General synthesis method of alkyl-alkoxy multi-fluorotolanes for negative high birefringence nematic mixtures

Convenient new methods for the synthesis of 4'-alkyl-, 4'-alkylcyclohexyl or 4'-alkylphenyl monofluoro-, difluoro- and tetrafluoro-substituted 4-alkoxy- or 4-alkyltolanes are proposed. The temperature and enthalpy of the phase transition for the homologues of the eight series, as well...

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Bibliographic Details
Published in:Liquid crystals 2012-02, Vol.39 (2), p.239-247
Main Authors: Dziaduszek, J., Kula, P., Dąbrowski, R., Drzewiński, W., Garbat, K., Urban, S., Gauza, S.
Format: Article
Language:English
Subjects:
Anisotropy
Birefringence
Chemical synthesis
Dielectrics
fluoro-substituted tolane
high birefringence compound
Homology
liquid crystal
Liquid crystal polymers
Liquid crystals
negative dielectric anisotropy
Nematic
Phase transformations
Phase transitions
Synthesis
Thermodynamics
vertically aligned nematic
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Summary:Convenient new methods for the synthesis of 4'-alkyl-, 4'-alkylcyclohexyl or 4'-alkylphenyl monofluoro-, difluoro- and tetrafluoro-substituted 4-alkoxy- or 4-alkyltolanes are proposed. The temperature and enthalpy of the phase transition for the homologues of the eight series, as well as the examples of the mixtures with negative dielectric anisotropy (Δϵ
ISSN:0267-8292
1366-5855
DOI:10.1080/02678292.2011.636457