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Themed Issue: Organic Optoelectronic Materials

Journal of Materials Chemistry front coverThe themed issue on Organic Optoelectronic Materials is now online. Guest editors Wenping Hu, Zhenan Bao and Klaus Muellen introduce this themed issue of Journal of Materials Chemistry in their Editorial. This themed issue is dedicated to one of the pioneers of the field, Professor Daoben Zhu, on the occasion of his 70th birthday.

The issue contains a selection of communications, papers & reviews covering the field of organic optoelectronic materials including:

Highlight

Applications

Feature Articles

You can read all the papers in the themed issue here:

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A selection of hot reviews

Structures and properties of conjugated Donor–Acceptor copolymers for solar cell applications: Zhi–Guo Zhang and Jizheng Wang, J. Mater. Chem., 2012, DOI: 10.1039/C2JM14951F (Advance Article)

Graphical abstract: Structures and properties of conjugated Donor–Acceptor copolymers for solar cell applications

Functional fullerenes for organic photovoltaics: Chang-Zhi Li ,  Hin-Lap Yip and Alex K.-Y. Jen, J. Mater. Chem., 2012, DOI: 10.1039/C2JM15126J (Advance Article)

 Graphical abstract: Functional fullerenes for organic photovoltaics

Assemblies of artificial photosynthetic reaction centres: Shunichi Fukuzumi and Kei Ohkubo, J. Mater. Chem., 2012, DOI: 10.1039/C2JM15585K (Advance Article) 

 Graphical abstract: Assemblies of artificial photosynthetic reaction centres

Read all the articles for free until 12th March(Free registration required)

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Hot Paper: Watching the degradation of polymer semiconductors

Polymer semiconductor electronics are potentially cheaper, lighter and more flexible than their silicon counterparts. Despite the improvements in performance and efficiency there is still a challenge to improve the stability and lifetime of organic semiconductors, and to understand the degradation mechanisms which could limit their commercial success. In this Hot Article Steffan Cook and colleagues report the degradation of one of the most widely used conjugated polymer semiconductors, poly(3-hexylthiophene) [P3HT] monitored by fluorescence quenching. Conjugated polymer emission is known to be easily quenched at defect sites. The teams use the loss of fluorescence as a precise yet simple tool for monitoring degradation in conjugated polymers and demonstrated significant degradation to P3HT occurs in only a matter of minutes under room lighting. Read the article for free until 7th March. (Free registration required)

Graphical abstract: Matter of minutes degradation of poly(3-hexylthiophene) under illumination in air

Matter of minutes degradation of poly(3-hexylthiophene) under illumination in air: Steffan Cook,  Akihiro Furube and Ryuzi Katoh, J. Mater. Chem., 2012, DOI: 10.1039/C1JM14925C (Advance Article)

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Hot Paper: Highly efficient blue electrophosphorescence using simple CBP isomers with high triplet energies

Phosphorescent organic light-emitting diodes (PhOLEDs) offer high quantum efficiency compared to conventional fluorescent OLEDs because they can harness both singlet and triplet exitons for emission. Green and red PhOLEDs with 100% internal quantum efficiency have been reported, but highly efficient and stable blue PhOLEDs have yet to be developed because of the lack of suitable host materials possessing higher triplet energy levels than blue phosphors. In this hot paper Chuluo Yang, Dongge Ma and colleagues report two simple CBP isomers with high triplet energies as efficient hosts for blue phosphorescent OLEDs, and the efficiencies of the o-CBP-based device are over 2 times higher than those of CBP. Interested to know more? Read the article for free until 2nd March. (Free registration required)

Graphical abstract: Simple CBP isomers with high triplet energies for highly efficient blue electrophosphorescence

Simple CBP isomers with high triplet energies for highly efficient blue electrophosphorescence: Shaolong Gong, Xun He, Yonghua Chen, Zuoquan Jiang, Cheng Zhong, Dongge Ma, Jingui Qin and Chuluo Yang, J. Mater. Chem., 2012, 22, 2894-2899

 

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Hot Feature Article: Open-shell polycyclic aromatic hydrocarbons

Graphical abstract: Open-shell polycyclic aromatic hydrocarbonsOrganic π systems with an open-shell ground state have attractive properties that could find use applications such as nonlinear optics, spintronics devices and photovoltaics. Polycyclic aromatic hydrocarbons with unpaired or partially unpaired electrons display open-shell radical character. In this Hot Feature Article, Zhe Sun and Jishan Wu at the National University of Singapore summarize recent developments in open-shell polycyclic aromatic hydrocarbons covering both theoretical advances and the experimental progress, and touch on a few examples of their practical applications. Read for free until 1st March. (Free registration required)

Open-shell polycyclic aromatic hydrocarbons: Zhe Sun and Jishan Wu, J. Mater. Chem., 2012, DOI: 10.1039/C1JM14786B (Advance Article)

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Hot Article: Rolling up biocompatible microtubes

Graphical abstract: Fabrication and applications of large arrays of multifunctional rolled-up SiO/SiO2 microtubesThe fabrication of tubular microstructures has been successfully use in a range of applications including optofluidics, bio-sensing, catalytic microjet engines, magnetic sensors and 3D cell microreactors; however, the diameter scalability, hybrid functionalization, and long-term biocompatibility has not been investigated yet for rolled-up glass microtubes. In this hot paper large arrays of transparent, biocompatible SiO/SiO2 microtubes are fabricated by rolling up nanomembranes followed by etching to release the deposited layers. The outer tubular diameter is systematically studied and the roll-up parameters have been optimized to achieve a yield of nearly 100%. Samuel Sanchez and colleagues also demonstrate that these microtubes can be used in a range of applications.

Fabrication and applications of large arrays of multifunctional rolled-up SiO/SiO2 microtubes: Stefan M. Harazim, Wang Xi, Christine K. Schmidt, Samuel Sanchez and Oliver G. Schmidt, J. Mater. Chem., 2012, 22, 2878-2884

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J. Mater. Chem. paper featured in Science

Graphical abstract: Syntheses of nanostructured Cu- and Ni-based micro-assemblies with selectable 3-D hierarchical biogenic morphologiesA paper by Kenneth Sandhage and colleagues has been highlighted in the Editors’ Choice section of Science (A Layer-by-Layer Amplifier; subscription required). The paper describes a combined layer-by-layer surface amine amplification and electroless deposition process to convert 3-D nanostructured micro-assemblies into freestanding Cu-bearing or Ni-bearing structures.

… And here’s the full research paper:

Syntheses of nanostructured Cu- and Ni-based micro-assemblies with selectable 3-D hierarchical biogenic morphologies
Yunnan Fang, John D. Berrigan, Ye Cai, Seth R. Marder and Kenneth H. Sandhage, J. Mater. Chem., 2012, 22, 1305-1312

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Focus on: Shape memory polymers and nanocomposites

Shape memory materials are used in a range of applications from electrically conductive actuators to materials for biomedical engineering. Here we’ve brought together a selection of papers covering the fundamental properties and applications of shape memory polymers and nanocomposites.

Journal of Materials Chemistry

  1. Thermo-moisture responsive polyurethane shape-memory polymer and composites: a review
  2. Biomedical applications of thermally activated shape memory polymers
  3. A versatile approach to achieve quintuple-shape memory effect by semi-interpenetrating polymer networks containing broadened glass transition and crystalline segments
  4. Soft shape memory in main-chain liquid crystalline elastomers
  5. Shape memory epoxy: Composition, structure, properties and shape memory performances
  6. Analysis of non-covalent interactions between the nanoparticulate fillers and the matrix polymer as applied to shape memory performance
  7. Organic-inorganic chemical hybrids having shape memory effect
  8. Thermo-mechanical properties of polystyrene-based shape memory nanocomposites
  9. Nanotube fibers for electromechanical and shape memory actuators
  10. Modeling the morphology and mechanical behavior of shape memory polyurethanes based on solid-state NMR and synchrotron SAXS/WAXD
  11. Shape memory polymers with silicon-containing segments
  12. Star-shaped POSS-polycaprolactone polyurethanes and their shape memory performance
  13. Shape memory polyurethanes containing azo exhibiting photoisomerization function
  14. Organic-inorganic nanocomposite bilayers with triple shape memory effect
  15. Nanosize Si anode embedded in super-elastic nitinol (Ni-Ti) shape memory alloy matrix for Li rechargeable batteries
  16. High-strain shape memory polymer networks crosslinked by SiO(2)

Soft Matter

  1. Conductive shape memory nanocomposites for high speed electrical actuation
  2. A new approach to shape memory polymer: design and preparation of poly(methyl methacrylate) composites in the presence of star poly(ethylene glycol)
  3. Mechanisms of the multi-shape memory effect and temperature memory effect in shape memory polymers
  4. Solvent induced shape recovery of shape memory polymer based on chemically cross-linked poly(vinyl alcohol)
  5. A functionally graded shape memory polymer
  6. Light-activated shape memory of glassy, azobenzene liquid crystalline polymer networks
  7. Study of electroactive shape memory polyurethane-carbon nanotube hybrids
  8. Nanopaper enabled shape-memory nanocomposite with vertically aligned nickel nanostrand: controlled synthesis and electrical actuation

Soft Matter and Journal of Materials Chemistry front covers

If you’d like to read more papers in this area then why now read the Actively Moving Polymers or Emerging themes in soft matter: responsive and active soft materials themed issues.

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J. Mater. Chem. communication highlighted by ACS Noteworthy Chemistry

The communication by Guo-Ping Yong and colleagues described how purely organic radical materials can be used to generate stacking-induced white-light or blue-light phosphorescence. This article was selected as a hot article back in December. You can read the write up in ACS Noteworthy Chemistry here: Organic radicals efficiently emit phosphorescence

… And here is the original research article:

Communication: Stacking-induced white-light and blue-light phosphorescence from purely organic radical materials: Guo-Ping Yong, Yi-Man Zhang, Wen-Long She and Ying-Zhou Li, J. Mater. Chem., 2011, 21, 18520-18522

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Hot Article: “Clicked” fluoropolymer elastomers as robust materials for potential microfluidic device applications

Graphical abstract: “Clicked” fluoropolymer elastomers as robust materials for potential microfluidic device applicationsPDMS-based microfluidic devices are commonly used for aqueous based applications; however, their limited chemical resistance and high swelling in many common organic solvents make them unfeasible for uses involving organic solvents or harsh conditions. Here the authors report a new perfluoropolyether-based material, which has liquid-like viscosity and can be cured into a tough, highly durable elastomer. The highly fluorinated elastomer possesses remarkable resistance to a variety of organic solvents, water, heat and even harsh acidic and basic conditions.

Ying-Wei Yang, Jens Hentschel, Yi-Chun Chen, Mark Lazari, Hanxiang Zeng, R. Michael van Dam and Zhibin Guan, J. Mater. Chem., 2012, 22, 1100-1106

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