Cover Picture: Liquid-Crystalline Rigid-Core Semiconductor Oligothiophenes: Influence of Molecular Structure on Phase Behaviour and Thin-Film Properties (Chem. Eur. J. 36/2007)
✍ Scribed by Manuela Melucci; Laura Favaretto; Christian Bettini; Massimo Gazzano; Nadia Camaioni; Piera Maccagnani; Paolo Ostoja; Magda Monari; Giovanna Barbarella
- Publisher
- John Wiley and Sons
- Year
- 2007
- Tongue
- English
- Weight
- 431 KB
- Volume
- 13
- Category
- Article
- ISSN
- 0947-6539
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✦ Synopsis
… in oligothiophenes was achieved by M. Melucci and co-workers (see p. 10046 ff.) by applying a new design-strategy based on the insertion of a rigid inner core, such as dithienothiophene, benzothiadiazole, or carbazole, and hexyl chains as ends. Oligomers of different size and shape were synthesized by a highly efficient microwave-assisted protocol. Most of the newly synthesized materials showed ordered smectic mesophases and maintained the smectic order by slow cooling to room temperature. Semiconducting behavior in field-effect transistors from cast and vacuum-evaporated films was demonstrated.