The synthesis, crystal structure and charge-transport properties of hexacene

Acenes can be thought of as one-dimensional strips of graphene and they have the potential to be used in the next generation of electronic devices. However, because acenes larger than pentacene have been found to be unstable, it was generally accepted that they would not be particularly useful mater...

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Published in:Nature chemistry 2012-06, Vol.4 (7), p.574-578
Main Authors: Watanabe, Motonori, Chang, Yuan Jay, Liu, Shun-Wei, Chao, Ting-Han, Goto, Kenta, Islam, Md Minarul, Yuan, Chih-Hsien, Tao, Yu-Tai, Shinmyozu, Teruo, Chow, Tahsin J
Format: Article
Language:English
Subjects:
Chemistry
Crystal structure
Crystallography, X-Ray
Graphite - chemistry
Hydrocarbons, Aromatic - chemistry
Molecular Conformation
Polycyclic Aromatic Hydrocarbons - chemical synthesis
Polycyclic Aromatic Hydrocarbons - chemistry
Quantum Theory
Transistors
Transistors, Electronic
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Summary:Acenes can be thought of as one-dimensional strips of graphene and they have the potential to be used in the next generation of electronic devices. However, because acenes larger than pentacene have been found to be unstable, it was generally accepted that they would not be particularly useful materials under normal conditions. Here, we show that, by using a physical vapour-transport method, platelet-shaped crystals of hexacene can be prepared from a monoketone precursor. These crystals are stable in the dark for a long period of time under ambient conditions. In the crystal, the molecules are arranged in herringbone arrays, quite similar to that observed for pentacene. A field-effect transistor made using a single crystal of hexacene displayed a hole mobility significantly higher than that of pentacene. This result suggests that it might be instructive to further explore the potential of other higher acenes.
ISSN:1755-4330
1755-4349
DOI:10.1038/nchem.1381