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Synthesis of New Chiral Disubstituted Binaphthol Derivatives and their use as the Chiral Dopants

Published online by Cambridge University Press:  10 February 2011

H.-J. Deussen ,
P. V. Shibaev ,
R. A. Vinokur ,
K. Schaumburg ,
T. Bjornholm ,
K. Bechgaard  and
V. P. Shibaev
H.-J. Deussen
Affiliation:
CISMI, Department of Chemistry, University of Copenhagen, SYMBION Science Park, Fruebjergvej 3, DK-2100, Copenhagen ø, Denmark
P. V. Shibaev
Affiliation:
Moscow State University, Physical and Chemical Departments, 119899 Moscow, Russia
R. A. Vinokur
Affiliation:
Moscow State University, Physical and Chemical Departments, 119899 Moscow, Russia
K. Schaumburg
Affiliation:
CISMI, Department of Chemistry, University of Copenhagen, SYMBION Science Park, Fruebjergvej 3, DK-2100, Copenhagen ø, Denmark
T. Bjornholm
Affiliation:
CISMI, Department of Chemistry, University of Copenhagen, SYMBION Science Park, Fruebjergvej 3, DK-2100, Copenhagen ø, Denmark
K. Bechgaard
Affiliation:
RISø, Department of Solid States Phyiscs, DK-4000 Roskilde, Denmark
V. P. Shibaev
Affiliation:
Moscow State University, Physical and Chemical Departments, 119899 Moscow, Russia
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Abstract

A number of new chiral binaphthol (BN) derivatives with different substituents in the 6,6'-positions in open and bridged forms have been synthesized. Their possible liquid crystalline properties and their helical twisting power (B) of three different nematic liquid crystals (LCs) were investigated. Derivatives with spatially extended substituents in the 6,6'-positions (e.g. styryl or vinil) show unusual high helical twisting power (up to 120 μm–1). A direct correlation between the magnitude of β and the length of the substituents was found.

From the different temperature dependence of β of the open and bridged BNs, a molecular model was developed relating the molecular conformation and twisting power

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 425: Symposium I – Liquid Crystals for Advanced Technologies , 1996 , 55
Copyright
Copyright © Materials Research Society 1996

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