Novel sulphur-containing banana-shaped liquid crystal molecules |
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| Authors: | G Heppke D D Parghi H Sawade |
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| Institution: | 1. M. Smoluchowski Institute of Physics, Jageillonian University, Reymonta 4, 30-059 Cracow, Poland;2. H. Niewodniczański Institute of Nuclear Physics, Radzikowskiego 152, 31-342 Cracow, Poland;3. Institute of Physical Chemistry II, Ruhr University, D-44780 Bochum, Germany;4. Institute of Chemistry, Military University of Technology, 00-908 Warsaw, Poland |
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| Abstract: | In this preliminary report we present the mesomorphic properties and electro-optic investigations of three new 'banana-shaped' mesogens. The materials are structurally similar to Niori's the original bent-core materials but possess alkylthio substituents in place of alkoxy substituents. Microscopic investigations revealed an unusual 'spiral-domain texture', similar to that observed in the 'B7' phase of related materials. Further investigations support our earlier observations that the materials display antiferroelectric switching in this phase, in two of the new materials studied. The nature of this phase, in comparison with the 'switchable' (B2) and 'chiral-domain' (B4) phases of the original materials, is discussed. |
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| Keywords: | polymer dispersed liquid crystal UV-initiated cationic polymerisation epoxy resins electro-optical properties |
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