- Alkoxy Hydrosilanes As Surrogates of Gaseous Silanes for Hydrosilylation of Alkenes
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Me2SiH2, MeSiH3, and SiH4 are gaseous and flammable silanes that are inconvenient to use in chemical reactions. Catalytic amounts of a nickel pincer complex and NaOtBu are reported to allow the synthesis of alkyl hydrosilanes from alkenes and alkoxy hydrosilanes, leading to the replacement of Me2SiH2, MeSiH3, and SiH4 by Me2(MeO)SiH, Me(EtO)2SiH, and (MeO)3SiH in hydrosilylation reactions of alkenes. The scope and mechanism of the reactions are also described.
- Buslov, Ivan,Keller, Sébastien Carlos,Hu, Xile
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supporting information
p. 1928 - 1931
(2016/05/19)
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- Trialkylsilylethynyl-substituted triphenylenes and hexabenzocoronenes: Highly soluble liquid crystalline materials and their hole transport abilities
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Four triphenylene (TP) and four hexa-peri-hexabenzocoronene (HBC) derivatives with trialkylsilylethynyl groups were prepared and characterized by differential scanning calorimetry, polarizing optical microscopy, and X-ray diffraction measurements. All compounds were highly soluble in less-polar organic solvents and exhibited a columnar phase, Colh or Colr for the TPs, and Colh for the HBCs. The hole transport ability in the HBCs' columnar phase, 0.4-1.5×10-3 cm2 V-1 s-1 at 40-180°C, and its temperature dependence were determined by the time-of-flight method using a solution technique.
- Hirose, Takuji,Miyazaki, Yutaro,Watabe, Mizuki,Akimoto, Sho,Tachikawa, Tatsuya,Kodama, Koichi,Yasutake, Mikio
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supporting information
p. 4714 - 4721
(2015/07/27)
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- Predictability of thermal and electrical properties of end-capped oligothiophenes by a simple bulkiness parameter
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The branching topology of end groups attached to several series of oligothiophenes has a systematic effect on thermal and electrical properties of the oligomers. The series were synthesized in a modular approach and show a distinct drop of the melting point Tm on increasing bulkiness of the substituents. The same trend can be found for the dissociation temperatures Tdis of aggregates in solution. Similarly, monolayer OFET mobilities μFET are significantly decreasing with increasing bulkiness of the substituents. A simple geometric model is presented quantitatively correlating the transition temperatures and mobilities with the substituents' structure based on a bulkiness parameter P, which allows predicting Tm, T dis, and μFET of corresponding not yet synthesized oligomers with branched substituents. This model might be generally applicable for end-capped rod-like conjugated oligomers.
- Kreyes, Andreas,Mourran, Ahmed,Hong, Zhihua,Wang, Jingbo,Moeller, Martin,Gholamrezaie, Fatemeh,Roelofs, W. S. Christian,De Leeuw, Dago M.,Ziener, Ulrich
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p. 2128 - 2136
(2013/07/27)
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