High birefringence and large negative dielectric anisotropy phenyl-tolane liquid crystals

Dopant-Enhanced Vertical Alignment of Negative Liquid Crystals

A simple method for achieving high-contrast vertical alignment of high birefringence (Dn 0.28) negative dielectric anisotropic liquid crystal mixture using buffed polyimide substrates is demonstrated. By doping a positive, or non-polar dielectric anisotropic compound or mixture to the laterally difluorinated tolane liquid crystal host, an excellent vertical alignment was obtained. This alignmen...

Low mid-infrared absorption tolane liquid crystals terminated by 2,2-difluorovinyloxyl: synthesis, characterization and properties

The synthesis and characterization of new 2,2-difluorovinyloxyl terminated tolane liquid crystals are reported. The mesomorphic properties, mid-wave infrared (MWIR) absorption and birefringence were investigated. The results show that these materials exhibit low absorption loss, a wide nematic phase range, a low melting point and high birefringence. The influences of fluorine substitution and t...

High birefringence phenyl tolane positive compounds for dual frequency liquid crystals

High birefringence lateral difluoro phenyl tolane liquid crystals

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High birefringence and low viscosity negative dielectric anisotropy liquid crystals

High birefringence and low viscosity negative dielectric anisotropy liquid crystals Sebastian Gauza a; Meizi Jiao a; Shin-Tson Wu a; Przemysaw Kula b; Roman Dbrowski b; Xiao Liang c a College of Optics and Photonics, University of Central Florida, Orlando, FL 32816, USA b Institute of Chemistry, Military University of Technology, 00-908 Warsaw, Poland c Department of Chemistry, Tsinghua Univers...