Electro-Optic Switching by Helicene Liquid Crystals

Binary mixtures of the aggregating helicene 1 with dodecane have, at dodecane concentrations >30 vol %, a nematic liquid crystalline phase and, at dodecane concentrations ≲5 vol %, a hexagonal columnar liquid crystalline phase. The helical structure with donor and acceptor groups at opposite ends...

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Bibliographic Details
Published in:Chemistry of materials 2002-02, Vol.14 (2), p.773-776
Main Authors: Nuckolls, Colin, Shao, Renfan, Jang, Won-Gun, Clark, Noel A, Walba, David M, Katz, Thomas J
Format: Article
Language:English
Subjects:
Condensed matter: structure, mechanical and thermal properties
Exact sciences and technology
Physics
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Summary:Binary mixtures of the aggregating helicene 1 with dodecane have, at dodecane concentrations >30 vol %, a nematic liquid crystalline phase and, at dodecane concentrations ≲5 vol %, a hexagonal columnar liquid crystalline phase. The helical structure with donor and acceptor groups at opposite ends gives rise to a molecular dipole moment that is parallel to the helix axis and a positive dielectric anisotropy. Accordingly, the helix axes orient parallel to an applied electric field, providing the basis for electro-optic switching.
ISSN:0897-4756
1520-5002
DOI:10.1021/cm010628o