Macromolecular Rapid Communications

Cover image for Vol. 38 Issue 16

Early View (Online Version of Record published before inclusion in an issue)

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  1. 1 - 46
  1. Communications

    1. Multidirectional Wrinkle Patterns Programmed by Sequential Uniaxial Strain with Conformal yet Nontraceable Masks

      Hyunchul Park, Hyesung Cho, Albert S. Lee, Seunggun Yu, Jin Hong Lee, Kie Yong Cho, Soon Man Hong and Chong Min Koo

      Version of Record online: 18 AUG 2017 | DOI: 10.1002/marc.201700311

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      Multidirectional wrinkle structures with poly(dimethylsiloxane) are developed via a combination of sequential uniaxial strain with a conformal microstencil. Scalable manufacturing of free-form multidirectional soft elastomers is demonstrated through a two-step stretching process with a polymeric microstencil, representing a versatile principle for design and manufacturing of multidirectional wrinkles with various surface functionalities.

    2. New ROMP Synthesis of Ferrocenyl Dendronized Polymers

      Xiong Liu, Qiangjun Ling, Li Zhao, Guirong Qiu, Yinghong Wang, Lianxiang Song, Ying Zhang, Jaime Ruiz, Didier Astruc and Haibin Gu

      Version of Record online: 18 AUG 2017 | DOI: 10.1002/marc.201700448

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      Dendronized norbornenes containing three or nine ferrocenyl termini are polymerized in a controller manner using Grubbs' third-generation olefin metathesis catalyst with various monomer/catalyst feed ratios. The numbers of ferrocenyl groups are in agreement with the theoretical ones according to cyclic voltammetry studies using the Bard–Anson method.

    3. Responsiveness and Morphology Study of Dual Stimuli-Controlled Supramolecular Polymer

      Chenxiao Xiong, Meiran Xie and Ruyi Sun

      Version of Record online: 16 AUG 2017 | DOI: 10.1002/marc.201700358

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      A linear supramolecular polymer formed by dual host–guest recognitions is presented. The stimuli-responsive feature of the polymer to light irradiation and chemical redox process is investigated. Evident morphology changes show the monomer guest assembles to the polymer and the polymer disassembles to the pseudorotaxane upon light irradiation.

    4. Biocatalytic Stimuli-Responsive Asymmetric Triblock Terpolymer Membranes for Localized Permeability Gating

      Jennifer L. Poole, Scott Donahue, David Wilson, Yuk Mun Li, Qi Zhang, Yibei Gu, Rachel Ferebee, Zhao Lu, Rachel Mika Dorin, Lawrence F. Hancock, Larry Takiff, Ilhem F. Hakem, Michael R. Bockstaller, Ulrich Wiesner and Jeremy Walker

      Version of Record online: 15 AUG 2017 | DOI: 10.1002/marc.201700364

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      Dynamically responsive nanoporous membranes with high substrate specificity and localized gating response are fabricated by integration of self-assembly and nonsolvent induced phase separation process from poly(isoprene-b-styrene-b-4-vinylpyridine) with pore functionalization by an enzyme (phosphotriesterase). This offers intriguing opportunities for molecularly engineered biomimetic materials tailored to respond to a complex range of external parameters, providing sensing, protection, and remediation capabilities.

    5. A Useful Method for Preparing Mixed Brush Polymer Grafted Nanoparticles by Polymerizing Block Copolymers from Surfaces with Reversed Monomer Addition Sequence

      Yang Zheng, Yucheng Huang and Brian C. Benicewicz

      Version of Record online: 14 AUG 2017 | DOI: 10.1002/marc.201700300

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      This paper describes the utilization of the low blocking efficiency of reversed monomer addition order (i.e., the “wrong order”) in combination with surface initiated reversible addition−fragmentation chain-transfer polymerization to establish a facile procedure toward mixed polymer brush grafted nanoparticles SiO2-g-(PS, PS-b-PMAA). Additionally, the SiO2-b-(PS, PS-b-PMAA) nanoparticles are amphiphilic in nature and show unique and controllable self-assembly behavior in water.

    6. Lowering the Healing Temperature of Photoswitchable Dynamic Covalent Polymer Networks

      Anne Fuhrmann, Kevin Broi and Stefan Hecht

      Version of Record online: 10 AUG 2017 | DOI: 10.1002/marc.201700376

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      Dynamic covalent polymer networks based on photoswitchable crosslinkers exhibit improved thermal healability that can be switched “on” and “off” by light. Combining new difunctional crosslinkers with various linear polymethacrylates lowers the temperature required to repair damage, such as scratches in thin films, by 20 K, thereby prolonging the lifetime of the material.

  2. Feature Articles

    1. Click Chemistry in Functional Aliphatic Polycarbonates

      Yu Dai, Xiaojin Zhang and Fan Xia

      Version of Record online: 10 AUG 2017 | DOI: 10.1002/marc.201700357

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      Click chemistry is a critical methodology in synthesizing functional aliphatic polycarbonates in the past two decades. In this Feature Article, six categories of click reactions (alkyne-azide reaction, thiol-ene reaction, Michael addition, epoxy-amine/thiol reaction, Diels-Alder reaction, and imine formation) that have been afforded for further post-polymerization modification of polycarbonates are reviewed. The features and limitations of each reaction are also summarized.

  3. Communications

    1. Catenane Crosslinked Mechanically Adaptive Polymer Gel

      Hao Xing, Zhengtao Li, Zi Liang Wu and Feihe Huang

      Version of Record online: 10 AUG 2017 | DOI: 10.1002/marc.201700361

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      A novel polymer gel is prepared by thiol-ene “click” reaction between a bisvinyl [2]catenane and a poly(ethylene glycol) derivative containing multiple thiol groups. Due to the existence of intercomponent hydrogen bonding in the catenane crosslinker, the resulting gel exhibits a mechanically adaptive property.

    2. Manipulation of Molecular Weight Distribution Shape as a New Strategy to Control Processing Parameters

      Milena Nadgorny, Dillon T. Gentekos, Zeyun Xiao, S. Parker Singleton, Brett P. Fors and Luke A. Connal

      Version of Record online: 10 AUG 2017 | DOI: 10.1002/marc.201700352

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      Shaping the symmetry of molecular weight distribution by utilization of a facile synthetic technique is demonstrated as a powerful strategy to engineer rheological properties, and therefore to tune the processing parameters of polymers. This is an efficient approach to process polymers at milder conditions without alternating their chemical properties.

    3. “Breathing” CO2-, O2-, and Light-Responsive Vesicles from a Triblock Copolymer for Rate-Tunable Controlled Release

      Shaojian Lin, Jiaojiao Shang, Xiaoxiao Zhang and Patrick Theato

      Version of Record online: 9 AUG 2017 | DOI: 10.1002/marc.201700313

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      “Breathing” vesicles are self-assembled from a CO2-, O2-, and light-responsive amphiphilic block copolymer in aqueous solution. The size of these vesicles could be reversibly adjusted via addition and removal of external stimuli to present corresponding “breathing” transition behaviors. Based on this feature, these vesicles can exhibit rate-tunable controlled release behavior depending on external stimuli.

    4. Distinct Interfacial Fluorescence in Oil-in-Water Emulsions via Exciton Migration of Conjugated Polymers

      Byungjin Koo and Timothy M. Swager

      Version of Record online: 3 AUG 2017 | DOI: 10.1002/marc.201700262

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      Surfactant-type, perylene-endcapped fluorescent conjugated polymers that exhibit two different emissions are reported, which are cyan in water and red at oil–water interfaces. Exciton migration and dual fluorescence of the polymers in different physical environments can provide a new concept of visualization methods in many amphiphilic colloidal systems and bioimaging.

    5. 4D Origami by Smart Embroidery

      Georgi Stoychev, Mir Jalil Razavi, Xianqiao Wang and Leonid Ionov

      Version of Record online: 31 JUL 2017 | DOI: 10.1002/marc.201700213

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      One of the most ancient structuring technologies, embroidery, is applied to a completely new set of materials to generate active patterns for directed operation. Simple contraction/elongation of shape-memory fibers is transformed into complex and controlled movement of a substrate.

    6. A Four-Armed Unsymmetrical Cryptand: From Two Different Host–Guest Interactions to Responsive Supramolecular Polymer

      Chenhao Yao, Jing Zhang, Ming Cheng, Qiang Sun, Yi Pan, Juli Jiang and Leyong Wang

      Version of Record online: 31 JUL 2017 | DOI: 10.1002/marc.201700218

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      A four-armed cryptand 1 containing BMP32C10 and DB24C8 motifs is synthesized, which can bind paraquat 2 and dibenzylammonium salt 3 via two kinds of interactions at the same time. The pH-responsive supramolecular polymer is constructed further among cryptand 1 and two homoditopic guests 4 and 5.

    7. Facile Synthesis of In-Chain, Multicomponent, Functionalized Polymers via Living Anionic Copolymerization through the Ugi Four-Component Reaction (Ugi-4CR)

      Heyu Shen, Hongwei Ma, Pibo Liu, Wei Huang, Li Han, Chao Li and Yang Li

      Version of Record online: 31 JUL 2017 | DOI: 10.1002/marc.201700353

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      The Ugi four-component reaction (Ugi-4CR) is a type of multicomponent reaction, and it has attractive characteristics such as modularity, efficient conversation, being being catalyst-free, having mild conditions, and multifunctionality at one location. Via a modified strategy of Ugi-4CR, a variety of functional groups are efficiently clicked on the well-defined polymers synthesized by the copolymerization of styrene with Ugi-1,1-diphenylethylene via living anionic polymerization.

  4. Reviews

    1. Stimuli-Responsive Metal-Organic Frameworks with Photoswitchable Azobenzene Side Groups

      Anemar Bruno Kanj, Kai Müller and Lars Heinke

      Version of Record online: 31 JUL 2017 | DOI: 10.1002/marc.201700239

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      Metal-organic frameworks (MOFs) are nanoporous, crystalline hybrid materials that enable remote control over their key properties by incorporating linker molecules with photoswitchable azobenzene side groups. The applications of these stimuli-responsive nanoporous solids range from switching the adsorption capacity of various gases over remote-controlled release of guest molecules to continuously tunable membrane separation of molecular mixtures.

  5. Feature Articles

    1. Supramolecular Polymerization from Controllable Fabrication to Living Polymerization

      Zehuan Huang, Bo Qin, Linghui Chen, Jiang-Fei Xu, Charl F. J. Faul and Xi Zhang

      Version of Record online: 28 JUL 2017 | DOI: 10.1002/marc.201700312

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      Methods of supramolecular polymerization from controllable fabrication to living polymerization have been recently developed. The self-sorting approach, supramonomer method, and supramolecular interfacial polymerization extend methods of supramolecular polymerization for controllable fabrication under thermodynamic control. Furthermore, seeded polymerization under pathway complexity and chain-growth polymerization advance the living supramolecular polymerization upon kinetic control. These developments are summarized in this article.

  6. Communications

    1. Photoresponsive Conjugated Microporous Polymer Films Fabricated by Electrochemical Deposition for Controlled Release

      Ruiyang Zhao, Jishu Han, Mei Huang, Fusheng Liu, Lei Wang and Yuguang Ma

      Version of Record online: 27 JUL 2017 | DOI: 10.1002/marc.201700274

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      A novel kind of conjugated microporous polymer with the ability to demonstrate stimulated response is fabricated through an in situ electrochemical deposition method. The 3D microporous structure constructs a kind of inherent acceptor with “molecule switch” to capture, conserve, and release guest molecules with alternate irradiation by 355 and 480 nm laser beams.

    2. The Origin of Hierarchical Structure Formation in Highly Grafted Symmetric Supramolecular Double-Comb Diblock Copolymers

      Anton H. Hofman, Mehedi Reza, Janne Ruokolainen, Gerrit ten Brinke and Katja Loos

      Version of Record online: 27 JUL 2017 | DOI: 10.1002/marc.201700288

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      Given the low concentration of copolymer, it is surprising to see that symmetric and highly grafted supramolecular double-comb diblock copolymers can self-assemble into ordered hierarchical morphologies. Multiple phase transitions are responsible for such behavior, and enable this supramolecular approach to be applicable in both low- and high-molecular-weight systems.

    3. The One-Pot Directed Assembly of Cylinder-Forming Block Copolymer on Adjacent Chemical Patterns for Bimodal Patterning

      Tzu-Hsuan Chang, Shisheng Xiong, Chi-Chun Liu, Dong Liu, Paul F. Nealey and Zhenqiang Ma

      Version of Record online: 27 JUL 2017 | DOI: 10.1002/marc.201700285

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      Cylinder-forming block copolymer thin films, by tuning the surface chemistry of substrate, can be assembled into two different patterns. With the rational design of two adjacent chemical patterns, line/space grating structure and hexagon dot arrays are successfully achieved on corresponding area, but the patterning resolution is enhanced.

    4. Highly cis-1,4 Selective Living Polymerization of Unmasked Polar 2-(2-Methylidenebut-3-enyl)Furan and Diels–Alder Addition

      Shiyu Long, Fei Lin, Changguang Yao and Dongmei Cui

      Version of Record online: 27 JUL 2017 | DOI: 10.1002/marc.201700227

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      A novel polar polydiene with high cis-1,4 selectivity (98.6%) and narrow polydispersity (Mw/Mn = 1.17) is achieved through the coordination living polymerization of a new polar diene-based monomer. Moreover, a variety of functional rubber materials can be obtained via mild Diels–Alder addition with furan groups on the side chain of the polymer.

    5. Photo- and Thermoresponsive Dehydration of Spiropyran-Functionalized Polymer Regulated by Molecular Recognition

      Kimio Sumaru, Toshiyuki Takagi, Taku Satoh and Toshiyuki Kanamori

      Version of Record online: 26 JUL 2017 | DOI: 10.1002/marc.201700234

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      Drastic photoresponsive dehydration of a spiropyran-functionalized polymer induced by the photoisomerization of the chromophores at side chains from a cationic form to a nonionic and hydrophobic form is regulated by the inclusion of hydrophobic isomer by cyclodextrin in a size-specific manner.

    6. Synthesis of Unimolecular Micelles with Incorporated Hyperbranched Boltorn H30 Polyester modified with Hyperbranched Helical Poly(phenyl isocyanide) Chains and their Enantioselective Crystallization Performance

      Zhi-Huang Zhang, Chen-Yang Qiao, Jian Zhang, Wen-Ming Zhang, Jun Yin and Zong-Quan Wu

      Version of Record online: 25 JUL 2017 | DOI: 10.1002/marc.201700315

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      Well-defined chiral unimolecular Boltorn H30 micelles grafted with radiating helical poly(phenyl isocyanide) coronas of one predominant screw sense are obtained through a Pd(II)-catalyzed living polymerization, which endows them excellent optical activity and exhibits excellent performance in enantioselective crystallization of racemic threonine with an enantiomeric excess of the induced crystal up to 92%.

    7. Ferrocene-Based Hyperbranched Polytriazoles: Synthesis by Click Polymerization and Application as Precursors to Nanostructured Magnetoceramics

      Hongkun Li, Weiwen Chi, Yajing Liu, Wei Yuan, Yaowen Li, Yongfang Li and Ben Zhong Tang

      Version of Record online: 25 JUL 2017 | DOI: 10.1002/marc.201700075

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      Soluble ferrocene-based hyperbranched polytriazoles are readily synthesized by the Cu(I)-catalyzed click polymerizations between tris(4-ethynylphenyl)amine and ferrocene-containing diazides in dimethylformamide at 60 °C for 5 and 9 h in good yields. Pyrolysis of the polymers at high temperature yields nanostructured ceramics with high magnetizabilities.

    8. Hydrogen-Bonded Polymer–Porphyrin Assemblies in Water: Supramolecular Structures for Light Energy Conversion

      Anne Kutz, Wiebke Alex, Anja Krieger and Franziska Gröhn

      Version of Record online: 20 JUL 2017 | DOI: 10.1002/marc.201600802

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      Making the most of the sunlight: a novel type of functional nanostructure forms by self-assembly of porphyrins and dendrimeric macromolecules based on hydrogen bonding in aqueous solution. This results in a tunable photosensitizer activity of the porphyrins and improved photocatalysis, promising for solar-energy conversion.

    9. Hydrogels with Dual Thermoresponsive Mechanical Performance

      Hui Guo, Cécile Mussault, Alba Marcellan, Dominique Hourdet and Nicolas Sanson

      Version of Record online: 18 JUL 2017 | DOI: 10.1002/marc.201700287

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      Original chemical hydrogels combining antagonistic upper critical solution temperature and lower critical solution temperature polymers are elaborated via free radical polymerization. Rheological and mechanical experiments performed under isochoric conditions show a thermoinduced reinforcement both at low and high temperatures induced by the formation of phase-separated polymer domains acting as organic reinforcing filler.

  7. Reviews

    1. Shape-Shifting Azo Dye Polymers: Towards Sunlight-Driven Molecular Devices

      Oleksandr S. Bushuyev, Miho Aizawa, Atsushi Shishido and Christopher J. Barrett

      Version of Record online: 10 JUL 2017 | DOI: 10.1002/marc.201700253

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      Reversible light-control over molecular mechanical properties has attracted great recent interest for the development of polymeric optical-to-mechanical actuators. In this review, recent examples and emerging trends in this exciting field of research are highlighted, covering a wide range of polymers containing azobenzene photo-reversible switches, and their demonstration as functional ‘artificial muscles’, ‘devices’, and simple ‘molecular robotic machines’.

  8. Communications

    1. Ultrastrong and Tough Supramolecular Hydrogels from Multiurea Linkage Segmented Copolymers with Tractable Processablity and Recyclability

      Nannan Yang, Huili Yang, Zengwu Shao and Mingyu Guo

      Version of Record online: 10 JUL 2017 | DOI: 10.1002/marc.201700275

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      The design of multiurea linkage segmented linear copolymers with tractable synthesis, processability, hybridization, and recyclability is reported in this work, having accessible handles with which fully swollen ultrastrong hydrogels or stretchable hydrogel fibers with nano-, micro-, or macroscale diameters can be produced via different manufacturing techniques including compression, solution casting, or spinning.

    2. Metal-Folded Single-Chain Nanoparticle: Nanoclusters and Self-Assembled Reduction-Responsive Sub-5-nm Discrete Subdomains

      Hui Cao, Zhigang Cui, Pan Gao, Yi Ding, Xuechao Zhu, Xinhua Lu and Yuanli Cai

      Version of Record online: 10 JUL 2017 | DOI: 10.1002/marc.201700269

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      Nanoclusters and self-assembled reduction-responsive sub-5-nm discrete subdomains are achieved via coordination-driven self-assembly of 9% imidazole motifs in hydrophilic copolymer in the presence of Cu(II) in water; metal-center reduction using sodium ascorbate induces superstructure rearrangement one-order backwards.

    3. Synthesis and Characterization of a Novel Microporous Dihydroxyl-Functionalized Triptycene-Diamine-Based Polyimide for Natural Gas Membrane Separation

      Nasser Alaslai, Xiaohua Ma, Bader Ghanem, Yingge Wang, Fahd Alghunaimi and Ingo Pinnau

      Version of Record online: 10 JUL 2017 | DOI: 10.1002/marc.201700303

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      A novel dihydroxyl-functionalized triptycene diamine, 2,6(7)-dihydroxy-3,7(6)-diaminotriptycene (DAT1-OH), was designed and used for the synthesis of an intrinsically microporous polyimide, 4,4′-(hexafluoroisopropylidene)diphthalic anhydride-DAT1-OH. The solution-processable polyimide is plasticization resistant and exhibits excellent mixed-gas performance with CO2 permeability of 50 Barrer and CO2/CH4 selectivity of 40 at a typical natural gas wellhead pressure of 10 bar.

  9. Reviews

    1. Sequence and Architectural Control in Glycopolymer Synthesis

      Yamin Abdouni, Gokhan Yilmaz and C. Remzi Becer

      Version of Record online: 10 JUL 2017 | DOI: 10.1002/marc.201700212

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      Recent advances in precision glycopolymer synthesis, from sequence control and monomer sequence to glycopolymer self-assembly into distinct nanostructures, are reviewed. Single-chain folding and its limitations in glycopolymer synthesis are critically discussed as a future prospect.

  10. Communications

    1. Self-Forming Interlocking Interfaces on the Immiscible Polymer Bilayers via Gelation-Mediated Phase Separation

      Xiaozhuang Zhou, Guoqiang Ma, Huaixia Zhao and Jiaxi Cui

      Version of Record online: 10 JUL 2017 | DOI: 10.1002/marc.201700206

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      Interlocking interface structure self-forms between immiscible silicone/epoxy bilayers when evaporation-induced gelation occurs during phase separation. At the phase separating interface, droplets are fixed when approaching their homogeneous phases. This facile one-pot casting method can increase interface adhesion without changing interface chemical composition.

    2. Direct Creation of Highly Conductive Laser-Induced Graphene Nanocomposites from Polymer Blends

      Alireza Zehtab Yazdi, Ivonne Otero Navas, Ahmed Abouelmagd and Uttandaraman Sundararaj

      Version of Record online: 4 JUL 2017 | DOI: 10.1002/marc.201700176

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      Highly electrically conductive polymer/graphene nanocomposites are created from polymer blends via CO2 laser irradiation. Polyetherimide is in situ converted into graphene nanosheets with 3D columnar microstructure in the polycarbonate matrix upon exposure to laser.

    3. Photo-Induced Bending Behavior of Post-Crosslinked Liquid Crystalline Polymer/Polyurethane Blend Films

      Xinlei Pang, Bo Xu, Xin Qing, Jia Wei and Yanlei Yu

      Version of Record online: 30 JUN 2017 | DOI: 10.1002/marc.201700237

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      Blend films with crosslinkable liquid crystalline polymer PAZO as a photosensitive component and flexible polyurethane (PU) as the matrix show fast photo-induced bending behavior upon exposure to unpolarized UV light at ambient temperature. The photosensitive blend film possesses favorable mechanical property and good processability at low cost, and it is a promising candidate for a new generation of actuators.

    4. Bicomponent Block Copolymers Derived from One or More Random Copolymers as an Alternative Route to Controllable Phase Behavior

      Arman R. Ashraf, Justin J. Ryan, Michael M. Satkowski, Byeongdu Lee, Steven D. Smith and Richard J. Spontak

      Version of Record online: 29 JUN 2017 | DOI: 10.1002/marc.201700207

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      Block copolymer phase behavior is often dictated by temperature, molecular weight, and composition. It is shown that it can be tailored with blocks composed of one or more random copolymers. Microphase separation is observed (see figure), and large incompatibility variation can occur at fixed molecular weight and temperature.

  11. Feature Articles

    1. Locking the Coplanar Conformation of π-Conjugated Molecules and Macromolecules Using Dynamic Noncovalent Bonds

      Congzhi Zhu and Lei Fang

      Version of Record online: 27 JUN 2017 | DOI: 10.1002/marc.201700241

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      Backbone conformation plays a crucial role in shaping the properties of π-conjugated molecules and macromolecules. The introduction of pre-organized dynamic noncovalent interactions onto π-conjugated systems enables active control on conformation, leading to tailored properties and functions.

    2. Light-Switchable Azobenzene-Containing Macromolecules: From UV to Near Infrared

      Philipp Weis and Si Wu

      Version of Record online: 23 JUN 2017 | DOI: 10.1002/marc.201700220

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      Gently switch it! Trans-to-cis photoisomerization in conventional azobenzene-containing macromolecules is induced by ultraviolet (UV) light. However, UV light is problematic for biomedical and solar-energy-related applications. We review the strategies for the construction of visible- and near-infrared light-responsive azobenzene-containing macromolecules, highlight the potential applications of these macromolecules, and discuss the remaining challenges.

  12. Communications

    1. Fabrication of pH- and Thermoresponsive Three-Layered Micelles via Host–Guest Interactions

      Jingyan Zhang, Haiou Zhou, Hao Liu, Jinming Hu and Shiyong Liu

      Version of Record online: 12 JUN 2017 | DOI: 10.1002/marc.201700225

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      Thermo- and pH-responsive three-layered micelles are successfully constructed via the formation inclusion complexation between β-cyclodextrin and adamantyl moieties.

    2. Ultrastiff Hydrogels Prepared by Schiff's Base Reaction of Bis(p-Formylphenyl) Sebacate and Pillar[5]arene Appended with Multiple Hydrazides

      Huaqiang Ju, Fengbo Zhu, Hao Xing, Zi Liang Wu and Feihe Huang

      Version of Record online: 6 JUN 2017 | DOI: 10.1002/marc.201700232

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      Based on the formation of acylhydrazone bonds, polymer organogels are facily developed using a pillar[5]arene derivative appended with multiple hydrazide groups as the corsslinks. Hydrogels with dramatically enhanced strength and stiffness are obtained by solvent exchange from dimethyl sulfoxide to water.

    3. Light-Driven, Caterpillar-Inspired Miniature Inching Robot

      Hao Zeng, Owies M. Wani, Piotr Wasylczyk and Arri Priimagi

      Version of Record online: 31 MAY 2017 | DOI: 10.1002/marc.201700224

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      Soft robotics brings revolutionary possibilities to devising new moving mechanisms, being pertinent for both fundamental and applied sciences. A light-driven, human-friendly microrobot is reported that can mimic caterpillar inching locomotion with spatially uniform illumination. The robot is made of liquid crystal elastomer film with engineered molecular alignment distribution, and it can perform inching gait on various surfaces, including human skin.

    4. Side-Chain Effects on the Thermoelectric Properties of Fluorene-Based Copolymers

      Ansheng Liang, Xiaoyan Zhou, Wenqiao Zhou, Tao Wan, Luhai Wang, Chengjun Pan and Lei Wang

      Version of Record online: 24 MAY 2017 | DOI: 10.1002/marc.201600817

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      Conjugated polymers with different lengths of alkyl chain are designed and synthesized, and their structure–property relationships as organic thermoelectric materials are systematically investigated. The thermoelectric properties of the conjugated polymers are strongly influenced by the length of the alkyl chains. Polymers with a short alkyl chain tend to exhibit good thermoelectric properties.

    5. End Functionalized Nonionic Water-Dispersible Conjugated Polymers

      Ruoyu Zhan and Bin Liu

      Version of Record online: 16 MAY 2017 | DOI: 10.1002/marc.201700010

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      Two nonionic water-dispersible conjugated polymers with high oligo(ethylene glycol) densities have been synthesized to show excellent water solubility, high quantum yields, good ionic strength resistance, and minimal nonspecific interactions with bovine serum albumin. They are further biotinylated to bind with streptavidin on solid surface to yield bright green fluorescence.

    6. Metal-Free Poly-Cycloaddition of Activated Azide and Alkynes toward Multifunctional Polytriazoles: Aggregation-Induced Emission, Explosive Detection, Fluorescent Patterning, and Light Refraction

      Yongwei Wu, Benzhao He, Changyun Quan, Chao Zheng, Haiqin Deng, Rongrong Hu, Zujin Zhao, Fei Huang, Anjun Qin and Ben Zhong Tang

      Version of Record online: 11 MAY 2017 | DOI: 10.1002/marc.201700070

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      Multifunctional polytriazoles with high molecular weights (up to 32 000) and excellent solubility are synthesized via metal-free poly-cycloaddition of activated azide and alkynes. The resultant polymers exhibit the unique aggregation-induced emission feature and possess high refractive indices. Their nanoaggregates can be used to detect explosives with superamplification quenching effect and their films can generate 2D fluorescent photopatterns upon UV irradiation.

    7. Photoresponsive Passive Micromixers Based on Spiropyran Size-Tunable Hydrogels

      Jeroen ter Schiphorst, Giuseppe G. Melpignano, Hossein Eslami Amirabadi, Menno H. J. M. Houben, Sterre Bakker, Jaap M. J. den Toonder and Albertus P. H. J. Schenning

      Version of Record online: 18 APR 2017 | DOI: 10.1002/marc.201700086

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      Passive micromixers have proven their use in microfluidic systems, improving the mixing efficiency and allowing higher throughput. In this work a spiropyran containing photoresponsive size-tunable hydrogel based passive micromixer is fabricated, which is used as a passive micromixer allowing to switch from a mixed to a nonmixed fluid flow in a microchannel by light.

    8. Scalable Synthesis and Multi-Electron Transfer of Aniline/Fluorene Copolymer for Solution-Processable Battery Cathodes

      Fei Li, Yang Zou, Shaoyang Wang, Lei Fang and Jodie L. Lutkenhaus

      Version of Record online: 7 APR 2017 | DOI: 10.1002/marc.201700067

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      A poly(aniline-co-fluorene) (PAF) polymer is synthesized on multigram scale as battery cathode material. Excellent solution processability of PAF allows binder-free fabrication of organic polymer cathodes that exhibit multi-electron transfer and high battery performance. This work has provided a novel molecular design principle for utilizing conjugated polymers in lithium ion battery applications.

  13. Reviews

    1. Wettability with Aggregation-Induced Emission Luminogens

      Zubin Wang, Liping Heng and Lei Jiang

      Version of Record online: 17 MAR 2017 | DOI: 10.1002/marc.201700041

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      In this review, advances in the surface wettability of AIEgens and its applications in wetting fields are reviewed, such as monitoring the crystal formation and the dewetting behavior in the self-assembly process, fabricating stimuli-responsive AIE-active wettability surfaces, liquid reprography, and so forth.

  14. Communications

    1. Solution-Processable Hyperbranched Conjugated Polymer Nanoparticles Based on C3h-Symmetric Benzotrithiophene for Polymer Solar Cells

      Xiaofu Wu, Zijian Zhang, Hao Hang, Yonghong Chen, Yuxiang Xu, Hui Tong and Lixiang Wang

      Version of Record online: 21 FEB 2017 | DOI: 10.1002/marc.201700001

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      C3h-symmetric benzotrithiophene-based hyperbranched conjugated polymer nanoparticles (BTT-HCPNs) with tunable particle sizes are prepared via Stille miniemulsion polymerization for the first time. Comparing with the corresponding star-shaped small molecule (C3h-BTT core with three diketopyrrolopyrrole arms), solution-processable BTT-HCPNs show redshifted and broader absorption spectra and narrower bandgaps, leading to higher power conversion efficiencies for solar cells based on BTT-HCPNs/PC71BM.

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