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.
J. W. Goodby, P. J. Collings, T. Kato, C. Tschierske, H. Gleeson,
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.
Zwitterionic derivatives of the [closo-1-CB11H12]– anion form liquid-crystalline phases and improve the dielectric properties of nematic liquid-crystal materials.
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.
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.
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
Versatile Suzuki cross-coupling reactions between arylboronic acids and triphenylenyl triflates generate a rich diversity of attractive functional discogens.
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.
Unlocking molecule release: A dual-responsive lyotropic liquid crystal system for the controlled release of molecules is reported.
Dong Wang, Yueying Cao, Meiwen Cao, Yawei Sun, Jiqian Wang, Jingcheng Hao
ChemPhysChem, April 08, 2016, DOI: 10.1002/cphc.201600066. Read article
Liquid crystal graphene has been realized with a cationic surfactant during the graphene oxide reduction for preventing aggregation of the flakes. The suspension can be electro-optically modulated by applying weak electric fields due to the macroscopic alignment of the graphene flakes along the field direction. The system shows drastically improved birefringence and time stability compared to graphene oxide suspensions.
[Rapid Research Letter]
Min Jae Kim, Ji Hyun Park, Jun Yamamoto, Youn Sang Kim, Giusy Scalia
Phys. Status Solidi RRL, April 05, 2016, DOI: 10.1002/pssr.201600038. Read article
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).
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.
The high temperature magnetic and structural properties of an amphiphilic iron(III) spin crossover complex are reported. Thermal cycling reveals a scan rate-dependent 20 K thermal hysteresis close to room temperature. Differential scanning calorimetry and cross polarized microscopy are used to show that the magnetic switching aligns with a material change from solid to ordered liquid phase on warming.
Anthony J. Fitzpatrick, Paulo N. Martinho, Brendan J. Gildea, John D. Holbrey, Grace G. Morgan
Eur. J. Inorg. Chem., December 16, 2015, DOI: 10.1002/ejic.201501335. Read article.
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).
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.
Phosphoric acid and calcium nitrate self-assemble into lyotropic liquid crystalline mesophases that can be calcined into sponge-like transparent mesoporous thin films of calcium hydroxyapatite.
Ebrima Tunkara, Ömer Dag
Eur. J. Inorg. Chem., December 2, 2015, DOI: 10.1002/ejic.201501116. Read article.