scholarly journals From metallic cluster-based ceramics to nematic hybrid liquid crystals: a double supramolecular approach

2015 ◽  
Vol 51 (18) ◽  
pp. 3774-3777 ◽  
Author(s):  
Susanta K. Nayak ◽  
Maria Amela-Cortes ◽  
Claire Roiland ◽  
Stéphane Cordier ◽  
Yann Molard
Keyword(s):  
Liquid Crystals ◽  
Electrostatic Interactions ◽  
Liquid Crystalline ◽  
Crystalline Material ◽  
Metallic Cluster ◽  
Inorganic Species ◽  
Liquid Crystalline Material

Luminescent bulky anionic inorganic species are directly integrated in a liquid crystalline material by a double supramolecular approach combining host–guest and electrostatic interactions.

Nematic-to-columnar mesophase transition by in situ supramolecular polymerization

Science ◽  
2019 ◽  
Vol 363 (6423) ◽  
pp. 161-165 ◽  
Author(s):  
Keiichi Yano ◽  
Yoshimitsu Itoh ◽  
Fumito Araoka ◽  
Go Watanabe ◽  
Takaaki Hikima ◽  
...  
Keyword(s):  
Liquid Crystals ◽  
Electric Field ◽  
Applied Electric Field ◽  
Liquid Crystalline ◽  
Crystalline Material ◽  
Core Shell ◽  
Condensed Phases ◽  
Supramolecular Polymerization ◽  
Liquid Crystalline Material

Disk- and rod-shaped molecules are incompatible in coassembly, as the former tend to stack one-dimensionally whereas the latter tend to align in parallel. Because this type of incompatibility can be more pronounced in condensed phases, different-shaped molecules generally exclude one another. We report that supramolecular polymerization of a disk-shaped chiral monomer in nematic liquid crystals comprising rod-shaped molecules results in order-increasing mesophase transition into a single mesophase with a core-shell columnar geometry. This liquid crystalline material responds quickly to an applied electric field, resulting in unidirectional columnar ordering. Moreover, it can be modularly customized to be optoelectrically responsive simply by using a photoisomerizable rod-shaped module. The modular strategy allows for cooperative integration of different functions into elaborate dynamic architectures.

New Aspects of Organic Electric Materials in Calamitic Liquid Crystalline Photoconductors

1999 ◽  
Vol 598 ◽  
Author(s):  
Hiroki Maeda ◽  
Masahiro Funahashi ◽  
Jun-Ichi Hanna
Keyword(s):  
Liquid Crystals ◽  
Liquid Crystalline ◽  
Carrier Transport ◽  
Crystalline Material ◽  
Structural Defects ◽  
Defect States ◽  
Domain Boundaries ◽  
Position Sensitive ◽  
Electric Materials ◽  
Liquid Crystalline Material

ABSTRACTCalamitic liquid crystalline photoconductors such as 2-(4'-octylphenyl)-6-butyloxynaphthalene (8-PNP-O4) and 2-(4'-octylphenyl)-6-dodecyloxynaphthalene (8-PNP-O12) exhibit fast ambipolar carrier transport in all the smectic mesophases up to 1.0 × 10−2 cm2/Vs. The structural defects of liquid crystals, i.e. domain boundaries and disclinations in domains, are electrically inactive and cause neither shallow nor deep defect states due to their fluid nature. It is illustrated that the carrier transport does not suffer from these structural defects in polydomain, by examining transient photo-currents in very thick liquid crystalline layers over 100μm. With an insight that this allowance of the polydomain structure and the fluidity of liquid crystalline photoconductors provides us new aspects in terms of electric property and application, e.g. multi-gap processing, the position detect sensor is demonstrated in a wedge cell filled of 8-PNP-O12, referring the position sensitive transit time of photo-induced transient current.The present result indicates that the photoconductive liquid crystalline material is available for multi-gap structured devices.

A New Liquid-Crystalline Material. Transition Metal-Poly(yne) Polymers

1979 ◽  
Vol 12 (5) ◽  
pp. 1016-1018 ◽  
Author(s):  
S. Takahashi ◽  
E. Murata ◽  
M. Kariya ◽  
K. Sonogashira ◽  
N. Hagihara
Keyword(s):  
Transition Metal ◽  
Liquid Crystalline ◽  
Crystalline Material ◽  
Liquid Crystalline Material
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