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30 May 2001 New chiral E and Z isomers of the 1R,4R-2-arylidene-p-menthane-3-ones in induced cholesteric and ferroelectric liquid crystals
Lidiya A. Kutulya, V. V. Vashchenko, A. O. Doroshenko, Mikhail N. Pivnenko, L. V. Chepeleva, N. S. Pivnenko, Natalya I. Shkolnikova
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Proceedings Volume 4418, Eighth International Conference on Nonlinear Optics of Liquid and Photorefractive Crystals; 44180F (2001) https://doi.org/10.1117/12.428299
Event: Eighth International Conference on Nonlinear Optics of Liquid and Photorefractive Crystals, 2000, Alushta, Crimea, Ukraine
Abstract
A novel pair of the E- and Z-isomeric 1R,4R-2-)4- heptyloxyphenyl)-benzylidene-p-menthan-3-ones has been prepared and the influence of distinctions in their molecular geometry on macroscopic properties of liquid crystal systems with the induced supra-molecular helical structure has been studied. The significantly lower helical twisting power of the chiral Z-isomer in comparison with that of E- one has been confirmed in the case of induced cholesteric systems based on 4-pentyl-4-cyanobiphenyl. The phase behavior and ferroelectric characteristics have been investigated for smectic-C* compositions based on the eutectic mixture of the homological 4-hexyloxyphenyl-4'- hexyloxy- and 4-hexyloxyphenyl-4'-octyloxybenzoates containing the novel isomeric chiral dopants. The spontaneous polarization of the opposite signs induced by the isomeric chiral components has been revealed for the compositions studied. Distinctions in phase states, absolute values of the spontaneous polarization, smectic tilt angle and rotation viscosity of the systems obtained are discussed.
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Lidiya A. Kutulya, V. V. Vashchenko, A. O. Doroshenko, Mikhail N. Pivnenko, L. V. Chepeleva, N. S. Pivnenko, and Natalya I. Shkolnikova "New chiral E and Z isomers of the 1R,4R-2-arylidene-p-menthane-3-ones in induced cholesteric and ferroelectric liquid crystals", Proc. SPIE 4418, Eighth International Conference on Nonlinear Optics of Liquid and Photorefractive Crystals, 44180F (30 May 2001); https://doi.org/10.1117/12.428299
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KEYWORDS
Ferroelectric LCDs
Polarization
Liquid crystals
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