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Glassy Cholesteric Liquid Crystals Containing Menthyl Groups Demonstrating Tunable Visible Reflection with Temperature and Reflection Angle Dual‐Mode

Glassy Cholesteric Liquid Crystals Containing Menthyl Groups Demonstrating Tunable Visible... Responsive dual‐modal cholesteric liquid crystal (CLC) optical materials demonstrating tunable optical behaviors possess significant application in optical devices. Introducing chiral groups into liquid crystal structures is a common strategy. The design of CLC optical structure by two identical menthyl elements is seldom reported. Herein, novel CLC oligomers (Gn) combining 4‐(4‐(4‐menthyloxy‐4‐oxobutanoyloxy)benzoyloxy)phenyl 4‐allyloxybenzoate (M1) and 4′‐(4‐menthyloxy‐4‐oxobutanoyloxy)biphenyl‐4‐yl 4‐allyloxybenzoate (M2) on organosilicon oligomers by molecular grafting are proposed. The as‐prepared oligomers Gn display brilliant visible light reflection in the chiral nematic (N*) phase. And when the oligomers Gn are rapidly cooled from the N* temperature to below 0 °C, the reflection color on the glassy CLC oligomers can be preserved at room temperature over 1 year. Furthermore, the glassy Gn present dual‐mode thermochromic performances, the blue (or red)‐shift reflection with the increase of temperature, and the blue‐shift reflection with the increase of reflection angle. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Macromolecular Materials and Engineering Wiley

Glassy Cholesteric Liquid Crystals Containing Menthyl Groups Demonstrating Tunable Visible Reflection with Temperature and Reflection Angle Dual‐Mode

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References (1)

Publisher
Wiley
Copyright
© 2022 Wiley‐VCH GmbH
ISSN
1438-7492
eISSN
1439-2054
DOI
10.1002/mame.202100594
Publisher site
See Article on Publisher Site

Abstract

Responsive dual‐modal cholesteric liquid crystal (CLC) optical materials demonstrating tunable optical behaviors possess significant application in optical devices. Introducing chiral groups into liquid crystal structures is a common strategy. The design of CLC optical structure by two identical menthyl elements is seldom reported. Herein, novel CLC oligomers (Gn) combining 4‐(4‐(4‐menthyloxy‐4‐oxobutanoyloxy)benzoyloxy)phenyl 4‐allyloxybenzoate (M1) and 4′‐(4‐menthyloxy‐4‐oxobutanoyloxy)biphenyl‐4‐yl 4‐allyloxybenzoate (M2) on organosilicon oligomers by molecular grafting are proposed. The as‐prepared oligomers Gn display brilliant visible light reflection in the chiral nematic (N*) phase. And when the oligomers Gn are rapidly cooled from the N* temperature to below 0 °C, the reflection color on the glassy CLC oligomers can be preserved at room temperature over 1 year. Furthermore, the glassy Gn present dual‐mode thermochromic performances, the blue (or red)‐shift reflection with the increase of temperature, and the blue‐shift reflection with the increase of reflection angle.

Journal

Macromolecular Materials and Engineering – Wiley

Published: Jan 1, 2022

Keywords: glassy cholesteric liquid crystals; reflection angles; temperatures; tunable visible reflections

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