Atropenantiomers of novel 1,1'-binaphthyl derivatives: synthesis and use for cholesteric structure induction in low molecular mass and polymer nematics

I. O. Kalinovskii; V. I. Mastshenko; R. A. Vinokur; Natalia I. Boiko; Peter V. Shibaev; Valery P. Shibaev

doi:10.1117/12.301265

1 January 1998 Atropenantiomers of novel 1,1'-binaphthyl derivatives: synthesis and use for cholesteric structure induction in low molecular mass and polymer nematics

I. O. Kalinovskii, V. I. Mastshenko, R. A. Vinokur, Natalia I. Boiko, Peter V. Shibaev, Valery P. Shibaev

Author Affiliations +

Proceedings Volume 3319, Liquid Crystals: Chemistry and Structure; (1998) https://doi.org/10.1117/12.301265
Event: Liquid Crystals, 1997, Zakopane, Poland

Abstract

The synthetic pathways of preparation of new optically active 1,1-binaphthyl (BN) derivatives containing various radicals including mesogenic ones were suggested and realized. No mesophase was found, but having atropisomeric chirality origin the novel substances proved to be effective chiral dopants inducing the highly twisted supramolecular structure both in low molecular mass and in polymer liquid crystals (LC). The helical twisting power (HTP) in two different standard nematic mixtures and in the copolymers based on the nematogenic methoxy-phenyl benzoate acrylic monomer was investigated. The systematic growth of the HTP in the low molecular mass nematics was found when the longer or mesogenic radicals were attached to the binaphthyl core. In the LC-copolymers the HTP of the BN-monomer and mesophase stability were analyzed depending on temperature and the molar fraction of the BN-fragments. The observed HTP value was found to be about thrice as much as those reported for the cholesterol and binaphthyl chiral monomers.

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I. O. Kalinovskii, V. I. Mastshenko, R. A. Vinokur, Natalia I. Boiko, Peter V. Shibaev, and Valery P. Shibaev "Atropenantiomers of novel 1,1'-binaphthyl derivatives: synthesis and use for cholesteric structure induction in low molecular mass and polymer nematics", Proc. SPIE 3319, Liquid Crystals: Chemistry and Structure, (1 January 1998); https://doi.org/10.1117/12.301265

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