Chiral liquid crystalline (LC) monosubstituted polyacetylene ( mono -PA) copolymers, consisting of an LC acetylene monomer unit and an asymmetric center-containing chiral acetylene monomer unit, have been synthesized. The former has a phenylcyclohexyl (PCH) mesogen linked with a trimethylene spacer, and the latter has an ( R )-/( S )-1-methylpropargyl undecanoate structure. By varying the feed ratio of the acetylene monomers, a facile method for tuning the LC and the chiral functionality in the mono -PA copolymers was developed. The synergistic effects between the LC and the chiral monomer units were employed to enable the chirality transfer from the mono -PA copolymer to the achiral LC conjugated polymer, poly( p -phenylene ethynylene) [LC-PPE]. The utilization of chiral LC mono -PA copolymers for the chirality transfer of LC-PPE is reported, wherein the LC monomer units enhance the interpolymer interactions through increased miscibility in the LC phase, while the chiral monomer units induce chirality in the LC-PPE main chain.
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Jose et al. (2016) studied this question.
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