Enhanced columnar mesophase range through distortions in arene cores. (24th March 2017)

• Record Type: Journal Article
• Authors: Vollbrecht, Joachim; Wiebeler, Christian; Schumacher, Stefan; Bock, Harald; Kitzerow, Heinz
• Is Part Of: Molecular crystals and liquid crystals. Volume 646(2017)
• Page Start: 66
• Page End: 73
• Publication Date: 2017-03-24
• Subjects: Axial Chirality -- Discotic Liquid Crystals -- Distorted Arene Cores -- Mesophase Stabilization -- Organic Electronics -- Perylene Derivatives; Molecular crystals -- Periodicals; Liquid crystals -- Periodicals; Liquid crystals; Molecular crystals; Periodicals; 548
• DOI: 10.1080/15421406.2017.1284387
• Languages: English
• ISSNs: 1542-1406

Abstract

ABSTRACT: The influence of sterically hindered functional groups on liquid crystalline properties is studied for two series of perylene-3, 4, 9, 10-tetracarboxylic tetraesters and diimides. The results indicate an enhanced mesophase range owing to the decrease of the melting temperature. The role of axial chirality is also studied by comparing the liquid crystalline properties of unilaterally and bilaterally extended perylene derivatives. In summary, both bulky substituents and distortion of the polycyclic aromatic core can lead to an enlarged temperature range of columnar mesophases.