Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 53, Issue 24, Pages 6159-6162Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201403227
Keywords
acenes; aromaticity; dyes/pigments; fused-ring systems; ring annulation
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Funding
- German Ministry of Education and Research (BMBF) within project POLYTOS in the Leading Edge Cluster Forum Organic Electronics [FKZ: 13N10205]
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Acenes are a traditional class of polycyclic aromatic hydrocarbons (PAHs) which attracted considerable interest during the last decade because of their outstanding p-channel semiconductor properties. More recently, N-heteroacenes have been prepared. These molecules have been shown to be more stable and can exhibit n-channel semiconductor properties. Inspired by these archetype PAHs, we synthesized a novel class of highly persistent azahexacene analogues 3a-d. These molecules are composed of a core of four fused five-membered rings derived from their respective diketopyrrolopyrroles. These new pi-conjugated scaffolds show broad and intense absorption in the visible region and possess low-lying HOMO and LUMO levels, leading to much better stability compared to that of acenes and most heteroacenes.
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