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 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.
Institute of Chemistry, Academia Sinica, No. 128, Academia Road Sec 2, Nankang, Taipei, 11529, Taiwan.
Motonori
M
Watanabe
Yuan Jay
YJ
Chang
Shun-Wei
SW
Liu
Ting-Han
TH
Chao
Kenta
K
Goto
Md Minarul
MM
Islam
Chih-Hsien
CH
Yuan
Yu-Tai
YT
Tao
Teruo
T
Shinmyozu
Tahsin J
TJ
Chow
D018360:Crystallography, X-Ray; D006108:Graphite / Q000737:chemistry; D006841:Hydrocarbons, Aromatic / Q000737:chemistry*; D008968:Molecular Conformation; D011084:Polycyclic Aromatic Hydrocarbons / Q000138:chemical synthesis / Q000737:chemistry*; D011789:Quantum Theory; D014173:Transistors, Electronic
D006841:Hydrocarbons, Aromatic; D011084:Polycyclic Aromatic Hydrocarbons; D006108:Graphite