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Liquid Crystals

Liquid crytals (LCs) are probably the most exciting state of matter. They attract scientists across disciplines such as chemistry, physics, materials science, and engineering—theorists and experimentalists alike. These days, you can buy quite affordable LCD TV sets around the corner, but that's just one of the many things liquid crystals can do. The selection of recent research articles presented below illustrates the broad interest in this area of soft condensed matter.

Recommended Reading

J. W. Goodby, P. J. Collings, T. Kato, C. Tschierske, H. Gleeson, P. Raynes (Eds)
Handbook of Liquid Crystals
2nd edition, Wiley-VCH, Weinheim, 2014.

Find all articles on liquid crystals in Wiley Online Library...

See the International Liquid Crystal Society's website.

Recent Articles

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Polycatenar mesogens with various degree of flexibility of molecular structure

Series of newly synthesized rod-like polycatenar mesogens was found to form columnar phases with the number of molecules in the column cross-section depending on the core rigidity. For non-symmetric molecules the additional density modulation - helical arrangement of molecules developed along the columns, with periodicity of ~10 molecular distances. For one of the compounds new type of columnar LC phase was observed with 3D positional order. Introducing stilbene unit in the mesogenic core enhanced fluorescent properties of the compounds, in Colh phase the polarized light emission was observed.

[Article]
Joanna Maria Wolska, Neha Topnani, Ewa Gorecka, Jozef Mieczkowski, Damian Pociecha
ChemPhysChem, May 23, 2016, DOI: 10.1002/cphc.201600330. Read article

Photoresponsive Cyanostilbene Bent-Core Liquid Crystals as New Materials with Light-Driven Modulated Polarization

Photoresponsive Cyanostilbene Bent‐Core Liquid Crystals as New Materials with Light‐Driven Modulated Polarization

Two isomeric cyanostilbene photoswitchable bent-core mesogens with polar liquid crystal phases in which macroscopic polarization and luminescence can be light-modulated are claimed. Z/E isomerization or [2+2] cycloaddition photochemical processes occur depending on the chemical structure, which make the compounds very innovative multifunctional advanced materials.

[Communication]
Marta Martínez-Abadía, Beatriz Robles-Hernández, María Rosario de la Fuente, Raquel Giménez, Maria Blanca Ros
Adv. Mater., May 23, 2016, DOI: 10.1002/adma.201600311. Read article

Photoresponsive Fiber Array: Toward Mimicking the Collective Motion of Cilia for Transport Applications

Photoresponsive Fiber Array: Toward Mimicking the Collective Motion of Cilia for Transport Applications

An easily scalable and modular method is developed to create an array of responsive fibers. The fibers are able to respond to UV light in a concerted way to mimic the natural cilia motion. This efficient collective bending gives a directional transport of floating object by use of light. Such hairy surfaces could be integrated in microfluidic device.

[Full Paper]
Anne Helene Gelebart, Matthew Mc Bride, Albertus P. H. J. Schenning, Christopher N. Bowman, Dirk J. Broer
Adv. Funct. Mater., May 23, 2016, DOI: 10.1002/adfm.201601221. Read article

Polar Liquid Crystals Derived from Sulfonium Zwitterions of the [closo-1-CB11H12] Anion

Polar Liquid Crystals Derived from Sulfonium Zwitterions of the [closo-1-CB11H12]– Anion

Zwitterionic derivatives of the [closo-1-CB11H12] anion form liquid-crystalline phases and improve the dielectric properties of nematic liquid-crystal materials.

[Full Paper]
Jacek Pecyna, Remigiusz Żurawiński, Piotr Kaszyński, Damian Pociecha, Piotr Zagórski, Serhii Pakhomov
Eur. J. Inorg. Chem., April 27, 2016, DOI: 10.1002/ejic.201600240. Read article.

Hexagonal Lyotropic Liquid Crystal from Simple “Abiotic” Foldamers

Hexagonal Lyotropic Liquid Crystal from Simple “Abiotic” Foldamers

Total recoil: A novel foldamer scaffold, in which p-phenyleneethynylene units are linked by chiral carbon atoms, is reported. In very dilute solutions, these oligomers are random coils. The hexamer and octamers form a hexagonal lyotropic liquid crystal in CH2Cl2 when the concentrations reach the critical values.

[Full Paper]
Yu Chen, Zhiqiang Zhao, Zheng Bian, Rizhe Jin, Chuanqing Kang, Xuepeng Qiu, Haiquan Guo, Zhijun Du, Lianxun Gao
ChemistryOpen, April 27, 2016, DOI: 10.1002/open.201600007. Read article

Discogens Possessing Aryl Side Groups Synthesized by Suzuki Coupling of Triphenylene Triflates and Their Self-Organization Behavior

Discogens Possessing Aryl Side Groups Synthesized by Suzuki Coupling of Triphenylene Triflates and Their Self-Organization Behavior

Versatile Suzuki cross-coupling reactions between arylboronic acids and triphenylenyl triflates generate a rich diversity of attractive functional discogens.

[Full Paper]
Ke-Qing Zhao, Yue Gao, Wen-Hao Yu, Ping Hu, Bi-Qin Wang, Benoît Heinrich, Bertrand Donnio
Eur. J. Org. Chem., April 13, 2016, DOI: 10.1002/ejoc.201600270. Read article.

Dual-Responsive Viscoelastic Lyotropic Liquid Crystal Fluids to Control the Diffusion of Hydrophilic and Hydrophobic Molecules

Dual‐Responsive Viscoelastic Lyotropic Liquid Crystal Fluids to Control the Diffusion of Hydrophilic and Hydrophobic Molecules

Unlocking molecule release: A dual-responsive lyotropic liquid crystal system for the controlled release of molecules is reported.

[Article]
Dong Wang, Yueying Cao, Meiwen Cao, Yawei Sun, Jiqian Wang, Jingcheng Hao
ChemPhysChem, April 08, 2016, DOI: 10.1002/cphc.201600066. Read article

Blue and Green Phosphorescent Liquid-Crystalline Iridium Complexes with High Hole Mobility

Blue and Green Phosphorescent Liquid-Crystalline Iridium Complexes with High Hole Mobility

A simple modular design was used to impart liquid-crystalline properties to iridium complexes without modification of their photophysical properties. Annealed films of the liquid-crystalline complexes display hole mobilities up to three orders of magnitude higher than parent iridium complex without mesogenic groups and are the highest values reported to date for iridium complexes (see figure).

[Communication]
Yafei Wang, Christopher P. Cabry, ManJun Xiao, Louise Male, Stephen J. Cowling, Duncan W. Bruce, Junwei Shi, Weiguo Zhu, Etienne Baranoff
Chem. Eur. J., December 22, 2015, DOI: 10.1002/chem.201504669. Read article.

Chemical Programming of the Domain of Existence of Liquid Crystals

Chemical Programming of the Domain of Existence of Liquid Crystals

Changing states: The cohesive free energy density concept (CFED) is applied to thermotropic cyanobiphenyl-based liquid crystals to establish predictive quantitative correlations between each antagonist segments of the amphiphilic molecules (flexible alkyl tail/rigid aromatic core) and their transition temperatures (solid→liquid crystalline/liquid crystalline→ isotropic liquid; see figure).

[Full Paper]
Thibault Dutronc, Emmanuel Terazzi, Laure Guénée, Kerry-Lee Buchwalder, Sébastien Floquet, Claude Piguet
Chem. Eur. J., December 14, 2015, DOI: 10.1002/chem.201503420. Read article.

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