title: Frustrated smectic layer structures in bent-shaped dimer liquid crystals studied by x-ray microbeam diffraction.
abstract: The layer structures in bent-shaped liquid crystal dimers mOAM5AMOm (m=6-16) have been investigated by x-ray microbeam diffraction. These liquid crystal molecules have two rodlike mesogens connected with an odd-numbered alkylene spacer and form a bent shape. In these compounds it is found that the structure changes from the single (m=6) to frustrated-layer structures (m=8, 10, and 12) and switchable frustrated-layer structures (m=14 and 16) with increasing terminal chain length. An anticlinic antiferroelectric structure is suggested in the compound with m=16, based on the different electric-field-induced reorientation behavior from those in the other dimers.
authors.affiliation: Department of Organic and Polymeric Materials, Tokyo Institute of Technology, O-okayama, Meguro-ku, Tokyo 152-8552, Japan.
authors.forename: Yoichi
authors.initials: Y
authors.lastname: Takanishi
authors.forename: Megumi
authors.initials: M
authors.lastname: Toshimitsu
authors.forename: Michi
authors.initials: M
authors.lastname: Nakata
authors.forename: Naoki
authors.initials: N
authors.lastname: Takada
authors.forename: Tatsuya
authors.initials: T
authors.lastname: Izumi
authors.forename: Ken
authors.initials: K
authors.lastname: Ishikawa
authors.forename: Hideo
authors.initials: H
authors.lastname: Takezoe
authors.forename: Junji
authors.initials: J
authors.lastname: Watanabe
authors.forename: Yumiko
authors.initials: Y
authors.lastname: Takahashi
authors.forename: Atsuo
authors.initials: A
authors.lastname: Iida