Novel Discotic Boroxines: Synthesis and Mesomorphic Properties

Materials

Tobias Wöhrle¹  Angelika Baro¹ 

[1] Institut für Organische Chemie, Universität Stuttgart, Pfaffenwaldring 55, Stuttgart D-70569, Germany;

关键词: boroxines;    liquid crystals;    columnar;    synthesis;   

DOI  :  10.3390/ma7054045

来源: mdpi

【 摘 要 】

A new synthetic approach to highly substituted triphenylboroxines 11 is described. Their mesomorphic properties were investigated by differential scanning calorimetry (DSC), polarizing optical microscopy (POM) and X-ray diffraction (SAXS, WAXS). The tris(3,4,5-trialkyloxy)phenyl functionalized derivatives 11b–e showed broad mesophases for a minimum alkyl chain length of C9. The phase widths ranged from 110 K to 77 K near room temperature, thus decreasing with enhanced alkyl chain lengths. Textures observed under POM indicated a columnar hexagonal (Col_h) mesophase symmetry that was confirmed by X-ray diffraction experiments.

【 授权许可】

CC BY   
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