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Proceedings Paper

Atropenantiomers of novel 1,1'-binaphthyl derivatives: synthesis and use for cholesteric structure induction in low molecular mass and polymer nematics
Author(s): I. O. Kalinovskii; V. I. Mastshenko; R. A. Vinokur; Natalia I. Boiko; Peter V. Shibaev; Valery P. Shibaev
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Paper 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.

Paper Details

Date Published: 1 January 1998
PDF: 4 pages
Proc. SPIE 3319, Liquid Crystals: Chemistry and Structure, (1 January 1998); doi: 10.1117/12.301265
Show Author Affiliations
I. O. Kalinovskii, Moscow State Univ. (Russia)
V. I. Mastshenko, Moscow State Univ. (Russia)
R. A. Vinokur, Moscow State Univ. (Russia)
Natalia I. Boiko, Moscow State Univ. (Russia)
Peter V. Shibaev, Moscow State Univ. (United States)
Valery P. Shibaev, Moscow State Univ. (Russia)

Published in SPIE Proceedings Vol. 3319:
Liquid Crystals: Chemistry and Structure
Marzena Tykarska; Roman S. Dabrowski; Jerzy Zielinski, Editor(s)

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