Chiral Nematic Liquid Crystals: The Synthesis of Chiral Nematic Liquid Crystals

Booth, Christopher J.; Demus, D.; Goodby, John W.; Gray, G. W.; Spieß, Hans Wolfgang; Vill, V.

doi:10.1002/9783527620555.ch4a

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2005

2022

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Cited by 2 publications

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“…The chiral diepoxides 4 , 8 and 10 were prepared for the copolymerisation with the nematic diepoxide 1 . Cholesteric phases are formed if chiral compounds are added to a compound forming a nematic phase 23. To affect the formation of the liquid crystalline phase as less as possible chiral epoxides with a structural element similar to the structure of the nematic compound were selected.…”

Section: Resultsmentioning

confidence: 99%

Preparation and Properties of Cholesteric Network Polymers Based on Liquid Crystalline Epoxides

Hartwig

Mahato

Kaese

et al. 2005

Macro Chemistry & Physics

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Summary: Polyether network polymers with cholesteric superstructure are formed by the photochemically induced cationic copolymerisation of a nematic diepoxide with chiral epoxides. If a cholesteric superstructure is formed or not, depends on the temperature at which the photopolymerisation is carried out. The storage modulus is higher above TG in samples with cholesteric superstructure. Optical rotations and vibrational circular dichroism spectra (VCD) depend strongly on the surface state of the substrates. From the VCD spectra it is concluded that the copolymerisation leads to different superstructures depending on the rub directions of the substrates.

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Section: Resultsmentioning

confidence: 99%