Optically active, lyotropic liquid crystalline poly(diphenylacetylene) derivative: hierarchical chiral ordering from isotropic solution to anisotropic solid films

2012 ◽  
Vol 48 (74) ◽  
pp. 9275 ◽  
Author(s):  
Daehoon Lee ◽  
Hyojin Kim ◽  
Nozomu Suzuki ◽  
Michiya Fujiki ◽  
Chang-Lyoul Lee ◽  
...  
Keyword(s):  
Liquid Crystalline ◽  
Optically Active ◽  
Isotropic Solution ◽  
Solid Films ◽  
Anisotropic Solid

Synthesis and Helical Conformation of Novel Optically Active Liquid Crystalline Poly(p-phenylene)s Containing Cyanoterphenyl Mesogen as Pendant

2009 ◽  
Vol 42 (14) ◽  
pp. 5053-5061 ◽  
Author(s):  
Lie Chen ◽  
Yiwang Chen ◽  
Kai Yao ◽  
Weihua Zhou ◽  
Fan Li ◽  
...  
Keyword(s):  
Liquid Crystalline ◽  
Optically Active ◽  
Helical Conformation ◽  
Active Liquid

scholarly journals Mechanisms of Chiral Transfer in Optically Active Dopant – Nematic Liquid Crystal Systems

2020 ◽  
Vol 20 (4) ◽  
pp. 6-26
Author(s):  
V. A. Burmistrov ◽  
V. V. Aleksandriiskii ◽  
I. V. Novikov ◽  
O. I. Koifman
Keyword(s):  
Liquid Crystal ◽  
Nematic Liquid Crystal ◽  
Self Assembly ◽  
Liquid Crystalline ◽  
High Efficiency ◽  
Stationary Phases ◽  
Theoretical Description ◽  
Optically Active ◽  
Axial Coordination ◽  
Chiral Dopants

Induction of helical mesophases by incorporating chiral dopants into the nematics matrix is the promising modern trends in the chemistry of liquid crystals. This process is associated with a unique phenomenon - an amplification of chirality in liquid-crystalline phases, which ensures the detection of enantiomers by their chiral induction, much more sensitive than other methods. The relevance of this approach is due to the need to create perspective electro-optical devices operating with ultra-low control voltages based on twist effects, chromatographic stationary phases with high chiral selectivity, flexible magnets, photo-sensitive nanostructures, and other smart LC materials. The successful solution of these problems is impossible without experimental research and theoretical comprehension of the mechanisms of third level chiral transfer optically active dopant – nematic liquid crystal. In the last decade, a large number of works have appeared on the solution of these problems. This review is devoted to a generalization of the experimental results and a theoretical description of the transfer of molecular chirality to orientationally ordered systems with the participation of both chiral molecular substituents with an asymmetric carbon atom and planar or quasi-planar fragments chirally distorted relative to each other. The stereochemical aspects of induction associated with the structural correspondences of the dopant and nematic liquid crystal, as well as the main classes of optically active additives, are discussed. Application of metal complexes, both Werner and macroheterocyclic, are presented. Special attention is paid to the results of the mechanisms study of chiral transfer due to various intermolecular interactions: hydrogen bonding, axial coordination, and the formation of inclusion compounds. The high efficiency of induction of spiral mesophases has been demonstrated with a combination of different self-assembly mechanisms in liquid crystal - chiral additive systems.

Photo-Cross-Linkable and Optically Active Side-Chain Liquid-Crystalline Copolymers

1994 ◽  
Vol 27 (14) ◽  
pp. 3721-3726 ◽  
Author(s):  
L.-C. Chien ◽  
Leonorina G. Cada
Keyword(s):  
Liquid Crystalline ◽  
Optically Active ◽  
Side Chain

Optically Active Elastomers from Liquid Crystalline Comb Copolymers with Dual Physical and Chemical Cross-Links

2017 ◽  
Vol 50 (15) ◽  
pp. 5929-5939 ◽  
Author(s):  
Lalit H. Mahajan ◽  
Dennis Ndaya ◽  
Prashant Deshmukh ◽  
Xiayu Peng ◽  
Manesh Gopinadhan ◽  
...  
Keyword(s):  
Liquid Crystalline ◽  
Optically Active ◽  
Cross Links ◽  
Physical And Chemical

Synthesis and characterization of optically active liquid crystalline polyacrylates containing mesogenic phenylbenzoate groups

Polymer ◽  
2008 ◽  
Vol 49 (18) ◽  
pp. 3938-3949 ◽  
Author(s):  
Jui-Hsiang Liu ◽  
Yu-Kan Wang ◽  
Chien-Chih Chen ◽  
Po-Chih Yang ◽  
Feng-Ming Hsieh ◽  
...  
Keyword(s):  
Liquid Crystalline ◽  
Optically Active ◽  
Synthesis And Characterization ◽  
Active Liquid

Study of Casting Self-Colored Liquid Crystalline Solid Films of Hydroxypropyl Cellulose

2013 ◽  
Vol 341-342 ◽  
pp. 217-220
Author(s):  
Qin Xing Zhang ◽  
Li Qian ◽  
Li Xia Wang ◽  
S. Stuto ◽  
Chang Yu Shen
Keyword(s):  
Visible Light ◽  
Liquid Crystalline ◽  
Solution Concentration ◽  
Hydroxypropyl Cellulose ◽  
Crystalline Solid ◽  
Selective Reflection ◽  
Solid Films ◽  
Colored Coating ◽  
Cooling Velocity ◽  
Cholesteric Liquid Crystalline

Solutions of lyotropic cholesteric liquid crystalline hydroxypropyl cellulose (HPC) in water would be self-colored due to the selective reflection of visible light, depending on the solution concentration. Colored coating of the liquid crystalline aqueous HPC solutions was attempted to apply. HPC solid films were found which could cast from the liquid crystalline solutions at different conditions such as solution concentration and different drying temperature. Experiments show that both solution concentration and cooling velocity play an important effect in controlling the color of HPC films.

scholarly journals Supramolecular Structure, Physical Properties, and Langmuir-Blodgett Film Formation of an Optically Active Liquid-Crystalline Phthalocyanine

1995 ◽  
Vol 1 (3) ◽  
pp. 171-182 ◽  
Author(s):  
Cornelus F. van Nostrum ◽  
Anton W. Bosman ◽  
Gerwin H. Gelinck ◽  
Pieter G. Schouten ◽  
John M. Warman ◽  
...  
Keyword(s):  
Physical Properties ◽  
Supramolecular Structure ◽  
Liquid Crystalline ◽  
Film Formation ◽  
Optically Active ◽  
Blodgett Film ◽  
Langmuir Blodgett ◽  
Active Liquid ◽  
Langmuir Blodgett Film
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