The orientational order and conformational distributions of the two enantiomers in a racemic mixture of a chiral, flexible molecule dissolved in a chiral nematic liquid crystalline solvent

2004 ◽  
Vol 6 (3) ◽  
pp. 522 ◽  
Author(s):  
James W. Emsley ◽  
Philippe Lesot ◽  
Denis Merlet
Keyword(s):  
Liquid Crystalline ◽  
Orientational Order ◽  
Racemic Mixture ◽  
Flexible Molecule ◽  
Chiral Nematic

scholarly journals Concentric chiral nematic polymeric fibers from cellulose nanocrystals

2021 ◽  
Author(s):  
Arash Momeni ◽  
Christopher M. Walters ◽  
Yi-Tao Xu ◽  
Wadood Y. Hamad ◽  
Mark J. MacLachlan
Keyword(s):  
Cellulose Nanocrystals ◽  
Liquid Crystalline ◽  
Capillary Tube ◽  
Single Domain ◽  
Cellulose Nanocrystal ◽  
Polymeric Fibers ◽  
Chiral Nematic ◽  
Chiral Nematic Structure ◽  
Crystalline Suspension

A cellulose nanocrystal liquid crystalline suspension was mixed with monomers and confined to a capillary tube. After photopolymerization, a fiber with a single-domain concentric chiral nematic structure throughout the length of the fiber was obtained.

PBLG as a versatile liquid crystalline medium for anisotropic NMR data acquisition

2019 ◽  
Vol 55 (30) ◽  
pp. 4327-4330 ◽  
Author(s):  
Ikenna E. Ndukwe ◽  
Xiao Wang ◽  
István Pelczer ◽  
Mikhail Reibarkh ◽  
R. Thomas Williamson ◽  
...  
Keyword(s):  
Data Acquisition ◽  
Nematic Phase ◽  
Liquid Crystalline ◽  
Solvent System ◽  
High Quality ◽  
Nmr Data ◽  
Chiral Nematic ◽  
Liquid Crystalline Medium ◽  
Crystalline Medium

The chiral nematic phase of poly-γ-benzyl-l-glutamate (PBLG) formed in a chloroform–DMSO co-solvent system can be used as a versatile alignment medium for the acquisition of high quality anisotropic NMR data for molecules of varying polarities.

scholarly journals Synthesis and Characterization of Photoluminescence Liquid Crystals Based on Flexible Chain-Bearing Pentafluorinated Bistolanes

Crystals ◽  
2020 ◽  
Vol 10 (7) ◽  
pp. 603
Author(s):  
Shigeyuki Yamada ◽  
Masaya Sato ◽  
Tsutomu Konno
Keyword(s):  
Phase Transition ◽  
Liquid Crystals ◽  
Oxygen Atom ◽  
Liquid Crystalline ◽  
Color Change ◽  
Photophysical Properties ◽  
Structure Property ◽  
Flexible Chain ◽  
Structure Property Relationships ◽  
Chiral Nematic

The liquid-crystalline (LC) and photophysical properties of molecules are very sensitive to their electronic and molecular aggregate structures. Herein, to shed light on the structure–property relationships of pentafluorinated bistolane-based photoluminescence (PL) liquid crystals (PLLCs) previously reported by our group, we synthesized pentafluorinated bistolanes with variable flexible chains and evaluated their LC and photophysical properties. The incorporation of an oxygen atom (to afford a 2-methoxyethoxy unit) or an oxygen atom and a methyl group (to afford a 1-methoxyprop-2-oxy unit) into the flexible butoxy chain significantly decreased the temperature of the crystalline-to-LC phase transition, and a chiral nematic phase comprising helical molecular aggregates was observed for the chiral 1-methoxyprop-2-oxy group–bearing bistolane. The synthesized bistolanes exhibited strong blue PL in both solution and crystalline phases; the featuring PL characteristics were maintained in the LC phase (produced by the crystalline-to-LC phase transition) except for a slight PL color change. Thus, it was concluded that the PL behavior of pentafluorinated bistolanes can be modulated by the choice of a suitable flexible chain, and the obtained insights are believed to facilitate the application of PLLCs in thermosensing PL materials.

Vitrified Chiral−Nematic Liquid Crystalline Films for Selective Reflection and Circular Polarization

1999 ◽  
Vol 11 (6) ◽  
pp. 1590-1596 ◽  
Author(s):  
Dimitris Katsis ◽  
Philip H. M. Chen ◽  
John C. Mastrangelo ◽  
Shaw H. Chen ◽  
Thomas N. Blanton
Keyword(s):  
Circular Polarization ◽  
Liquid Crystalline ◽  
Selective Reflection ◽  
Chiral Nematic ◽  
Crystalline Films
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