Journal of Materials Chemistry Blog

Phosphorescent OLEDs (PhOLEDs) which use triplet excitons offer superior performance compared to conventional fluorescent OLEDs; however, most of the high-performance PhOLEDs reported so far have been based on vacuum-deposited small-molecules involving thermal evaporation processes to create multilayered structures. Solution-based processes should provide a cheaper alternative to vacuum deposition for fabricating PhOLEDs.

In this Hot Paper Taeshik Earmme and Samson A. Jenekhe report high-performance multilayered PhOLEDs fabricated by orthogonal sequential solution-processing of a triplet-emitter-doped poly(N-vinylcarbazole)(PVK)-based emissive layer and widely used commercial small-molecule electron-transport materials. The team say that their results demonstrate that commercial small-molecule electron-transport materials can be readily solution-deposited to realise high-performance PhOLEDs. Interested to know more? Read the full article for free until 10th April.

High-performance multilayered phosphorescent OLEDs by solution-processed commercial electron-transport materials: Taeshik Earmme and Samson A. Jenekhe, J. Mater. Chem., 2012, 22, 4660-4668.

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Superparamagnetic iron oxide nanoparticles are used in applications such as target delivery, magnetic resonance imaging, hyperthermia and magnetic separation; however, nanoparticle synthesis often requires a sophisticated ligand exchange reaction to add the right functional groups to the nanoparticle surface. In this Hot Communication Charles J. O’Connor and co-workers at University of New Orleans and the University of Bordeaux report the synthesis of polyamine stabilized magnetite nanoparticles that are highly stable in aqueous solution. The surface amine groups are also readily available for further modification. Read for free until 12^th April (free registration required)

One-pot synthesis in polyamines for preparation of water-soluble magnetite nanoparticles with amine surface reactivity: Haiou Qu ,  Hui Ma ,  Aurélien Riviere ,  Weilie Zhou and Charles J. O’Connor, J. Mater. Chem., 2012, 22, 3311-3313

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Metal-organic frameworks are used in a range of applications such as catalysis, and gas storage and separation. In this Hot Feature Article Juan-Alcañiz , Jorge Gascon and Freek Kapteijn present a critical review of the recent progress in encapsulating active moieties in metal–organic frameworks. This review is focuses on active species bigger than the pores or windows of the host system (physically entrapped moieties), the synthetic methods followed, and the application of the resulting composites. Read for free until 2nd April

Metal–organic frameworks as scaffolds for the encapsulation of active species: state of the art and future perspectives: Jana Juan-Alcañiz, Jorge Gascon and Freek Kapteijn, J. Mater. Chem., 2012, DOI: 10.1039/C2JM15563J (Advance Article)

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