Design, synthesis and evaluation of new fluorinated liquid crystals bearing a CF2CF2 fragment with negative dielectric anisotropy

作者：Yamada Shigeyuki; Hashishita Shohei; Asai Tomoyuki; Ishihara Takashi; Konno Tsutomu^*

来源：Organic and Biomolecular Chemistry, 2017, 15(6): 1495-1509.

DOI：10.1039/c6ob02431a

We designed unique negative dielectric molecules, which were tricyclic compounds with a 5,5,6,6-tetra-fluorocyclohexa-1,3-diene moiety in the mesogen, and then for the first time developed an effective synthetic protocol from commercially available 4-bromo-3,3,4,4-tetrafluorobut-1-ene. We also evaluated their physical properties for new mesogenic compounds, such as birefringence, dielectric anisotropy and shear viscosity, which are important characteristics for flat LC display device applications. The molecules clearly showed not only a large negative dielectric anisotropy and birefringence but also high viscosity.

• 出版日期2017