Macromolecular Rapid Communications

Cover image for Vol. 34 Issue 8

April 25, 2013

Volume 34, Issue 8

Pages 625–694

  1. Cover Picture

    1. Top of page
    2. Cover Picture
    3. Masthead
    4. Contents
    5. Communications
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      Macromol. Rapid Commun. 8/2013 (page 625)

      Kejian Yao, Ying Chen, Jun Zhang, Clay Bunyard and Chuanbing Tang

      Article first published online: 14 APR 2013 | DOI: 10.1002/marc.201370024

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      Front Cover: Cationic bottle-brush polymers exhibit ion-triggered stimuli-response. These polymers are synthesized by a combination of ring-opening metathesis polymerization, ring-opening polymerization, and click chemistry. With the increase of ionic strength in solution, single brush polymers undergo a transition from extended conformation to collapsed state due to the screening effect of salts that yields once-dominant electrostatic interactions to hydrophobic–hydrophobic interactions. Further details can be found in the article by K. Yao, Y. Chen, J. Zhang, C. Bunyard, and C. Tang* on page 645.

  2. Masthead

    1. Top of page
    2. Cover Picture
    3. Masthead
    4. Contents
    5. Communications
    1. Macromol. Rapid Commun. 8/2013

      Article first published online: 14 APR 2013 | DOI: 10.1002/marc.201370025

  3. Contents

    1. Top of page
    2. Cover Picture
    3. Masthead
    4. Contents
    5. Communications
    1. Macromol. Rapid Commun. 8/2013 (pages 627–629)

      Article first published online: 14 APR 2013 | DOI: 10.1002/marc.201370026

  4. Communications

    1. Top of page
    2. Cover Picture
    3. Masthead
    4. Contents
    5. Communications
    1. Fabrication of Mussel-Inspired Highly Adhesive Honeycomb Films Containing Catechol Groups and Their Applications for Substrate-Independent Porous Templates (pages 630–634)

      Yuta Saito, Takahito Kawano, Masatsugu Shimomura and Hiroshi Yabu

      Article first published online: 19 MAR 2013 | DOI: 10.1002/marc.201200839

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      Substrate-independent adhesive honeycomb films are prepared from amphiphilic copolymers containing catechol groups as hydrophilic moieties. The top layers of the honeycomb films, prepared from an amphiphilic copolymer, which contain an optimum number of catechol moieties, exhibit excellent adhesion under alkaline and acidic conditions. Micrometer-sized dimple arrays are prepared on various surfaces by using a top layer of the film as an etching mask.

    2. Light-Switchable Polymer from Cationic to Zwitterionic Form: Synthesis, Characterization, and Interactions with DNA and Bacterial Cells (pages 635–639)

      Patrik Sobolčiak, Mário Špírek, Jaroslav Katrlík, Peter Gemeiner, Igor Lacík and Peter Kasák

      Article first published online: 12 FEB 2013 | DOI: 10.1002/marc.201200823

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      A polymer containing photolabile o-nitrobenzyl carboxymethyl pendant on a quaternary ammonium moiety in the monomer unit is synthesized. Light-induced switch from cationic to zwitterionic form is utilized for controlled interaction with DNA and bacteria.

    3. Biomimetic Dopamine-Diels–Alder Switches (pages 640–644)

      Corinna M. Preuss, Anja S. Goldmann, Vanessa Trouillet, Andreas Walther and Christopher Barner-Kowollik

      Article first published online: 12 MAR 2013 | DOI: 10.1002/marc.201300094

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      Biomimetic switching: Mussel adhesives operate as tools for surface modification of a wide variety of materials due to their remarkable adhesion properties. Herein, a combination of biomimetic mussel adhesives, polymer chemistry, and well-established Diels–Alder chemistry leads to a biomimetic switch system on surfaces that possesses the capability of attaching and detaching specific polymers on demand.

    4. Cationic Salt-Responsive Bottle-Brush Polymers (pages 645–651)

      Kejian Yao, Ying Chen, Jun Zhang, Clay Bunyard and Chuanbing Tang

      Article first published online: 13 MAR 2013 | DOI: 10.1002/marc.201300088

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      Cationic salt-responsive bottle-brush polymers with norbornene as the backbone and quaternary ammonium (QA)-containing polycaprolactone copolymers as side chains are synthesized by a combination of ring-opening metathesis polymerization, ring-opening polymerization, and click reaction. Brush polymers containing 20 mol% cationic QA groups show excellent salt responsive property in aqueous solution.

    5. Access to Different Nanostructures via Self-Assembly of Thiourea-Containing PEGylated Amphiphiles (pages 652–658)

      Shrinivas Venkataraman, Zarir Ashraf Chowdhury, Ashlynn L. Lee, Yen Wah Tong, Isamu Akiba and Yi Yan Yang

      Article first published online: 11 MAR 2013 | DOI: 10.1002/marc.201200751

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      Different nanostructural morphologies are accessed by simply dissolving readily water-soluble thiourea-containing PEGylated amphiphiles. Both the chemical composition and the nature of packing (due to thermal treatment) affect the morphology and the dimension of nanostructures. These nanostructures can potentially be used for the delivery of a variety of therapeutics as well as tissue engineering.

    6. Graphene Enhances the Shape Memory of Poly (acrylamide-co-acrylic acid) Grafted on Graphene (pages 659–664)

      Jun Dong, Jiabao Ding, Jian Weng and Lizong Dai

      Article first published online: 13 MAR 2013 | DOI: 10.1002/marc.201200814

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      Graphene enhances shape memory: Acrylamide and acrylic acid are grafted on graphene by free-radical polymerization to produce a series of graphene–poly(acrylamide-co-acrylic acid) hybrid materials with different contents of graphene. The materials demonstrate a shape memory effect and self-healing ability when the content of graphene is in the range of 10%–30%. The permanent shape of the materials can be recovered well after 20 cycles of cut and self-healing.

    7. Polymerized Ionic Liquid as Stabilizer in Aqueous Emulsion Polymerization Enables a Hydrophilic–Hydrophobic Transition during Film Formation (pages 665–671)

      Nehad Rozik, Markus Antonietti, Jiayin Yuan and Klaus Tauer

      Article first published online: 14 APR 2013 | DOI: 10.1002/marc.201200827

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      Polymerized ionic liquids (PILs) are a new class of very effective colloidal stabilizers for emulsion polymerization. In contrast to state of the art emulsifiers for latex particles, PILs have the decisive advantage that they do not increase the hydrophilicity of the final polymeric product but act, due to their inherent properties, in the opposite direction and increase the hydrophobicity.

    8. Hetero Diels–Alder Chemistry for the Functionalization of Single-Walled Carbon Nanotubes with Cyclopentadienyl End-Capped Polymer Strands (pages 672–680)

      Nicolas Zydziak, Corinna M. Preuss, Volker Winkler, Michael Bruns, Christof Hübner and Christopher Barner-Kowollik

      Article first published online: 18 MAR 2013 | DOI: 10.1002/marc.201300025

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      Cyclopentadienyl end-capped polymer strands react at the surface of pre-functionalized single-walled carbon nanotubes with a pyridine-based dithioester through a hetero Diels–Alder reaction. Elemental analysis and X-ray photoelectron spectroscopy are employed to determine the grafting density.

    9. Synthesis of a Novel Low-Bandgap Polymer Based on a Ladder-Type Heptacyclic Arene Consisting of Outer Thieno[3,2-b]thiophene Units for Efficient Photovoltaic Application (pages 681–688)

      Xiaofeng Xu, Ping Cai, Yong Lu, Ng Siu Choon, Junwu Chen, Beng S. Ong and Xiao Hu

      Article first published online: 12 MAR 2013 | DOI: 10.1002/marc.201300028

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      A novel conjugated polymer PIDTT-quinoxaline (Qx) based on the coplanar thieno[3,2-b]thiophene-phenylene-thieno[3,2-b]thiophene structure is synthesized as the electron-donor material for bulk-heterojunction polymer solar cells. The forced planarization structure with heptacyclic rings can further facilitate effective π-electron delocalization, extend effective conjugation length of the backbone, and intensely reduce the target polymer's bandgap. Efficient bulk-heterojunction polymer solar cells with PCE of about 5.1% are fabricated.

    10. Photoluminescent Toroids Formed by Temperature-Driven Self-Assembly of Rhodamine B End-Capped Poly(N-isopropylacrylamide) (pages 689–694)

      Chih-Yuan Hsu, Shih-Chieh Chang, Keh-Ying Hsu and Ying-Ling Liu

      Article first published online: 12 MAR 2013 | DOI: 10.1002/marc.201300038

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      Polymeric toroids of rhodamine B (RhB) end-capped poly(N-isopropylacryamide) (PNIPAAm-RhB) are obtained with a temperature-driven self-assembly process, to demonstrate a novel approach of formation of polymeric toroids.

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