Enhanced Hole-Transporting Behavior of Discotic Liquid-Crystalline Physical Gels

Discotic liquid‐crystalline (LC) physical gels have been prepared by combining the self‐assembled fibers of a low‐molecular‐weight gelator and semiconducting LC triphenylene derivatives. The hole mobilities of the discotic LC physical gels measured by a time‐of‐flight method become higher than those...

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Bibliographic Details
Published in:Advanced functional materials 2008-06, Vol.18 (11), p.1668-1675
Main Authors: Hirai, Yuki, Monobe, Hirosato, Mizoshita, Norihiro, Moriyama, Masaya, Hanabusa, Kenji, Shimizu, Yo, Kato, Takashi
Format: Article
Language:English
Subjects:
fibers
hole transport
liquid crystals
photoconductivity
self-assembly
supramolecular materials
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Summary:Discotic liquid‐crystalline (LC) physical gels have been prepared by combining the self‐assembled fibers of a low‐molecular‐weight gelator and semiconducting LC triphenylene derivatives. The hole mobilities of the discotic LC physical gels measured by a time‐of‐flight method become higher than those of LC triphenylenes alone. The introduction of the finely dispersed networks of the gelator in the hexagonal columnar phases may affect the molecular dynamics of the liquid crystals, resulting in the enhancement of hole transporting behavior in the LC gel state. Discotic liquid‐crystalline physical gels (see figure) that exhibit enhanced hole‐transporting behavior are prepared by a molecular self‐organizing process of semiconducting triphenylene derivatives and a hydrogen‐bonded gelator derived from L‐valine. The construction of self‐organized LC composites with well‐controlled microphase‐separated structures is a promising approach to the preparation of highly functional organic materials.
ISSN:1616-301X
1616-3028
DOI:10.1002/adfm.200701313