From the Molecular Structure to Spectroscopic and Material Properties: Computational Investigation of a Bent-Core Nematic Liquid Crystal

ChemPhysChem ◽  
2014 ◽  
Vol 15 (7) ◽  
pp. 1336-1344 ◽  
Author(s):  
Cristina Greco ◽  
Alberto Marini ◽  
Elisa Frezza ◽  
Alberta Ferrarini
Keyword(s):  
Molecular Structure ◽  
Liquid Crystal ◽  
Nematic Liquid Crystal ◽  
Material Properties ◽  
Computational Investigation

scholarly journals Effect of material properties on reverse flow in nematic liquid crystal devices with homeotropic alignment

2009 ◽  
Vol 95 (15) ◽  
pp. 151108 ◽  
Author(s):  
Pieter J. M. Vanbrabant ◽  
Jeroen Beeckman ◽  
Kristiaan Neyts ◽  
Richard James ◽  
F. Anibal Fernandez
Keyword(s):  
Liquid Crystal ◽  
Nematic Liquid Crystal ◽  
Material Properties ◽  
Reverse Flow ◽  
Liquid Crystal Devices ◽  
Homeotropic Alignment

scholarly journals Electrorheological Effect of Gold Nanoparticles Coated with Fluorescent Mesogenic Groups Dispersed in Nematic Liquid Crystal

Crystals ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 192
Author(s):  
Kosuke Kaneko ◽  
Kosuke Yamashita ◽  
Daiki Fujioka ◽  
Kimiyoshi Kaneko ◽  
Kiyomi Fuchigami ◽  
...  
Keyword(s):  
Molecular Structure ◽  
Gold Nanoparticles ◽  
Liquid Crystal ◽  
Composite Materials ◽  
Nematic Liquid Crystal ◽  
Material Design ◽  
Alkyl Chains ◽  
Simple Strategy ◽  
Electrorheological Effect ◽  
Surface Modified

The electrorheological (ER) properties of composite materials consisting of a nematic liquid crystal (LC) and gold nanoparticles (GNPs) coated with bistolane-based mesogenic groups were studied. The GNPs were coated by normal alkyl chains and the fluorescent LC compounds, of which the molecular structure was similar to that of the LC matrix. The dispersity of the GNPs in the nematic LC was investigated by polarizing optical microscopy (POM). In order to improve the ER effect of the composite, a simple strategy was investigated from the viewpoint of a material design in surface-modified GNPs by lateral substitution of the mesogenic groups. The presence of the GNPs in the nematic LC led to a slightly enhanced ER effect compared to that observed for only the nematic LC. This study demonstrates the potential of a hybrid system consisting of LCs and GNPs to yield a larger ER effect.

scholarly journals The Molecular Structure of 2,5-Dihydrofuran from the Analysis of the Nematic Liquid Crystal Nuclear Magnetic Resonance Spectrum

1974 ◽  
Vol 52 (2) ◽  
pp. 281-286 ◽  
Author(s):  
K. C. Cole ◽  
D. F. R. Gilson
Keyword(s):  
Molecular Structure ◽  
Nuclear Magnetic Resonance ◽  
Liquid Crystal ◽  
Magnetic Resonance ◽  
Nuclear Magnetic Resonance Spectrum ◽  
Nematic Liquid Crystal ◽  
Nematic Phase ◽  
Resonance Spectrum ◽  
Coupling Constants ◽  
Ring Puckering

The nematic phase n.m.r. spectrum of partially oriented 2,5-dihydrofuran has been analyzed. Corrections to the structure for ring puckering and methylene rocking motions, according to the model due to Malloy, give improved agreement between experimental and calculated direct dipole–dipole coupling constants.

scholarly journals Polymer–Nematic Liquid Crystal Interface: On the Role of the Liquid Crystalline Molecular Structure and the Phase Sequence in Photoalignment

Polymers ◽  
2021 ◽  
Vol 13 (2) ◽  
pp. 193
Author(s):  
Ameer R. K. Nassrah ◽  
István Jánossy ◽  
Viktor Kenderesi ◽  
Tibor Tóth-Katona
Keyword(s):  
Molecular Structure ◽  
Liquid Crystal ◽  
Nematic Liquid Crystal ◽  
Conformational Changes ◽  
Liquid Crystalline ◽  
Three Dimensions ◽  
Phase Sequence ◽  
Photosensitive Polymer ◽  
Experimental Findings

We provide experimental evidence for the influence of the molecular structure of the nematic liquid crystal (NLC) on the photoalignment process in three dimensions at the interface with a polymer layer. In particular, the experimental findings are explained through the presence (or absence) of the π−π aromatic interactions between the NLC and the polymer. The influence of the nematic-to-smectic A phase transition on the photocontrol is also addressed. Furthermore, we demonstrate that the photo-induced reorientation scenarios can be eventually connected to conformational changes in the photosensitive polymer.

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