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New 2,2'-Substituted 6,6'-Dimethylbiphenyl Derivatives Inducing Strong Helical Twisting Power in Liquid Crystals

✍ Scribed by Richard Holzwarth; Richard Bartsch; Zoubair Cherkaoui; Guy Solladié

Publisher
John Wiley and Sons
Year
2005
Tongue
English
Weight
106 KB
Volume
2005
Category
Article
ISSN
1434-193X

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✦ Synopsis

Abstract

New optically active tetra‐ortho‐substituted biphenyl chiral dopants for nematic liquid crystals are described. It was shown, with respect to our previous results, that biphenyl chiral dopants bearing only mesogenic residues on their 2,2'‐positions and without any substituents on their 4,4'‐positions gave rise to very high twisting powers in nematic liquid crystals. This powerful and unconventional chiral dopant molecular architecture allowed the design of new tetra‐ortho‐substituted biphenyl derivatives, easier to prepare in optically active form. This simplification of the molecular architecture still affords chiral dopants for nematic liquid crystals with large helical twisting powers and allows more economical large‐scale preparation. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2005)

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New 2,2′-Substituted 4,4′-Dimethoxy-6,6′-dimethyl[1,1′-biphenyls], Inducing a Strong Helical Twisting Power in Liquid Crystals
✍ Richard Holzwarth; Richard Bartsch; Zoubair Cherkaoui; Guy Solladié 📂 Article 📅 2004 🏛 John Wiley and Sons 🌐 English ⚖ 157 KB

## Abstract Based on the stabilisation of the molecular motion by the chiral residue, novel optically active biphenylic chiral dopants for nematic liquid crystals were developed. This molecular congestion was obtained by introducing mesogenic residues on the 2,2′‐positions of the chiral biphenyl; t