Chirality and Frustration in Ordered Fluids

Goodby, John W.; Slaney, A. J.; Booth, Christopher J.; Nishiyama, Isa; Vuijk, Jelle D.; Styring, Peter; Toyne, Kenneth J.

doi:10.1080/10587259408037771

Cited by 128 publications

(90 citation statements)

References 48 publications

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“…The structure suggested for the IsoSm* polymers [4] is similar to the recently discovered Twist Grain Boundary phase (TGB-phase). [5] In such a structure, the small Sm A blocks are organized in a stepwise helix with a lattice of screw dislocations penetrating the whole phase. For the particular case of the IsoSm* phase, the helical pitch of 250 -300 nm is shorter than the visible wavelength range.…”

Section: Introductionmentioning

confidence: 99%

Chiral side chain copolymers, 4. Kinetics of the phase transition from liquid melt to an amorphous phase with a hidden layer structure - the “isotropic smectic” state

Kozlovsky¹,

Meier

Stumpe

2000

Macromol. Chem. Phys.

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The kinetically controlled mesophase formation has been observed for a series of photochromic side chain copolymethacrylates. Up to 25% of azobenzene dichroic moieties, the copolymers form an optically isotropic mesophase with layer ordering – the “isotropic smectic” phase, IsoSm*. The kinetics of the Iso‐IsoSm* phase transition, as studied by DSC and X‐ray techniques, in some cases cannot be explained in terms of a single Avrami equation. A two‐step mechanism is suggested including the transformation from the monolayer to the bilayer structure. The dependence of the transition temperature on annealing temperature has been estimated.

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Section: Introductionmentioning

confidence: 99%

Chiral side chain copolymers, 4. Kinetics of the phase transition from liquid melt to an amorphous phase with a hidden layer structure - the “isotropic smectic” state

Kozlovsky¹,

Meier

Stumpe

2000

Macromol. Chem. Phys.

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“…5. This effect occurs due to the fact that two used methods for tilt measurements are sensible for different structure elements [11]. The electrooptical method detects the mean orientation of the molecular core which defines the optical properties while the X-ray method detects the spatial period of molecular arrangement.…”

Section: Resultsmentioning

confidence: 99%

Electrophysical properties of a system with induced antiferroelectric phase comprising cyano compound

Skrzypek

Tykarska

Piecek

2007

Opto-Electronics Review

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The DSC, electrooptic and X-ray results for the system composed of two synclinic compounds CNCH2COO(CH2)6OphPhCOOPhCOOC*H(CH3)C6H13 and C5H11COO(CH2)3OPhCOOPhPhCOOC*H(CH3)C6H13 are presented. The antiferroelectric SmC*A phase induces in this system and it was confirmed by physical measurements. It was found out that the mechanism of SmC*A phase induction is different than in systems comprising compound with perfluoroalkyl chain.

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“…This may be illustrated using the following three compounds: (S)-4- Compounds 52 and 54 have chiral groups, which may be described, using Gray and McDonnell's rules, as (S), e, d; therefore, the groups should reinforce one another. This is certainly the case with compound 52 (p = 0.10 μm); the longer pitch of compound 54 (p = 0.23 μm) is due to the increased distance between the chiral center and the aromatic mesogenic core, which effectively reduces any damping of rotation about the chiral center [91]. On the other hand, the 2-methylbutoxy group of compound 53 may be described, by Gray and McDonnell's rules, as (S), o, l, the opposite of the 2-methylbutyl group [(S), e, d], which leads to compensation and a longer pitch length (p = 0.46 μm) [94].…”

Section: Ester Mesogensmentioning

confidence: 99%

“…Despite the wide variety of chiral nematic liquid crystals (and of course low molar mass chiral liquid crystals in general), it is possible to subdivide them into three class types, according to the relationship of the chiral moiety and the liquid-crystalline core [91]. Firstly, we consider type I; here the chiral center (or multiplicity of chiral centers) is situated in a terminal alkyl chain attached to the effective liquid-crystalline core.…”

Section: Classification Of Chiral Nematic Liquid-crystalline Compoundsmentioning

confidence: 99%

Design and Synthesis of Chiral Nematic Liquid Crystals

Taugerbeck

Booth

2014

Handbook of Liquid Crystals

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The article contains sections titled: Introduction to the Chiral Nematic Phase and Its Properties Formulation and Application of Chiral Nematic Liquid Crystal Mixtures Applications of Chiral Nematic Phases Classification of Chiral Nematic Liquid‐Crystalline Compounds Aspects of Molecular Symmetry for Chiral Nematic Phases Type I Chiral Nematic Liquid Crystals Azobenzenes and Related Mesogens Azomethine ( S chiff's Base) Mesogens Stable Phenyl, Biphenyl, Terphenyl, and Phenylethylbiphenyl Mesogens Ester Mesogens Derivatives of Chiral Alcohols Type II Chiral Nematic Liquid Crystals Type IIa Twin Systems Using Chiral Flexible Spacers Type IIb Materials Using Achiral Flexible Spacers and Chiral Terminal Groups Type IIc and d Materials Using One or Two Chiral Cores Type III Chiral Nematic Liquid Crystals Cholesteryl Esters Chiral Mesogens Derived from Cyclohexane Chiral Heterocyclic Mesogens Axially Chiral Liquid Crystals Axially Chiral Alkenes and Overcrowded Alkenes Allenes Tricyclo[4.4.0.0 3,8 ]decane or Twistane Derived Mesogens Sterically Hindered Biphenyl Derivatives Spirobiindane Derivatives Concluding Remarks

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Chirality and Frustration in Ordered Fluids

Cited by 128 publications

References 48 publications

Chiral side chain copolymers, 4. Kinetics of the phase transition from liquid melt to an amorphous phase with a hidden layer structure - the “isotropic smectic” state

Chiral side chain copolymers, 4. Kinetics of the phase transition from liquid melt to an amorphous phase with a hidden layer structure - the “isotropic smectic” state

Electrophysical properties of a system with induced antiferroelectric phase comprising cyano compound

Design and Synthesis of Chiral Nematic Liquid Crystals

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