Detail of "7511-49-1"

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Star-shaped oligothiophenes for solution-processible organic field-effect transistors

Star-shaped oligothiophenes for solution-processible organic field-effect transistors. Ponomarenko, Sergei A.; Kirchmeyer, Stephan; Elschner, Andreas; Huisman, Bart-Hendrik; Karbach, Alexander; Drechsler, Doris (Central Research and Development Division, Research Electronic Chemicals, Leverkusen D-51368, Germany). Advanced Functional Materials, 13(8), 591-596 (English) 2003 Wiley-VCH Verlag GmbH & Co. KGaA. CODEN: AFMDC6. ISSN: 1616-301X.Some commonly used reagents like 7511-49-1 and 188918-00-5 are used in this experiment. DOCUMENT TYPE: Journal CA Section: 76 (Electric Phenomena) Section cross-reference(s): 35, 38 The authors have designed and successfully synthesized star-shaped oligothiophenes, which could be used as semiconducting materials for soln.-processible org. field-effect transistors (FETs). By systematically changing the chem. structure of the star-shaped oligothiophenes the authors obtained the structural requirements needed for making working FETs from them. UV-visible fluorescence measurements showed that a mol. of the star-shaped compds. under consideration is not a fully conjugated mol., but it has three independently conjugated oligothienyl-phenylene blocks. A possible scheme of mol. packing of the star-shaped oligothiophenes in a lamellar structure is proposed and confirmed by at. force microscopy (AFM) and XRD measurements. Although the star-shaped semiconductors show a somewhat lower mobility than their linear analogs, they possess better soly. and film-forming properties, leading to improved spin-coating processing. The best FETs were made by spin-coating 1,3,5-tris(5''-decyl-2,2':5',2''-terthien-5-yl)benzene from a CHCl3 soln., which resulted in a mobility of 2 ′ 10-4 cm2V-1s-1, a 102 on/off ratio at gate voltages of 0 V and -20 V, and a threshold voltage close to 0 V. .

Efficient intermolecular [2 + 2 + 2] alkyne cyclotrimerization in aqueous medium using a ruthenium(IV) precatalyst

Cadierno, Victorio; Garcia-Garrido, Sergio E.; Gimeno, Jose ( Departamento de Quimica Organica e Inorganica, Instituto Universitario de Quimica Organometalica "Enrique Moles", Universidad de Oviedo, Oviedo E-33006, Spain). Journal of the American Chemical Society, 128(47), 15094-15095 (English) 2006 American Chemical Society. CODEN: JACSAT. ISSN: 0002-7863. DOCUMENT TYPE: Journal CA Section: 25 (Benzene, Its Derivatives, and Condensed Benzenoid Compounds) The dimeric bis(allyl)-ruthenium(IV) complex [{Ru(h3:h3-C10H16)(m-Cl)Cl}2] (C10H16 = 2,7-dimethylocta-2,6-diene-1,8-diyl) was found to efficiently catalyze the [2 + 2 + 2]-cyclotrimerization of terminal and internal alkynes in aq.Several substances with their cas registry numbers 34801-97-3 and 7511-49-1 may be metioned in this study. medium. Using this method, trisubstituted and hexasubstituted benzene derivs. were obtained in good yields. .