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Synthesis and Electrical Properties of Derivatives of 1,4-bis(trialkylsilylethynyl)benzo[2,3‑b:5,6‑b′]diindolizines

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posted on 15.11.2016, 20:05 by Devin B. Granger, Yaochuan Mei, Karl J. Thorley, Sean R. Parkin, Oana D. Jurchescu, John E. Anthony
A new class of nitrogen-containing arene organic semiconductors incorporating fused indolizine units is described. This system, though having a zigzag shape, mimics the electronic properties of its linear analogue pentacene as a result of nitrogen lone pair incorporation into the π-electron system. Solubilizing trialkylsilylethynyl groups were employed to target crystal packing motifs appropriate for field-effect transistor devices. The triethylsilylethynyl derivative yielded hole mobilities of 0.1 cm2 V–1 s–1 and on/off current ratios of 105.