online: 26 MAY 2009 | DOI: 10.1002/marc.200900063

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      Suzuki polycondensation (SPC) celebrates its 20th anniversary this year. Since it was first reported in 1989, this polymerization method has been developed into the most powerful and robust tool for the synthesis of polyarylenes. The present review gives a brief historic perspective and provides a comprehensive insight into this method's use in both academia and industry. Some emphasis is placed on the technological importance SPC has gained over the years.

    2. Recent Advances in Solid-State MAS NMR Methodology for Probing Structure and Dynamics in Polymeric and Supramolecular Systems (pages 688–716)

      Steven P. Brown

      Article first published online: 21 APR 2009 | DOI: 10.1002/marc.200800816

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      Recent applications of novel 1H, 2H, 13C, 15N and 17O solid-state MAS NMR methods that exploit the sensitivity to structure and dynamics of the NMR chemical shift and quadrupolar coupling as well as the through-space dipolar coupling and through-bond J coupling to provide new insight into the structural and dynamic processes that determine the bulk properties of polymeric and supramolecular materials are reviewed.

    3. Organic/Organic′ Heterojunctions: Organic Light Emitting Diodes and Organic Photovoltaic Devices (pages 717–731)

      Neal R. Armstrong, Weining Wang, Dana M. Alloway, Diogenes Placencia, Erin Ratcliff and Michael Brumbach

      Article first published online: 11 MAY 2009 | DOI: 10.1002/marc.200900075

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      We review the technological impact and characterization of O/O′ heterojunctions, which are created from two dissimilar organic thin films, with differing ionization potentials and electron affinities. Offsets in their frontier orbital energies lead to rectification and diode-like electrical responses, and create “contact selectivity” for both organic light emitting diodes (OLEDs) and organic photovoltaics (OPVs). Photoemission spectroscopies are the primary tool for the characterization of these O/O′ heterojunctions, providing for estimates of IP, and HOMO energies, and the characterization of interface dipole effects at the point of molecular contact.

  5. Feature Articles

    1. Top of page
    2. Cover Picture
    3. Contents
    4. Essay
    5. Reviews
    6. Feature Articles
    7. Communications
    8. Frontispiece
    9. Communication
    10. Back Cover
    1. Polymer Brushes for Surface Tuning (pages 732–740)

      Petra Uhlmann, Holger Merlitz, Jens-Uwe Sommer and Manfred Stamm

      Article first published online: 13 MAY 2009 | DOI: 10.1002/marc.200900113

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      Polymer brushes made of one or two linear polymers are a very versatile tools to create functional (active) and switchable surfaces and thin films. The improvement of the understanding of the switching behaviour by computer simulation, the creation of surfaces with switching ultrahydrophobicity and wettability gradients as well as the immobilization of nanoparticles, is demonstrated together with applications in microfluidics and thin film sensors.

    2. Toy amphiphiles on the computer: What can we learn from generic models? (pages 741–751)

      Friederike Schmid

      Article first published online: 16 MAR 2009 | DOI: 10.1002/marc.200800750

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      Natural and artificial amphiphiles are omnipresent in life and technology. The simple trick of covalently linking chemically incompatible units helps to produce numerous self-assembled nanostructures. These are “generic”: They can mostly be understood with simple toy models that neglect chemical details. The approach of generic modeling is reviewed and illustrated with examples.

    3. Mesoscopic Membrane Physics: Concepts, Simulations, and Selected Applications (pages 752–771)

      Markus Deserno

      Article first published online: 15 APR 2009 | DOI: 10.1002/marc.200900090

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      Biomembranes exhibit fascinating physics covering orders of magnitude in length and time scales. Computer simulations within the mesoscopic window require systematically reduced descriptions of lipids and proteins to overcome otherwise insurmountable barriers in computational feasibility. This article illustrates recent advances gained by remarkably simple coarse grained models.

    4. Poly(aryleneethynylene)s (pages 772–805)

      Uwe H. F. Bunz

      Article first published online: 6 MAY 2009 | DOI: 10.1002/marc.200800775

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      Changing color! The fluorescent poly-(aryleneethynylene)s PAEs are valuable functional building blocks for supramolecular assembly and for biosensory applications. Change of environment or exposure to specific analytes lead to significant changes in emission color and intensity, making PAEs premier contenders for sensory applications.

    5. Supramolecular Structures Generated by Spherical Polyelectrolyte Brushes and their Application in Catalysis (pages 806–815)

      Yan Lu, Alexander Wittemann and Matthias Ballauff

      Article first published online: 21 APR 2009 | DOI: 10.1002/marc.200800789

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      Spherical polyelectrolyte brushes (SPB) can be used as carriers for catalytically active nanoparticles or enzymes. The resulting composite particles present robust systems with excellent colloidal stability. Here, we review recent work done on the use of these systems in catalysis.

    6. Fluorene-Based Copolymers Containing Dinaphtho-s-indacene as New Building Blocks for High-Efficiency and Color-Stable Blue LEDs (pages 816–825)

      Xin Guo, Yanxiang Cheng, Zhiyuan Xie, Yanhou Geng, Lixiang Wang, Xiabin Jing and Fosong Wang

      Article first published online: 17 MAR 2009 | DOI: 10.1002/marc.200800765

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      A novel blue dopant (NSI) is incorporated into the backbone of PFO to develop a series of blue light-emitting copolymers based on efficient energy transfer. They show an emission maxima between 440 and 460 nm. The luminance efficiency of 3.43 cd · A−1 with CIE coordinates of (0.152, 0.164) is achieved. These copolymers are promising candidates for highly efficient and color-stable pure blue PLEDs.

    7. Segmental Mobility in the Non-crystalline Regions of Semicrystalline Polymers and its Implications on Melting (pages 826–839)

      Sanjay Rastogi, Yefeng Yao, Dirk R. Lippits, Günther W. H. Höhne, Robert Graf, Hans Wolfgang Spiess and Piet J. Lemstra

      Article first published online: 13 MAY 2009 | DOI: 10.1002/marc.200900025

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      In semicrystalline polymers, melting temperature is strongly influenced by the topological constraints arising due to crystallisation conditions. Crystals of similar thickness show distinctly different melting temperatures due to loose or tight folds residing in the amorphous region of the polymer. Kinetics invoked in the melting behaviour of the tight folded crystals result into a non-equilibrium melt state where the existing rheological concepts cannot be applied.

  6. Communications

    1. Top of page
    2. Cover Picture
    3. Contents
    4. Essay
    5. Reviews
    6. Feature Articles
    7. Communications
    8. Frontispiece
    9. Communication
    10. Back Cover
    1. Polytriarylamines with On-Chain Crystal Violet Moieties (pages 840–844)

      Ines Dumsch, Christof J. Kudla and Ullrich Scherf

      Article first published online: 16 DEC 2008 | DOI: 10.1002/marc.200800557

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      p-Type semiconducting polymer materials with an intrinsic pH sensitivity are attractive for future OFET sensor applications. One promising class of such materials are soluble, alternating copolymers with on-chain triarylmethane dyes that show a strong influence of the ambient pH value on their optical spectra.

    2. Nonfouling Polypeptide Brushes via Surface-initiated Polymerization of Nε-oligo(ethylene glycol)succinate-L-lysine N-carboxyanhydride (pages 845–850)

      Jing Wang, Matthew I. Gibson, Raphaël Barbey, Shou-Jun Xiao and Harm-Anton Klok

      Article first published online: 1 APR 2009 | DOI: 10.1002/marc.200800744

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      Polypeptide-based polymer brushes with oligo(ethylene glycol) side chains have been prepared by the surface-initiated ring-opening polymerization of two novel L-lysine based α-amino acid N-carboxyanhydrides. These surfaces demonstrated excellent resistance to the nonspecific adsorption of two different proteins compared to the unmodified or initiator modified glass surfaces.

    3. Similarities in the Structural Organization of Major and Minor Ampullate Spider Silk (pages 851–857)

      Periklis Papadopoulos, Roxana Ene, Immanuel Weidner and Friedrich Kremer

      Article first published online: 15 APR 2009 | DOI: 10.1002/marc.200900018

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      The manufacture of spider silk remains a challenge in the materials science field. The comparison of two types of silk, major and minor ampullate, reveals that the critical part of the spinning process is the orientation of the molecules and creation of pre-stress in the fiber core.

    4. Patterned Hydrogel Layers Produced by Electrochemically Triggered Polymerization (pages 858–863)

      Johanna Bünsow and Diethelm Johannsmann

      Article first published online: 18 FEB 2009 | DOI: 10.1002/marc.200800718

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      Electrochemically triggered polymerization of N-is opropylacrylamide and oligo (ethylene glycol) methacrylate was carried out in the presence of small oxygen bubbles generated between an insulated counter electrode and the substrate. The polymer was preferentially deposited on the gas/liquid interface which allowed for writing patterns by using the counter electrode as a pen.

    5. Interfacial Excess Free Energies of Solid–Liquid Interfaces by Molecular Dynamics Simulation and Thermodynamic Integration (pages 864–870)

      Frédéric Leroy, Daniel J. V. A. dos Santos and Florian Müller-Plathe

      Article first published online: 16 MAR 2009 | DOI: 10.1002/marc.200800746

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      Solid–liquid interfacial tension is a key quantity to the thermodynamics of systems where a liquid is in the vicinity of a solid substrate. An algorithm is presented that allows computation of that quantity. The algorithm would be useful to determine the change in free energy with respect to a modification of the chemical composition of a solid or a change in the solid surface nanostructure.

  7. Frontispiece

    1. Top of page
    2. Cover Picture
    3. Contents
    4. Essay
    5. Reviews
    6. Feature Articles
    7. Communications
    8. Frontispiece
    9. Communication
    10. Back Cover
    1. Macromol. Rapid Commun. 9–10/2009

      Alena Aulasevich, Robert F. Roskamp, Ulrich Jonas, Bernhard Menges, Jakub Dostálek and Wolfgang Knoll

      Article first published online: 26 MAY 2009 | DOI: 10.1002/marc.200990017

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      Frontispiece: The image shows the implementation of optical waveguide spectroscopy (OWS) for the quantitative time-resolved observation of changes in swelling behavior and mass density of thin hydrogel films. An NIPAAm-based polymer is modified with IgG molecules by using a charge-attraction scheme based on tetrafluoropenol-sulfonate active ester. Further details can be found in the article by A. Aulasevich, R. F. Roskamp, U. Jonas, B. Menges, J. Dostálek,* and W. Knoll on page 872.

  8. Communication

    1. Top of page
    2. Cover Picture
    3. Contents
    4. Essay
    5. Reviews
    6. Feature Articles
    7. Communications
    8. Frontispiece
    9. Communication
    10. Back Cover
    1. Optical Waveguide Spectroscopy for the Investigation of Protein-Functionalized Hydrogel Films (pages 872–877)

      Alena Aulasevich, Robert F. Roskamp, Ulrich Jonas, Bernhard Menges, Jakub Dostálek and Wolfgang Knoll

      Article first published online: 17 MAR 2009 | DOI: 10.1002/marc.200800747

      Thumbnail image of graphical abstract

      Optical waveguide spectroscopy (OWS) is used here for the quantitative observation of changes in the swelling behavior and mass density of protein-functionalized hydrogel films. A thin film of an N-isopropylacrylamide-based polymer that supported optical waveguide modes is attached to a metallic sensor surface and IgG molecules are immobilized in situ. The anti-fouling properties of the functionalized hydrogel network and the kinetics of affinity binding of protein molecules in the gel have been investigated.

  9. Back Cover

    1. Top of page
    2. Cover Picture
    3. Contents
    4. Essay
    5. Reviews
    6. Feature Articles
    7. Communications
    8. Frontispiece
    9. Communication
    10. Back Cover
    1. Macromol. Rapid Commun. 9–10/2009

      Neal R. Armstrong, Weining Wang, Dana M. Alloway, Diogenes Placencia, Erin Ratcliff and Michael Brumbach

      Article first published online: 26 MAY 2009 | DOI: 10.1002/marc.200990018

      Thumbnail image of graphical abstract

      Back Cover: Heterojunctions between two dissimilar organic materials are the active sites for excited state formation in organic light emitting diodes (OLEDs) and excited state dissociation in organic photovoltaics (OPVs). The offsets in frontier orbital energies help to determine the excess free energy available for emissive state creation in OLEDs, or the driving force for photocurrent production, and the upper limit to the open-circuit photopotential in OPVs. Further details can be found in the article by N. R. Armstrong,* W. Wang, D. M. Alloway, D. Placencia, E. Ratcliff, and M. Brumbach on page 717.

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