The synthesis of chiral fluorinated 4-alkyl-4′-[(4-alkylphenyl)ethynyl]biphenyls
作者:Jakub Herman、Przemysław Kula
DOI:10.1016/j.tetlet.2013.04.118
日期:2013.7
We have designed, synthesized, and evaluated the physical properties of new fluorinated phenyltolane based chiral liquid crystal materials with 2-methylbutyl chains. This type of fluoro-substitution in chemical combination with a phenyltolane core brings a surprising improvement to the mesomorphic properties. The investigated compounds exhibit broad temperature ranges for the N* phase and very low melting points. All homologues exhibited Blue Phase. We have applied a Cu-catalyzed cross-coupling reaction between aryl Grignard reagents and alkyl bromides for the synthesis of the products. (C) 2013 Elsevier Ltd. All rights reserved.
New low polar tolane cholesterics designed for infrared applications
作者:Jakub Herman、Przemysław Kula
DOI:10.1039/c6ra16023a
日期:——
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