| 1 | Author | V. Vill, J. Thiem | Requires cookie* |
| Title | Flüssigkristalle mit monosubstituierten alicyclischen und heteroalicyclischen Ringen Liquid Crystals Derived from Mono-Substituted Alicyclic and Heteroalicyclic Rings  | ||
| Abstract | Twenty two liquid crystalline mono-substituted cyclopentanes and cyclohexanes including their oxygen analogues were prepard and studied. Smectic phases with clearing temperatures 5^80 °C were observed, and these do not differ considerably between the esters of the more flexible five-mem-bered ring derivatives and those of the conformationally more rigid six-membered rings. In case of the latter, decreasing clearing points ar observed with increasing ratios of the axial conformation (static conformational effect). Altogether rather low clearing points are observed, which may be interpreted by a dynamic conformational effect owing to which fast ring inversion causes the compounds to appear in a bulkier shape, and this results in a disadvantageous packing in the mesophase. | ||
| Reference | Z. Naturforsch. 45a, 1345—1348 (1990); eingegangen am 21. Oktober 1990 | ||
| Published | 1990 | ||
| Keywords | Alicyclic rings, Liquid crystals, Conformation, Oxygen heterocycles | ||
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