Cover Picture: A Crystal-Engineered Hydrogen-Bonded Octachloroperylene Diimide with a Twisted Core: An n-Channel Organic Semiconductor (Angew. Chem. Int. Ed. 4/2010)



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Molecular and crystal engineering rendered high-performance organic thin-film transistors (TFTs) based on a highly electron-poor octachloroperylene diimide (Cl8-PTCDI). In their Communication on page 740 ff., F. Würthner, Z. Bao, and co-workers report an intriguing supramolecular crystal engineering concept that directs two-dimensional π–π-stacked percolation paths for electron transport and affords TFTs with excellent mobilities and on-to-off current ratios under atmospheric conditions.