6-S-Alkyl-6-thiohexonolactones and 6-S-Alkyl-6-thiohexitols: Efficient synthesis and new smectic liquid crystal phases

Chaveriat, Ludovic; Meyer, Claire; Beaupère, D.; Demailly, Gilles; Stasik, Imane

doi:10.1016/j.molliq.2008.03.007

Cited by 9 publications

(4 citation statements)

References 35 publications

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“…The elongated structures appear similar to the oily streak textures which result from regular stacking of focal conic domains. , Oil streaks are thermodynamically favorable since they reduce the strain and surface energy between neighboring focal conic domains. Oily streak textures have also been observed in thermotropic liquid crystals by decreasing the temperature and in lyotropic liquid crystals by applying shear …”

Section: Resultsmentioning

confidence: 95%

“…22,23 Oil streaks are thermodynamically favorable since they reduce the strain and surface energy between neighboring focal conic domains. Oily streak textures have also been observed in thermotropic liquid crystals by decreasing the temperature 24 and in lyotropic liquid crystals by applying shear. 25 Phase Behavior and Rheology.…”

Section: ■ Experimental Sectionmentioning

confidence: 92%

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Liquid Crystalline Phase Behavior of Silica Nanorods in Dimethyl Sulfoxide and Water

Davis

2014

Langmuir

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We report lyotropic smectic liquid crystalline phase behavior of silica nanorods dispersed in binary mixtures of dimethyl sulfoxide (DMSO) and water (H2O). The phase behavior is affected by nanorod size polydispersity and DMSO concentration in the binary solvent. The isotropic to biphasic transition is strongly affected by the relative amount of DMSO in the solvent, but the solvent has little effect on the biphasic to liquid crystal transition above 40/60 DMSO/H2O by volume. At less than 40% DMSO, increasing silica nanorod concentration initially results in the formation of liquid crystalline domains, but further increasing silica concentration results in crystal solvate formation. The morphology of the liquid crystalline phase is strongly affected by the size polydispersity, with lower polydispersity leading to a more uniform structure. As in other lyotropic nanocylinder systems, the microstructure of continuous solid films produced from the dispersions was affected by both the initial microstructure and the applied shear.

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Section: Resultsmentioning

confidence: 95%

Section: ■ Experimental Sectionmentioning

confidence: 92%

Liquid Crystalline Phase Behavior of Silica Nanorods in Dimethyl Sulfoxide and Water

Davis

2014

Langmuir

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“… 17,62,64,68–70 The Sm A phase can be identified by observing the defects appearing in the texture, such as focal conics or Maltese crosses which form upon cooling from the isotropic melt. 71,72 All compounds studied herein formed a Sm phase confirmed by POM before transition to isotropic fluid state (Fig. S2–S11, ESI † ).…”

Section: Resultsmentioning

confidence: 80%

Stereochemistry-dependent thermotropic liquid crystalline phases of monosaccharide-based amphiphiles

Mattsson,

Majoinen,

Lahtinen

et al. 2023

Soft Matter

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“…These defects, first reported by Friedel [ 2 ], are called bâtonnets, which is French-origin word for rods mainly used in the LC defect studies. They have been reported in different lamellar phases of new liquid crystal compounds [ 3 , 4 , 5 , 6 , 7 ]. They can be either cylindrical or spherical with rounded ends.…”

Section: Introductionmentioning

confidence: 99%

Optical Microscopy Observations and Construction of Dupin Cyclides at the Isotropic/Smectic A Phase Transition

et al. 2021

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In this work, we are interested in the nucleation of bâtonnets at the Isotropic/Smectic A phase transition of 10CB liquid crystal. Very often, these bâtonnets are decorated with a large number of focal conics. We present here an example of a bâtonnet obtained by optical crossed polarized microscopy in a frequently observed particular area of the sample. This bâtonnet presents bulges and one of them consists of a tessellation of ellipses. These ellipses are two by two tangent, one to each other, and their confocal hyperbolas merge at the apex of the bâtonnet. We propose a numerical simulation with Python software to reproduce this tiling of ellipses as well as the shape of the smectic layers taking the well-known shape of Dupin cyclides within this particular bâtonnet area.

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6-S-Alkyl-6-thiohexonolactones and 6-S-Alkyl-6-thiohexitols: Efficient synthesis and new smectic liquid crystal phases

Cited by 9 publications

References 35 publications

Liquid Crystalline Phase Behavior of Silica Nanorods in Dimethyl Sulfoxide and Water

Liquid Crystalline Phase Behavior of Silica Nanorods in Dimethyl Sulfoxide and Water

Stereochemistry-dependent thermotropic liquid crystalline phases of monosaccharide-based amphiphiles

Optical Microscopy Observations and Construction of Dupin Cyclides at the Isotropic/Smectic A Phase Transition

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