Tubular mesophases: liquid crystals consisting of macrocyclic molecules

Abstract

The hexa-(p-n-dodecyloxybenzoyl) derivatives (1 b), (2b), and (3b) of the macrocyclic polyamines [I 8]-N6, [24]-N602, and [27]-N603 display a liquid crystal phase in which the macrocyclic units are stacked, forming a tubular mesophase.

Funktionelle flüssigkristalline Aggregate: selbstorganisierte weiche Materialien

“…[227] Ionische Flüssigkeiten sind vielversprechend für den Einsatz in elektrochemischen Bauelementen, als Lösungsmittel und in der Katalyse. [243][244][245] [237,[246][247][248] Azakronenethern [249] oder Poly(ethylenoxid) [250] synthetisiert, es konnte jedoch keine anisotrope, eindimensionale Ionenleitfähigkeit festgestellt werden. Die Ionenleitfähigkeit dieser Materialien sollte gering sein, da die flüssigkristallinen Strukturen nicht makroskopisch orientiert wurden und somit keine langreichweitigen Leitungswege entstanden.…”

Highly oriented fibres of copper laurate obtained by melt-spinning of its columnar mesophase

“…The degree of orientation may not be as high as that obtained by some of the previously described techniques [7,8], but a significant improvement of the present method is its simplicity and the ease of obtention of large amounts (grams !) of oriented samples.…”

“…Several alignment techniques including use of a magnetic field [4], various surface treatments [5], slow flow through a capillary [6], or stretching of the mesophase [7] have resulted in limited degrees of alignment. A process employing a mechanically operated pin which draws a strand from a reservoir cup of the mesogen at a desired temperature in the columnar phase has recently been shown to give highly oriented fibres [8].…”

Possibility of Hydrogen Bonding Between Molecules of Pentyl Ester of p-(N-α-D-Glucopyranoside)Aminobenzoic Acid

“…Причем дополнительное упорядочение компонентов систем за счет водородных связей может привести к появлению новых уникальных свойств [7][8][9].…”