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Proceedings Paper

New 1-aryl-spiro[2,5]octan-4-ones as chiral components of induced short-pitch cholesterics
Author(s): T. G. Drushlyak; I. M. Gella; N. I. Shkolnikova; N. S. Pivnenko; N. B. Novikova; L. A. Kutulya
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Paper Abstract

New 1-(4X-phenyl)-spiro-octan-4-ones (X=F, Cl, Br, C6H5, C6H4C6H4OA1k) were synthesized to use for inducement of the helical supra-molecular structure with a short pitch under addition to the nematic liquid crystal (LC) 4-cyano-4'- pentylbiphenyle (5CB). Design of these spiro-compounds was accomplished by the replacement of a double bond in known chiral dopants of a series of isomenthone arylidene derivatives 1 by the cyclopropane ring that made them stable to photochemical E-Z- isomerization typical of initial enones 1. New dopants 2 exhibit the helical twisting power that only slightly reduced as compare to compounds 1. LC mixtures based on the E-63 nematic and containing the most effective 2 possess visible selective light reflection.

Paper Details

Date Published: 24 May 2007
PDF: 5 pages
Proc. SPIE 6637, XV International Symposium on Advanced Display Technologies, 66370F (24 May 2007); doi: 10.1117/12.742591
Show Author Affiliations
T. G. Drushlyak, STC Institute for Single Crystals (Ukraine)
I. M. Gella, STC Institute for Single Crystals (Ukraine)
N. I. Shkolnikova, STC Institute for Single Crystals (Ukraine)
N. S. Pivnenko, STC Institute for Single Crystals (Ukraine)
N. B. Novikova, STC Institute for Single Crystals (Ukraine)
L. A. Kutulya, STC Institute for Single Crystals (Ukraine)


Published in SPIE Proceedings Vol. 6637:
XV International Symposium on Advanced Display Technologies

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