Journal ArticleDOI
Synthesis, characterization and theoretical considerations of a novel class of banana-shaped compounds with liquid crystal properties
Edit Matyus,Katalin Keserű +1 more
Reads0
Chats0
TLDR
In this paper, two bis(acylated) resorcinol derivatives incorporating two and four additional benzene rings, respectively, were synthesized, and valuable liquid crystalline properties were detected.Abstract:
As analogues of banana-shaped compounds, two novel series of bis(acylated) resorcinol derivatives incorporating two and four additional benzene rings, respectively, were synthesized. In the first series of compounds resorcinols were acylated with 4-alkoxycinnamoyl chlorides, whereas in the second series, 1,3-bis(4-hydroxybenzoyloxy)-4-chlorobenzene was prepared first, and subsequently, 4-alkoxycinnamoyl groups were introduced. In the cases of five-ring compounds 34 – 39 , valuable liquid crystalline properties were detected. Nematic phases could be observed within a wide range of temperatures. Moreover, of these compounds, the hexadecyloxy derivative displayed a short monotropic smectic phase with a latticed texture. Molecular modeling studies have indicated that compounds of five-ring structures of type 34 – 39 may have energy minima in which the three planar building moieties of the central bisacylated resorcinol unit are not necessarily coplanar.read more
Citations
More filters
Flexoelectricity of a Calamitic Liquid Crystal Elastomer Swollen With a Bent-Core Liquid Crystal
TL;DR: In this article, the bend flexoelectric coefficient of a calamitic liquid crystal elastomer (LCE) swollen with a low molecular weight bent-core nematic (BCN) liquid crystal was determined.
Journal ArticleDOI
Flexoelectricity of a calamitic liquid crystal elastomer swollen with a bent-core liquid crystal
TL;DR: In this article, the bend flexoelectric coefficient of a calamitic liquid crystal elastomer (LCE) swollen with a low molecular weight bent-core nematic (BCN) liquid crystal was determined.
Journal ArticleDOI
Physical properties of a bent-core nematic liquid crystal and its mixtures with calamitic molecules
TL;DR: In this article, the results obtained by various experimental methods on the physical properties of a bent-core nematic liquid crystal 4-chloro-1,3-phenylene bis-4-[4′-(9-decenyloxy) benzoyloxy] benzoate (ClPbis10BB) were summarized.
Journal ArticleDOI
Thermally stable azo-substituted bent-core nematogens: observation of chiral domains in the nematic mesophases composed of smectic nano clusters
TL;DR: In this article, the effect of different lateral substituents (CH3 and Cl) at two different positions in one of the arms, on the mesogenic properties of azo-substituted bent-core compounds was studied.
Journal ArticleDOI
Effect of methoxy group instead of polar group in the nematic phase of four-ring bent-core liquid crystals
TL;DR: In this paper, two achiral four-ring bent-core liquid crystal possessing an alkoxy chain at one end of the molecules and methoxy group at the other end are investigated by using the optical polarizing microscope, electro-optical studies, and dielectric spectroscopy.
References
More filters
Journal ArticleDOI
Submicrosecond bistable electro‐optic switching in liquid crystals
Noel A. Clark,Sven T. Lagerwall +1 more
TL;DR: Ferroelectric smectic C (FSC) liquid crystals are used in a simple new geometry that allows the spontaneous formation of either of two surface-stabilized smective C monodomains of opposite ferroelectric polarization as discussed by the authors.
Journal ArticleDOI
Distinct ferroelectric smectic liquid crystals consisting of banana shaped achiral molecules
TL;DR: In this article, the synthesis of a banana-shaped molecule is reported and it is found that the smectic phase which it forms is biaxial with the molecules packed in the best direction into a layer.
Journal ArticleDOI
Spontaneous formation of macroscopic chiral domains in a fluid smectic phase of achiral molecules
Darren R. Link,Giorgio Natale,Renfan Shao,Joseph E. Maclennan,Noel A. Clark,Eva Korblova,David M. Walba +6 more
TL;DR: A smectic liquid-crystal phase made from achiral molecules with bent cores was found to have fluid layers that exhibit two spontaneous symmetry-breaking instabilities: polar molecular orientational ordering about the layer normal and molecular tilt.
Journal ArticleDOI
Banana-Shaped Compounds—A New Field of Liquid Crystals
Journal ArticleDOI
Influence de la déformation plastique sur les propriétés ultrasonores de la glace Ih
TL;DR: In this paper, anomalies of vitesse observee ne peut etre totalement expliquee par la theorie des dislocations were investigated. André et al. effectue entre 100 and 273 K des mesures d'attenuation and de vitesness d'ondes ultrasonores de frequence 5 MHz sur des echantillons monocristallins de glace.