Syntheses and Characterization of Chiral Branched-Arm Liquid Crystals-Basing on Isosorbide as Chiral Core

Abstract:

A new series of two-arm (MB1, MB2), four-arm (MB3), six-arm (MB4) chiral liquid crystalline compound containing isosorbide as chiral core were first synthesized. Four precursors of branched-arm B1~B4 were obtained at first and then were esterized separately with isosorbide and got four chiral branched-arm liquid crystals (MB1~MB4). The chemical structures and LC properties of the liquid crystalline molecule were measured by spectrum and thermal analysis techniques. XRD curves of MB1~MB4 samples only showed broad peaks at wide-angle, but no sharp peak was seen for all the samples. The results showed that MB1~MB4 appeared cholesteric phase with oily streak texture or lined texture and finger print texture. Isosorbide successfully induced cholesteric phase. The values of melting point and clearing point for MB1~MB4 decreased. The quantity of branched-arm and chiral core had effects on their liquid crystalline properties.

• Periodical: Advanced Materials Research (Volumes 750-752)
• Pages: 1203-1206
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.750-752.1203
• Online since: August 2013
• Authors: Xiao Zhi He, Li Jiao Zhang, Guang Yu Li, Mei Tian, Ying Gang Jia
• Keywords: Branched-Arm, Chiral, Cholesteric, Synthesis

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