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New low polar tolane cholesterics designed for infrared applications
Jakub Herman,Przemysław Kula
RSC Advances Pub Date : 08/31/2016 00:00:00 , DOI:10.1039/C6RA16023A
Abstract

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.

Graphical abstract: New low polar tolane cholesterics designed for infrared applications
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