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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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Thi Minh Nguyet Trinh, Thanh Tung Nguyen, Cyril Kopp, Pauline Pieper, Virginie Russo, Benoît Heinrich, Bertrand Donnio, Thi Le Anh Nguyen, Robert Deschenaux
Olefin Cross-Metathesis: a Versatile Synthetic Reaction for the Design of Janus Liquid Crystals [Full Paper]

Olefin Cross-Metathesis: a Versatile Synthetic Reaction for the Design of Janus Liquid Crystals

New Janus-like liquid crystals were synthesized by olefin cross-metathesis in the presence of the 2nd generation Grubbs catalyst. Linear, chiral, dendritic and nonmesomorphic olefins were used. Smectic C, smectic A, nematic and chiral phases were observed in agreement with the structure and nature of the mesogens.

Eur. J. Org. Chem., August 11, 2015, DOI: 10.1002/ejoc.201500754

Xiaowei Li, Bao Li, Long Chen, Jinchuan Hu, Chengdanyang Wen, Qingdong Zheng, Lixin Wu, Huaqiang Zeng, Bing Gong, Lihua Yuan
Liquid-Crystalline Mesogens Based on Cyclo[6]aramides: Distinctive Phase Transitions in Response to Macrocyclic Host–Guest Interactions [Communication]

Liquid-Crystalline Mesogens Based on Cyclo[6]aramides: Distinctive Phase Transitions in Response to Macrocyclic Host–Guest Interactions

Stack the deck: Cyclo[6]aramides, having a hydrogen-bond-constrained backbone and a well-defined inner cavity, exhibit rich liquid-crystalline mesomorphic properties. Exploitation of host–guest interactions between the cavity (blue/green discs) and alkylammonium salts (red) leads to distinct mesophase transitions from a lamellar to a hexagonal columnar phase, as shown by polarized optical microscopy.

Angew. Chem. Int. Ed., August 11, 2015, DOI: 10.1002/anie.201505278

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. 2015, 54, No. 37, 10921-10925

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. 2015, 54, No. 35, 10155-10159

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. 2015, 54, No. 33, 9710-9714

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. 2015, No. 23, 5115-5127

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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