title: Perhydroazulene-based liquid-crystalline materials with smectic phases.
abstract: New liquid-crystalline materials with a perhydroazulene core were synthesized and the stereochemistry of these compounds was investigated. The mesomorphic properties of the new LC compounds were investigated by differential scanning colorimetry, polarizing optical microscopy and X-ray diffraction. We report here on the LC properties of nonchiral materials, which predominantly exhibit smectic phases and display nematic phases only within narrow temperature ranges. The dependence of the mesogenic behavior of the new materials on the stereochemistry of the core system was also investigated. All newly synthesized compounds were fully characterized by the usual spectroscopic and analytical methods.
authors.affiliation: Institut für Organische Chemie, Technische Universität Braunschweig, Hagenring 30, 38106 Braunschweig, Germany.
authors.forename: Zakir
authors.initials: Z
authors.lastname: Hussain
authors.forename: Henning
authors.initials: H
authors.lastname: Hopf
authors.forename: S Holger
authors.initials: SH
authors.lastname: Eichhorn