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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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Viorel Cîrcu, Yann Molard, Maria Amela-Cortes, Ahmed Bentaleb, Philippe Barois, Vincent Dorcet, Stéphane Cordier
From Mesomorphic Phosphine Oxide to Clustomesogens Containing Molybdenum and Tungsten Octahedral Cluster Cores [Communication]

From Mesomorphic Phosphine Oxide to Clustomesogens Containing Molybdenum and Tungsten Octahedral Cluster Cores

Clustomesogens are metal atom clusters containing liquid crystalline materials. They have been obtained by grafting neutral cyanobiphenyl- or cholesteryl-containing tailor-made dendritic mesomorphic triphenylphosphine oxide ligands on luminescent (M6Cli8)4+ octahedral cluster cores (M=Mo, W).

Angew. Chem. Int. Ed., Jul 26, 2015, DOI: 10.1002/anie.201503205

Ewa Gorecka, Nataša Vaupotič, Anna Zep, Damian Pociecha, Jun Yoshioka, Jun Yamamoto, Hideo Takezoe
A Twist-Bend Nematic (NTB) Phase of Chiral Materials [Communication]

A Twist-Bend Nematic (NTB) Phase of Chiral Materials

Crystal clear: Chiral dimers consisting of rod-like and cholesteric units form a chiral twist-bend nematic phase (NTB*; see picture). The compressibility of the NTB phase made of bent dimers was found to be as large as in smectic phases. Atomic force microscopy observations showed a periodicity of about 50 nm in the chiral NTB phase of bent dimers.

Angew. Chem. Int. Ed., July 14, 2015, DOI: 10.1002/anie.201502440

Christian Invernizzi, Claudio Dalvit, Helen Stoeckli-Evans, Reinhard Neier
Synthesis and NMR Spectroscopic Study of the Self-Aggregation of 2-Substituted Benzene-1,3,5-tricarboxamides [Full Paper]

Synthesis and NMR Spectroscopic Study of the Self-Aggregation of 2-Substituted Benzene-1,3,5-tricarboxamides

The columnar self-assembly of a new class of 2-substituted N,N',N″-trialkylbenzene-1,3,5-tricarboxamides is reported. Hydrogen-bond-accepting substituents (e.g., alkoxy and alkynyloxy) were demonstrated to impair the columnar self-assembly process, whereas non-hydrogen-bond-accepting groups (e.g., bromine) strengthened the self-assembly process.

Eur. J. Org. Chem., July 14, 2015, DOI: 10.1002/ejoc.201500506

Shape-Persistent, Sterically Crowded Star Mesogens: From Exceptional Columnar Dimer Stacks to Supermesogens

Stilbenoid superstars: Star mesogens that are sterically crowded at the core pack in an exceptional helical-columnar dimer phase (see Scheme, bottom left). Pyridyl groups in the interspace of the arms bind aromatic carboxylic acids and incrementally transform the dimer phase into a columnar phase of supermesogens (right).

Angew. Chem. Int. Ed., June 23, 2015, DOI: 10.1002/anie.201501988

Mark T. Sims, Laurence C. Abbott, Stephen J. Cowling, John W. Goodby, John N. Moore
Dyes in Liquid Crystals: Experimental and Computational Studies of a Guest–Host System Based on a Combined DFT and MD Approach [Full Paper]

Dyes in Liquid Crystals: Experimental and Computational Studies of a Guest–Host System Based on a Combined DFT and MD Approach

Model guest: A guest anthraquinone dye that aligns within a nematic liquid crystal host is modelled by a combined computational approach. DFT calculations give the alignment of the transition dipole moment within the dye, and fully atomistic MD simulations model the alignment of the dye within the host.

Chem. Eur. J. 2015, 21, No. 28, 10123-10130

Michał M. Wójcik, Magdalena Olesińska, Michał Sawczyk, Józef Mieczkowski, Ewa Górecka
Controlling the Spatial Organization of Liquid Crystalline Nanoparticles by Composition of the Organic Grafting Layer [Full Paper]

Controlling the Spatial Organization of Liquid Crystalline Nanoparticles by Composition of the Organic Grafting Layer

Softening nanocrystalline gold: An efficient method to control the spatial arrangement of liquid crystalline gold nanoparticles was developed by changing the composition of the mesogenic grafting layer. Structural studies showed that the organic sublayer is more dense with increasing average ligand number, thereby separating the nanoparticles in the liquid crystalline phases, which changes the parameters of these phases (see figure).

Chem. Eur. J. 2015, 21, No. 28, 10082-10088

Xianxian Liu, Qiwei Yang, Zongbi Bao, Baogen Su, Zhiguo Zhang, Qilong Ren, Yiwen Yang, Huabin Xing
Nonaqueous Lyotropic Ionic Liquid Crystals: Preparation, Characterization, and Application in Extraction [Full Paper]

Nonaqueous Lyotropic Ionic Liquid Crystals: Preparation, Characterization, and Application in Extraction

Putting order into ionic liquids: Ionic liquid (IL)-based nonaqueous lyotropic liquid crystals (LLCs) exhibit extraordinarily high extraction capacity, excellent separation selectivity, and easy recycling. The introduction of self-assembled nanostructures into IL systems is an efficient way to enhance the recognition ability for H-bond donor molecules. The IL-based LLCs successfully combine the unique properties of ILs and LCs and provide a new platform for high-performance separation.

Chem. Eur. J. 2015, 21, No. 25, 9150-9156

Beatriz Feringán, Pilar Romero, José Luis Serrano, Raquel Giménez, Teresa Sierra
Supramolecular Columnar Liquid Crystals Formed by Hydrogen Bonding between a Clicked Star-Shaped s-Triazine and Benzoic Acids [Full Paper]

Supramolecular Columnar Liquid Crystals Formed by Hydrogen Bonding between a Clicked Star-Shaped s-Triazine and Benzoic Acids

Crystals from stars: A new supramolecular synthon, based on tris(triazolyl)triazine (see figure), can interact through hydrogen bonds with benzoic acids and self-organize in columns.

Chem. Eur. J. 2015, 21, No. 24, 8859-8866

Michael Giese, Lina K. Blusch, Mostofa K. Khan, Mark J. MacLachlan
Functional Materials from Cellulose-Derived Liquid-Crystal Templates [Review]

Functional Materials from Cellulose-Derived Liquid-Crystal Templates

Out of the woods: Novel mesoporous and nanostructured materials can be generated by templating approaches based on cellulose-based liquid crystals derived from trees. This Review focuses on materials templated by cellulose nanocrystals, since their chiral nematic order allows their use in various optical applications such as optical filters, sensors, and optoelectronics.

Angew. Chem. Int. Ed. 2015, 54, No. 10, 2888-2910

Di- and Tricationic Organic Salts: An Overview of Their Properties and Applications

Di- and tricationic organic salts combine the properties of corresponding monocationic salts with individual features due to the presence of different charged heads on the cation structures. This allows their use in different fields of application such as ionic liquid crystals and gel phases.

Eur. J. Org. Chem. 2014, No. 20, 4201-4223

Supramolecular Assemblies by Charge-Transfer Interactions between Donor and Acceptor Chromophores

Riot of color: Alternate stacking of aromatic donor and acceptor building blocks by complementary and directional charge-transfer interactions produce versatile supramolecularly assembled materials including micelles, vesicles, nanotubes, fibrillar gels, folded polymers, cross-linked networks, and liquid-crystalline phases.

Angew. Chem. Int. Ed. 2014, 53, No. 08, 2038-2054

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