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A new family of sulfur-heteroarenes with a chrysene core was developed. Top-contact FET devices were fabricated with hole mobility up to 0.4 cm2V−1s−1. The results suggest that in addition to the much explored linear acenes, molecules with a nonlinearly fused core could also be used as active material in high-performance OFET. [ABSTRACT FROM AUTHOR]

Abstract: A5Nb4O15 (A=Ba, Sr) powders with hexagonal perovskite structures have been firstly synthesized by a two-step hydrothermal process. These oxides were crystallized directly from niobium oxide in the presence of potassium basic solutions at 240 °C for 48 h. The products were characterized by powder X-ray diffraction and scanning electron microscopy. It was found that the pretreatment of the niobium oxide through the hydrothermal technique firstly was the critical factor to prepare these niobates. Moreover, the alkaline concentration also played an important role in the formation of these niobates. On basis of the experimental data, a possible reaction process for the formation of A5Nb4O15 (A=Ba, Sr) was proposed. [Copyright &y& Elsevier]

Abstract: Invited for the cover of this issue is the group of Xiao Wang and Xiaobo Wan at the Chinese Academy of Sciences and Jian Pei at the Peking University. The image depicts thiazoloisoindigo as a novel building block that possesses the advantages of both thienoisoindigo (red dragon) and diazaisoindigo (blue dragon). Read the full text of the article at 10.1002/chem.201801432. [ABSTRACT FROM AUTHOR]

A reinvestigation of the title pigment reveals that it is actually alkylated (4H,4′H)-benzopyrazinoisoindigo (Ia-c), which could be considered as the reduced form of benzopyrazinoisoindigo, and hence, it is a good candidate for p-type semiconductors. [ABSTRACT FROM AUTHOR]

The eight papers in this special section were presented at the 27th International Conference on Data Engineering (ICDE 2011) that was held in Hannover, Germany on 11-16 April 2011. [ABSTRACT FROM AUTHOR]

Polymer field‐effect transistors have gone through rapid development. Nevertheless, charge transport mechanism and structure–property relationship are not well understood. On page 6270, J.‐Y. Wang, J. Pei, and co‐workers use strong electron‐deficient benzodifurandione‐based poly(p‐phenylene vinylene) (BDPPV) as the polymer backbone and develop six BDPPV‐based polymers with various side‐chain branching positions to systematically study the side‐chain effect on device performance. [ABSTRACT FROM AUTHOR]

Review: [32 refs. [ABSTRACT FROM AUTHOR]

A large fused pyrene derivative (IV) is easily prepared by fusion at the non-K-region of pyrene for the first time. [ABSTRACT FROM AUTHOR]