Results 191 to 200 of about 9,384 (233)

A new functionalization strategy for pentacene

Chemical Communications, 2007
Functionalization of the pro-cata positions of pentacene with groups held perpendicular to the aromatic plane, in this case through a rigid 1,3-dioxole unit, yields pentacene derivatives that are stable and soluble, and still maintain edge-to-face interactions in the solid state.
John E, Anthony, Johannes, Gierschner, Chad A, Landis, Sean R, Parkin, Jes B, Sherman, Ronald C, Bakus Ii   +5 more
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Pentacene Films on Cu(119)

Langmuir, 2010
The molecular structure of thin pentacene film grown on a Cu(119) surface has been studied by near-edge X-ray absorption fine structure spectroscopy and scanning tunneling microscopy. The interaction between the π-molecular orbitals delocalized on the aromatic rings and the underlying copper substrate was deduced from XAS spectra.
Annese E, Vobornik I, Rossi G, Fujii J
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Synthesis, characterization of the pentacene and fabrication of pentacene field-effect transistors

Chinese Physics B, 2008
A comprehensive understanding of the organic semiconductor material pentacene is meaningful for organic field-effect transistors (OFETs). Thin films of pentacene are the most mobile molecular films known to date. This paper reported that the pentacene sample was successfully synthesized. The purity of pentacene is up to 95%.
Tao Chun-Lan, Zhang Xu-Hui, Dong Mao-Jun, Liu Yi-Yang, Sun Shuo, Ou Gu-Ping, Zhang Fu-Jia, Zhang Hao-Li   +7 more
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Pentacene based Onsager crosses

Chemical Communications, 2016
A dearomatization/aromatization strategy accesses two pentacene based molecular caltrops with improved solubility and film forming properties.
F L, Geyer, S, Schmid, V, Brosius, N M, Bojanowski, G, Bollmann, K, Brödner, U H F, Bunz   +6 more
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A soluble pentacene: synthesis, EPR and electrochemical studies of 2,3,9,10-tetrakis(trimethylsilyl)pentacene

Chemical Communications, 2005
AbstractFor Abstract see ChemInform Abstract in Full Text.
Siu Hin, Chan, Hung Kay, Lee, Yu Man, Wang, Nan Yan, Fu, Xiao Ming, Chen, Zong Wei, Cai, Henry N C, Wong   +6 more
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Exploring Electronically Polarized Pentacenes

Organic Letters, 2008
Unsymmetrically functionalized pentacenes with electron-rich and/or -poor substituents at the 6- and 13-positions were synthesized. The electronic influence was evaluated by solution-state UV-vis absorption and emission spectroscopies. These materials exhibit good solubility in common organic solvents and are stable in the presence of air and water.
Dan, Lehnherr, Robert, McDonald, Rik R, Tykwinski   +2 more
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Photochemical Stability of Pentacene and a Substituted Pentacene in Solution and in Thin Films

Chemistry of Materials, 2004
The organic semiconductor pentacene (1) has shown the highest field effect mobilities in thin films of any organic semiconductor, yet suffers from instability toward oxidation. 6,13-Bis(triisopropylsilylethynyl)pentacene (2) has been reported as an interesting functionalized pentacene which is soluble in common organic solvents and exhibits high ...
Ashok Maliakal, Krishnan Raghavachari, Howard Katz, Edwin Chandross, Theo Siegrist   +4 more
openaire   +1 more source

Toward the peri‐Pentacene Framework

Chemistry – A European Journal, 2013
AbstractBased on modern pyrene chemistry, a new route toward the synthesis of the peri‐pentacene framework was developed. Firstly, the tetraketo form as stable precursor was targeted, because the fully aromatic peri‐pentacene is predicted to suffer from high instability and reactivity.
Zöphel, L., Berger, R., Gao, P., Enkelmann, V., Baumgarten, M., Wagner, M., Müllen, K.   +6 more
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Exploring the polymorphism of crystalline pentacene

Organic Electronics, 2004
Abstract Starting from each of the five complete X-ray structures published so far for crystalline pentacene, we have computed the structures of minimum potential energy, and obtained two local minima of the potential energy, i.e., two different “inherent structures” of mechanical equilibrium.
DELLA VALLE, RAFFAELE GUIDO, BRILLANTE, ALDO, VENUTI, ELISABETTA, L. Farina, A. Girlando, M. Masino   +5 more
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Photochemical Formation of Substituted Pentacenes

The Journal of Organic Chemistry, 2008
Substituted pentacenes (8a, 8b, 14a, and 14b) were prepared by Strating-Zwanenburg photodecarbonylation of diones (7a, 7b, 13a, and 13b). The compounds are red and stable in the solid state under inert atmosphere as well as in degassed solutions, but not in air.
Yuewei, Zhao, Rajib, Mondal, Douglas C, Neckers   +2 more
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