title: Design, synthesis and evaluation of new fluorinated liquid crystals bearing a CF2CF2fragment with negative dielectric anisotropy.
abstract: We designed unique negative dielectric molecules, which were tricyclic compounds with a 5,5,6,6-tetrafluorocyclohexa-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.
authors.affiliation: Faculty of Molecular Chemistry and Engineering, Kyoto Institute of Technology, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan. konno@kit.ac.jp.
authors.forename: Shigeyuki
authors.initials: S
authors.lastname: Yamada
authors.affiliation: Faculty of Molecular Chemistry and Engineering, Kyoto Institute of Technology, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan. konno@kit.ac.jp.
authors.forename: Shohei
authors.initials: S
authors.lastname: Hashishita
authors.affiliation: AGC Seimi Chemical Co., Ltd., Chigasaki 3-2-10, Chigasaki-city, Kanagawa 253-0041, Japan.
authors.forename: Tomoyuki
authors.initials: T
authors.lastname: Asai
authors.affiliation: Faculty of Molecular Chemistry and Engineering, Kyoto Institute of Technology, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan. konno@kit.ac.jp.
authors.forename: Takashi
authors.initials: T
authors.lastname: Ishihara
authors.affiliation: Faculty of Molecular Chemistry and Engineering, Kyoto Institute of Technology, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan. konno@kit.ac.jp.
authors.forename: Tsutomu
authors.identifier: http://orcid.org/0000-0002-5146-9840
authors.initials: T
authors.lastname: Konno