Liquid crystalline self-assembly of azulene–thiophene hybrids and their applications as OFET materials

Abstract

Orientational control within thin films is crucial for the preparation of organic field effect transistors (OFETs). The highly ordered liquid crystalline smectic E phase (SmE) is known as a powerful...

Tailoring liquid crystalline self-assembly and de Vries behavior of azulenes via lateral and core substitution

“…22 We could recently show that the soft crystal E phase (SmE) of calamitic thiophene-azulene hybrids can be used to manufacture well-orientated and molecularly thin films. 23 Previously, we established the 2-phenyl azulene core as a potent de Vries promoting element (Fig. 1(b), 12O-AzCN-PhO12).…”

“…22 We could recently show that the soft crystal E phase (SmE) of calamitic thiophene–azulene hybrids can be used to manufacture well-orientated and molecularly thin films. 23…”

First azulene liquid crystal with de Vries behavior and a SmA re-entrant phase

“…Therefore, the soft crystalline SmE appears frequently in those systems. [32][33][34] We recently described a series of 2-bromo-6-alkyloxyazulenes nO-Az-Br forming those highly ordered SmE phases. 32 From these results we anticipated that lateral substitution at the azulene moiety should reduce the order within the layers while preserving the translational order induced by the phenyl azulene core (Fig.…”