Novel planar chiral dopants with high helical twisting power and structure-dependent functions

2016 ◽  
Vol 4 (40) ◽  
pp. 9576-9580 ◽  
Author(s):  
Jinjie Lu ◽  
Wei Gu ◽  
Jia Wei ◽  
Wei Zhang ◽  
Zhengbiao Zhang ◽  
...  
Keyword(s):  
Liquid Crystals ◽  
Cholesteric Liquid Crystals ◽  
Chiral Dopants ◽  
Helical Twisting Power

Three kinds of novel planar chiral azobenzenophane with high HTP values were synthesized. Then, cholesteric liquid crystals with different screw directions were induced by them successfully. And reversible tuning between orange and green reflection colors was achieved.

Relationship between molecular structures of uniquely designed C2-symmetric axially chiral dopants and their helical twisting properties in cholesteric liquid crystals

2019 ◽  
Vol 7 (8) ◽  
pp. 2225-2231 ◽  
Author(s):  
Daisuke Yoshizawa ◽  
Hiroki Higuchi ◽  
Yasushi Okumura ◽  
Hirotsugu Kikuchi
Keyword(s):  
Liquid Crystal ◽  
Liquid Crystals ◽  
Temperature Dependence ◽  
Molecular Structures ◽  
Positive Temperature ◽  
Cholesteric Liquid Crystals ◽  
Axially Chiral ◽  
Enhanced Properties ◽  
Chiral Dopants ◽  
Helical Twisting Power

9,9′-biphenanthrene-type chiral dopants were newly synthesized for the development of functional liquid crystal (LC) materials with enhanced properties. A cholesteric LC (CLC) with a chiral dopant showed positive temperature dependence of helical twisting power and a CLC with temperature independence was developed by mixing two types of chiral dopants.

scholarly journals Synthesis and Characterization of Novel Bio-Chiral Dopants Obtained from Bio-Betulin Produced by a Fermentation Process

Crystals ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 785
Author(s):  
Veridiana G. Guimarães ◽  
Anastasiia Svanidze ◽  
Tianyi Guo ◽  
Pawan Nepal ◽  
Robert J. Twieg ◽  
...  
Keyword(s):  
Liquid Crystals ◽  
Natural Product ◽  
Fermentation Process ◽  
Synthesis And Characterization ◽  
Cholesteric Liquid Crystals ◽  
And Performance ◽  
Chiral Dopants

Cholesteric liquid crystals are frequently produced by the addition of chiral dopants to achiral nematic hosts. We report here the synthesis and performance of chiral dopants obtained from bio-betulin produced by a fermentation process. An important aspect of this work is to point out that the fermentation process used to obtain the starting materials is much easier and cheaper when carried out in large volumes than isolating it from the natural product. The performance of the dopants obtained from bio-betulin is indistinguishable from those obtained from commercially available synthetic betulin.

scholarly journals Glycomacrocycle-Based Azobenzene Derivatives as Chiral Dopants for Photoresponsive Cholesteric Liquid Crystals

2020 ◽  
Vol 12 (46) ◽  
pp. 52146-52155
Author(s):  
Yuna Kim ◽  
Noushaba Nusrat Mafy ◽  
Stéphane Maisonneuve ◽  
Chaoqi Lin ◽  
Nobuyuki Tamaoki ◽  
...  
Keyword(s):  
Liquid Crystals ◽  
Cholesteric Liquid Crystals ◽  
Chiral Dopants ◽  
Azobenzene Derivatives

Tuning helical twisting power and photoisomerisation kinetics of axially chiral cyclic azobenzene dopants in cholesteric liquid crystals

2019 ◽  
Vol 46 (15) ◽  
pp. 2181-2189 ◽  
Author(s):  
Mengyi Zhou ◽  
Hongbo Lu ◽  
Xinmin Zhang ◽  
Qiang Zhang ◽  
Miao Xu ◽  
...  
Keyword(s):  
Liquid Crystals ◽  
Cholesteric Liquid Crystals ◽  
Axially Chiral ◽  
Kinetics Of ◽  
Helical Twisting Power

Bis-Chelated Imine-Alkoxytitanium Complexes: Novel Chiral Dopants with High Helical Twisting Power in Liquid Crystals

2005 ◽  
Vol 11 (11) ◽  
pp. 3405-3412 ◽  
Author(s):  
Manfred Braun ◽  
Antje Hahn ◽  
Marco Engelmann ◽  
Ralf Fleischer ◽  
Walter Frank ◽  
...  
Keyword(s):  
Liquid Crystals ◽  
Chiral Dopants ◽  
Helical Twisting Power
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