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Faculty for Biology, Chemistry, and Earth Sciences

Macromolecular Chemistry I:

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Strohriegl, P.; Kreger, K.; Hanft, D.; Sonntag, M.; Setayesh, S.; de Leeuw, D.: Novel star-shaped triphenylamine-based molecular glasses and their use in OFETs, Chemistry of Materials, 17(11), 3031-3039 (2005)
ix novel star-shaped compounds with a triphenylamine core and carbazole or fluorene sidearms have been synthesized by Suzuki cross-coupling. The star-shaped molecules are able to form molecular glasses. They were characterized regarding their thermal, optical, and electrochemical properties. The new compounds were tested as organic semiconductors in solution processed organic field-effect transistors (OFETs). Mobilities of 3 x 10(-4) cm(2)/(V s), high on/off ratios of up to 10(5), and low threshold voltages were obtained. The new materials show very small hysteresis and an exceptionally high stability under ambient conditions.
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