bent core
The nematic phases of bent-core liquid crystals
... by bent-core molecules has proven rather chal- lenging because of the high temperatures at which the nemat- ic phase often occurs (> 150 8C) and because it has been diffi- cult to obtain the high-quality ...
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Unusual electric-field-induced transformations in the dark conglomerate phase of a bent-core liquid crystal
... achiral bent-core molecules may exist in chiral conformational states and under suitable conditions an enantiomeric excess (defined by e=(n L ˗n R )/(n L +n R ) where n L and n R are ...
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Effect of cybotactic clusters on the elastic and flexoelectric properties of bent core liquid crystals belonging to the same homologous series
... of bent-core and calamitic systems offer huge potential for a range of applications, the commercially successful liquid crystal (LC) applications, so far, are mostly based on ...for bent-core ...
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Anomalously low twist and bend elastic constants in an oxadiazole-based bent-core nematic liquid crystal and its mixtures : contributions of spontaneous chirality and polarity
... oxadiazole-based bent-core NLC and its mixtures have been ...both bent and twist constants has been observed neither in other bent-core NLCs nor in other types of ...
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From understanding structures in antiferro-ferri and ferroelelectric liquid crystals to an unusual electro-optic effect in a bent-core nematic; a celebration of innovative materials
... and bent-core systems, allowed insight into the physics of a wide range of novel liquid crystal ...onto bent core materials, a hot topic for the last 15 years or so, instigated by the ...
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Formation and development of nanometer sized cybotactic clusters in bent core nematic liquid crystalline compounds
... terminated bent-core systems; only the temperature range of the nematic phase for the two compounds is ...the bent-core nematic phase in terms of its forma- tions and transformations with bias ...
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Effect of polar intermolecular interactions on the elastic constants of bent-core nematics and the origin of the twist-bend phase
... of bent-core molecules using the same molecular model and the Parsons-Lee approximation for intermolecular ...between bent-core molecules result in a dramatic increase of the bend ...
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Spontaneous helix formation in non chiral bent core liquid crystals with fast linear electro optic effect
... achiral bent-core (BC) molecules and has engendered great scientific interest in recent years 4 due to a range of fascinating phenomena arising from the interplay of polarity and chirality 5–7 ...
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observation of an anomalous SmA SmC SmA phase sequence in a bent core liquid crystal derived from 4 cyanoresorcinol
... Summarizing, we studied a smectic LC material con- stituted of the bent-core molecules using a range of tech- niques: electro-optics, polarizing microscopy, birefringence, and spontaneous polarization. ...
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Polar interactions between bent–core molecules as a stabilising factor for inhomogeneous nematic phases with spontaneous bend deformations
... of bent–core nematics with transverse electric dipoles using the same molecular model and have shown how the bend elastic constant can vanish at a certain ...
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Short range correlations seen in the nematic phase of bent core liquid crystals by dielectric and electro optic studies
... A different reason for the sign reversal in a calamitic LC in its nematic phase with a nematic-to-SmA phase transition had been given earlier [17]. The nanosized clusters grow in the nematic phase prior to the transition ...
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Chirality of an achiral bent core nematic mesogen observed in planar and homeotropic cells under certain boundary conditions
... the X-ray diffraction pattern has been interpreted in terms of the clusters. A weak small angle scattering can be interpreted as an indication of a nematic phase composed of clusters when the number of molecules ...
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Sequence of Four Orthogonal Smectic Phases in an Achiral Bent Core Liquid Crystal: Evidence for the SmAP(alpha) Phase
... achiral bent-core liquid crystal derived from 4-cyanoresorcinol are studied by polarizing optical microscopy, x-ray diffraction, and second harmonic electro-optic ...
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Bent core liquid crystalline cyanostilbenes : fluorescence switching and thermochromism
... several bent-core molecules bearing one or two cyanostilbene units and with different position of the cyano substituent (named α- or β-families) (Figure ...55 bent-core compounds 20 ...
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Molecular theory of proper ferroelectricity in bent-core liquid crystals
... of bent-core molecules assuming that the polar part of this potential is respon- sible for the ordering of short molecular ...Real bent- core molecules possess a much larger geometric ...
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Biaxial order parameter in the homologous series of orthogonal bent core smectic liquid crystals
... Measurements of biaxiality have been carried out on a bent- core 4-cyanoresorcinol bisbenzoate with two terephthalate- based wings [25], with alkyl chain lengths of 8, 12, and 14. The chemical structure of ...
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Second-harmonic generation and the influence of flexoelectricity in the nematic phases of bent-core oxadiazoles
... two bent-core oxadia- zole based LCs and compare it to that of the calamitic compound 4-cyano-4ʹ-n-octylbiphenyl (8CB), thus demonstrating the predicted, enhanced SH; (2) exam- ine the dependence of the SH ...
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Electrically tunable refractive index in the dark conglomerate phase of a bent-core liquid crystal.
... other bent-core liquid crystals occurs because of a series of electric-field-driven transformations that take place in the DC phase of the studied bent-core liquid ...
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Flexoelectricity in an oxadiazole bent-core nematic liquid crystal
... the bent-core LC C5-Ph-ODBP-Ph-OC12 compare with measurements of similar materials made using dif- ferent ...different bent-core mesogen, 4- cyanoresorcinol bisbenzoate, with an inwards ...
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Flexoelectric polarization studies in bent core nematic liquid crystals
... homologues of 4-cyanoresorcinols. They found these values to be lying in the range ∼19−24.4 pC/m depending on the reduced temperature [25]. These values are nevertheless much larger than obtained for calamitic LCs. A sum ...
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