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Synthesis of Schiff Base-type Liquid Crystalline Crown Ethers Containing Dibenzo-18-Crown-6 Unit

✍ Scribed by Shu-Yuan Zhang; Ke-Ke He; Shi-Jun Zheng; Si-Fu Tang; Xiao-Jing Zhang; Zi-Fa Li

Publisher: John Wiley and Sons
Year: 2010
Tongue: English
Weight: 539 KB
Volume: 22
Category: Article
ISSN: 0256-7660
DOI: 10.1002/cjoc.20040220415

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✦ Synopsis

Abstract

The synthesis and characterization of novel Schiff base liquid crystalline crown ethers prepared from the intermediates 4‐(4′‐alkoxylbiphenyl‐4‐carbonyl) benzaldehyde, cis‐ and trans‐4,4′‐diaminodibenzo‐18‐crown‐6 are described. The structure of these compounds have been well characterized by elemental analysis, IR, ^1^H NMR and MS spectroscopy. The liquid‐crystalline behavior of these compounds was also investigated by differential scanning calorimetry (DSC), polarizing optical microscopy (POM) with a heating stage and polarimetric analysis.

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