6533b7cffe1ef96bd125834b
RESEARCH PRODUCT
Triphenanthro‐anellierte [18]Annulene mit Alkoxy‐Seitenketten — Eine neue Klasse discotischer Flüssigkristalle
Herbert MeierHeinz KolshornHolger KretzschmannDieter SchollmeyerKlaus Peter Müllersubject
Inorganic Chemistrychemistry.chemical_classificationCrystallographyPolycyclic compoundChemistryStereochemistryLiquid crystalDiscotic liquid crystalAlkoxy groupSide chainMoleculeCrystal structureAnnulenedescription
Triphenanthro-Anellated [18]Annulenes with Alkoxy Side Chains - A Novel Class of Discotic Liquid Crystals Two different types 6 and 16 of [18]annulenes condensed with phenanthrene systems were prepared by cyclocondensation reactions (Schemes 2 and 3). The central 18-membered rings do not show a macrocyclic diamagnetic ring current. Conformational analyses and X-ray analyses in the solid state reveal non-planar structures in which aromatic “islands” are connected by (E)-configurated olefinic bridges. The introduction of long alkoxy side chains yields a new class of discotic liquid crystals; either ND or hexagonal columnar phases are generated, which were characterized by DSC, microscopy with polarized light, and small-angle scanning X-ray.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1994-09-01 | Chemische Berichte |