Journal
CHEMISTRY-A EUROPEAN JOURNAL
Volume 20, Issue 24, Pages 7232-7235Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/chem.201402288
Keywords
liquid crystals; N-heteroacenes; n-type; self-assembly; semiconductor
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Funding
- Ministry of Education, Culture, Sports, Science, and Technology of Japan [2401, 25102540, 26410099]
- Nippon Sheet Glass Foundation for Materials Science and Engineering
- Futaba Electronics Memorial Foundation
- The Kurata Grant, Kurata Memorial Hitachi Science and Technology Foundation
- Grants-in-Aid for Scientific Research [25620154, 26410099, 25102533, 25102540] Funding Source: KAKEN
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The preparation of two liquid crystals composed of a redox-active tetraazanaphthacene (TANC) framework is reported. The materials form smectic A (SmA) thin-film liquid-crystalline (LC) phases over a wide temperature range. Cyclic voltammetry analysis revealed that LC TANCs behave as organic electron acceptors. The electron mobilities of the thin films were determined by time-of-flight (TOF) measurements, which are the order of 10(-4) cm(2)V(-1) s(-1) in the SmA LC phase. This value is two orders of magnitude larger than those of amorphous organic semiconductors. To the best of our knowledge, very few reports exist on the electron-transporting behaviors of LC N-heteroacene semiconductors.
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