ジオールの化学修飾によるコレステリック液晶の発現と固定化

抄録

In this presentation, we report on synthesis and cholesteric liquid crystal (CLC) features of alkane diol derivatives tethering two cholesteryl units at their terminal positions (Cn-DiCh). An ethylene glycol derivative (C2-DiCh) cell showed a Bragg reflection band in a wavelength range from 620 nm to 780 nm by stepwise cooling from 142 °C to 125 °C. We serendipitously found that some of Cn-DiCh cells annealed at CLC temperatures are supercooled to 0 °C, whereupon the reflection wavelength can be preserved even at room temperature. Such supercooling treatment resulted in durable formation of a glassy CLC solid-state without the aid of any covalent bonding.