Soft supramolecular triangles: The molecule shown displays a new liquid‐crystalline phase formed by a periodic array of triangular cylinders. The cylinders are fused to form a honeycomb by hydrogen‐bonding networks running along the vertices, and the cells are filled by molten alkyl chains. The thickness of the walls separating the compartments is equal to the width of the π‐conjugated rods.

Weiche supramolekulare Dreiecke: Das gezeigte Molekül bildet eine neue flüssigkristalline Phase mit periodisch angeordneten dreieckigen Zylindern. Die Zylinder sind über ein H‐Brücken‐Netzwerk entlang der Ecken zu einer Wabenstruktur kondensiert, und die Zellen sind mit geschmolzenen Alkylketten gefüllt. Die Dicke der Wände zwischen den Kompartimenten entspricht dem Querschnitt der π‐konjugierten Stäbe.

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3-Alkyl-2,5-bis[p-(hexa-2,4-dienoyloxy)phenyl]-thiophene derivatives were synthesized by using Kumada coupling and Suzuki coupling reactions as key steps. The thermotropic liquid crystalline behavior of these compounds was investigated by optical polarized microscopy, monotropic nematic mesophases were observed in such compounds.

Thiophene derivatives R 0090 Synthesis and Mesomorphic Behavior of 3-Alkyl-2,5-bis[p-(hexa-2,4-dienoyloxy)phenyl]-thiopheneDerivatives. -Starting from the dibromide (I), a very efficient approach to the title derivatives is presented. The thermotropic liquid crystalline behavior of the compounds such as (VI) is investigated. Monotropic nematic mesophases are observed. -(CHENG*, X.-H.; DONG, X.; ZHENG, T.; YE, H.; WEI, G.-H.; Chin.