Takanishi Y, Toshimitsu M, Nakata M, Takada N, Izumi T, Ishikawa K, Takezoe H, Watanabe J, Takahashi Y, Iida A. Frustrated smectic layer structures in bent-shaped dimer liquid crystals studied by x-ray microbeam diffraction.
PHYSICAL REVIEW. E, STATISTICAL, NONLINEAR, AND SOFT MATTER PHYSICS 2006;
74:051703. [PMID:
17279922 DOI:
10.1103/physreve.74.051703]
[Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/16/2005] [Revised: 06/18/2006] [Indexed: 05/13/2023]
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.
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