New low polar tolane cholesterics designed for infrared applications

We have designed, synthesized and evaluated the physical properties of new fluorinated phenyltolane based chiral liquid crystal materials with 2-methylbutyl terminal chain. The 2- or 2,6-fluorosubstitution in combination with the phenyltolane core brings surprising improvement of mesomorphic propert...

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Bibliographic Details
Published inRSC advances Vol. 6; no. 87; pp. 84231 - 84235
Main Authors Herman, Jakub, Kula, Przemys aw
Format Journal Article
LanguageEnglish
Published 01.01.2016
Subjects
Chains
Infrared
Liquid crystals
Melting
Physical properties
Reflection
Terminals
Twisting
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Summary:We have designed, synthesized and evaluated the physical properties of new fluorinated phenyltolane based chiral liquid crystal materials with 2-methylbutyl terminal chain. The 2- or 2,6-fluorosubstitution in combination with the phenyltolane core brings surprising improvement of mesomorphic properties. The investigated compounds are characterized by a broad temperature range of the cholesteric (chiral nematic N*) phase, very low melting temperatures and easy thermal control of selective reflection in the near infrared region. The moderate helical twisting power β , high optical anisotropy and source of a blue phase make these compounds attractive for cholesteric mixture formulations. We have designed, synthesized and evaluated the physical properties of new fluorinated phenyltolane based chiral liquid crystal materials with 2-methylbutyl terminal chain.
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ISSN:2046-2069
2046-2069
DOI:10.1039/c6ra16023a