Flüssig-kristalline Verbindungen aus der Thiophenreihe, Teil 4. Azomethine und Vinylene mit zentralen Azobenzol-, Stilben- und 1,2-Di(2-thienyl)ethylen-Einheiten / Liquid Crystalline Compounds in the Thiophene Series, Part 4. Azomethines and Vinylenes with Central Azobenzene, Stilbene and 1,2-Di(2-thienyl)ethylene Moieties

Abstract

Abstract Azomethines and vinylenes, containing azobenzene, stilbene or 1,2-di(2-thienyl)ethylene moieties as central groups with additional thiophene systems has been synthesized and charac-terized by their elemental analyses, IR and 1H NMR spectra and studied in relation to their liquid crystalline properties by DTA analysis and visually by their textures microscoping under polarized light. The liquid crystalline properties of these compounds and some related compounds described in literature are compared and the geometrical elements of their structures are discussed.