RSC Publishing China

Dendritic complexes for white polymer light-emitting diodes. Chinese scientists have fabricated single-layer white polymer light-emitting devices (WPLED) by double-doping sky-blue emitter iridium(III) bis(2-(4,6-difluorophenyl)-pyridinato-N,C2)picolinate (FIrpic) into orange iridium dendrimers. These WPLEDs achieve the maximum current/power/external quantum efficiencies of 37.0 cd A−1/19.4 lm W−1/18.5%, which are among the highest efficiencies for dual-color WPLEDs ever reported.

Highly efficient single-layer white polymer light-emitting devices employing triphenylamine-based iridium dendritic complexes as orange emissive component: Minrong Zhu, Jianhua Zou, Sujun Hu, Chen’ge Li, Chuluo Yang, Hongbin Wu, Jingui Qin and Yong Cao, J. Mater. Chem., 2012, 22, 361-366

Stacking-induced phosphorescence from organic radical materials. A new class of organic phosphorescent materials have been developed by scientists at University of Science and Technology of China. Based on salts of an organic radical material, the phosphorescent complexes show stacking-induced white-light and blue-light phosphorescence. The team say that these materials could lead to new LEDs.

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

Read both of the papers for free until 12th January (free registration required).

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– Russell Johnson, Development Editor, Journal of Materials Chemistry

Au@Pd bimetallic nanoparticles were successfully dispersed on graphene by a simple one step reducing method.

The bimetallic nanoparticles show superior catalytic activity over the monometallic counterparts. Including the Au core minimizes the use of more expensive Pd precursors and plays an important role in enhancing the catalytic activity arising from the strong catalytic bimetallic electronic ligand interactions. The composition and shell thickness of the nanoparticles is controlled by loading different amounts of the metallic precursors. Interested to know more? Read the article for free until 16th December…

Graphene supported Au-Pd bimetallic nanoparticles with core-shell structures and superior peroxidase-like activities
Hongyu Chen, Yang Li, Fengbao Zhang, Guoliang Zhang and Xiaobin Fan
J. Mater. Chem., 2011, 21, 17658-17661
DOI: 10.1039/C1JM13356J

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– Russell Johnson, Development Editor, Journal of Materials Chemistry

Researchers combined silver nanoparticles and iron oxide to make nanoparticles with Ag@Fe2O3 yolk–shell structure.

After functionalization of the surface with glucose, these magnetic nanoparticles show high capture efficiency of bacteria and potent antibacterial activity because of Ag cores.

Interested to know more? Read the article for free until 7 December (free registration required)

Communication: Multifunctional Ag@Fe2O3 yolk–shell nanoparticles for simultaneous capture, kill, and removal of pathogen
Zhanhua Wei, Zijian Zhou, Meng Yang, Chenghong Lin, Zhenghuan Zhao, Dengtong Huang, Zhong Chen and Jinhao Gao
J. Mater. Chem., 2011, 21, 16344-16348
DOI: 10.1039/C1JM13691G

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– Russell Johnson, Development Editor, Journal of Materials Chemistry

A chameleon cloth that changes colour in response a drop in oxygen concentration could be used to warn of oxygen deficient areas say Chinese scientists.

The colour of the cloth gradually changes from red to purple to blue as the oxygen concentration increases. The light, soft and flexible cotton cloth could be easily included in clothes to make wearable sensors the team say.

Read the full paper for free until 8^th December:

Communication: Chameleon clothes for quantitative oxygen imaging
Xu-dong Wang, Ting-yao Zhou, Xin-hong Song, Yaqi Jiang, Chaoyong James Yang and Xi Chen
J. Mater. Chem., 2011, 21, 17651-17653
DOI: 10.1039/C1JM14162G

This paper was also featured in Chemistry World.

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– Russell Johnson, Development Editor, Journal of Materials Chemistry

A soft porous crystal which changes its fluorescence in response to mechanical grinding and heat has been developed by scientists in China.

Applying mechanical force changes the organic crystal’s fluorescence from yellow through to cherry red. Heating the crystal reverses this. The team say this mechanofluorochromism is caused by the crystal going through multiple structural transformations.

Read the full paper for free until 5th December:

Construction of soft porous crystal with silole derivative: strategy of framework design, multiple structural transformability and mechanofluorochromism
J. Mei, J. Wang, A. Qin, H. Zhao, W. Yuan, Z. Zhao, H. H. Y. Sung, C. Deng, S. Zhang, I. D. Williams, J. Z. Sun and B. Z. Tang
J. Mater. Chem., 2012, Advance Article
DOI: 10.1039/C1JM12673C

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– Russell Johnson, Development Editor, Journal of Materials Chemistry