Nano-Architecture of Self-Assembled Monolayer and Multilayer Stacks of Lyotropic Chromonic Liquid Crystalline Dyes

Boiko, O. P.; Komarov, O. N.; Vasyuta, R.; Nazarenko, V. G.; Slominskiy, Yu.; Schneider, Tod

doi:10.1080/15421400590955019

Cited by 9 publications

(14 citation statements)

References 12 publications

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“…The molecular structure of Blue 250 is the same as that of Blue 27 [12]; the only difference is a larger number of NH 4 + cations and the corresponding SO 3 -groups at the periphery of the molecule. We used the ionic solutes of KI, LiI, NaI, NaCl, CaCl 2 , NH 4 Cl, (NH 4 ) 2 SO 4 , Na 2 SO 4 and (C 4 H 9 ) 4 NI, all of which are purchased from Sigma. The salts were added into the solution of Blue 250 dissolved in deionized water.…”

Section: Methodsmentioning

confidence: 78%

“…In a wide concentration region both T N and T I increase when the salt concentrations do. Finally, NH 4 Cl belongs to the third group for Visual observations indicate that viscosity of the solutions increases with increasing salt concentration and the solutions become quite viscous even in the isotropic phase at high enough salt concentrations.…”

Section: Phase Behaviourmentioning

confidence: 99%

“…However, functional role of LCs in the LCDs has recently been expanded to solve different problems related to the quality of displayed images, using a new type of LCs, Lyotropic Chromonic Liquid Crystals (LCLC). Due to their high orientational ordering, negative optical birefringence and dichroism, LCLCs have been proposed as potential materials for internal retardation films, including viewing angle compensators and temperature compensating retardation films, optical rotators, polarizers and alignment layers incorporated into LC panels [1][2][3][4][5][6]. In water LCLC molecules associate into nano-sized aggregates, which then self-assemble into structures with long-range orientational order, i.e.…”

Section: Introductionmentioning

confidence: 99%

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Chromonic nematic phase and scalar order parameter of indanthrone derivative with ionic additives

Boiko¹,

Vasyuta²,

Semenyshyn³

et al. 2008

Ukr. J. Phys. Opt.

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We investigate influence of different ionic additives on the phase behaviour and scalar order parameter of lyotropic chromonic nematic liquid crystals formed by the molecules representing derivatives of indanthrone. KI, (NH 4 ) 2 SO 4 and NaCl salts increase biphasic nematic region on the temperature-concentration phase diagram, whereas the scalar orientational order parameter is hardly sensitive to their presence. We suggest that these changes are attributed to increase in the aggregate length and polydispersity of the latter, while the interaction between aggregates remains unaffected. The Na 2 SO 4 salt lowers anomalously the measured value of the scalar order parameter to 0.42, for which the nematic phase should not exist. We address this anomaly to modification of the shape of chromonic aggregates due to growing of side chains within the rod-like aggregates. The NH 4 Cl salt does not affect the phase diagram and the scalar order parameter of Blue 250 chromonematic.

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Section: Methodsmentioning

confidence: 78%

Section: Phase Behaviourmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Chromonic nematic phase and scalar order parameter of indanthrone derivative with ionic additives

Boiko¹,

Vasyuta²,

Semenyshyn³

et al. 2008

Ukr. J. Phys. Opt.

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show abstract

“…11(c)). 62 However, no enhancement of anisotropy was observed for these films compared to those of 20 and 21. It was found that multilayer films with three or more layers of 23 were unstable.…”

Section: Fabrication Of Oriented Filmsmentioning

confidence: 77%

“…10) with in-plane orientational order were prepared by using a combination of electrostatic layer-by-layer deposition and shear orientation techniques. [60][61][62] A glass or mica surface was modified with polycation 20. An aqueous solution of Violet 20 (21) in the chromonic N phase was then coated onto the polycation layer by mechanical shearing.…”

Section: Fabrication Of Oriented Filmsmentioning

confidence: 99%

Chromonic liquid crystals: properties and applications as functional materials

2008

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Chromonic liquid crystals (or chromonics) are formed by the self-organization of aromatic compounds with ionic or hydrophilic groups in aqueous solutions. This review summarizes the research on chromonic liquid crystals in the last two decades. The research embraced the studies of commercially available chromonic dyes and drugs, the syntheses and investigations of molecularly designed mesogens, the invention of novel processes for aligning chromonic liquid crystals, and the development of new applications as functional materials and biosensors.

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Lyotropic Chromonic Liquid Crystals: Emerging Applications

Park

Lavrentovich

2012

Liquid Crystals Beyond Displays

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Nano-Architecture of Self-Assembled Monolayer and Multilayer Stacks of Lyotropic Chromonic Liquid Crystalline Dyes

Cited by 9 publications

References 12 publications

Chromonic nematic phase and scalar order parameter of indanthrone derivative with ionic additives

Chromonic nematic phase and scalar order parameter of indanthrone derivative with ionic additives

Chromonic liquid crystals: properties and applications as functional materials

Lyotropic Chromonic Liquid Crystals: Emerging Applications

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