Visible Light and Temperature Regulated Reflection Colors in Self-supporting Cholesteric Liquid Crystal Physical Gels

Dong-Xu Zhao; Qian Jiang; Jing Wang; Yuan Qiu; Yong-Gui Liao; Xiao-Lin Xie

doi:10.1007/s10118-021-2618-8

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Visible Light and Temperature Regulated Reflection Colors in Self-supporting Cholesteric Liquid Crystal Physical Gels

ARTICLE | Updated：2021-07-30

- Visible Light and Temperature Regulated Reflection Colors in Self-supporting Cholesteric Liquid Crystal Physical Gels
- Visible Light and Temperature Regulated Reflection Colors in Self-supporting Cholesteric Liquid Crystal Physical Gels
- Chinese Journal of Polymer Science 2021年39卷第12期页码：1617-1625
- Affiliations：
  
  a.Key Laboratory of Material Chemistry for Energy Conversion and Storage, Ministry of Education, Hubei Engineering Research Center for Biomaterials and Medical Protective Materials, Hubei Key Laboratory of Materials Chemistry and Service Failure, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
  b.State Key Laboratory of Material Processing and Die & Mould Technology, Huazhong University of Science and Technology, Wuhan 430074, China
- Author bio：
  
  wukong.s@163.com (Y.Q.)
  ygliao@mail.hust.edu.cn (Y.G.L.)
- Funds：
  
  This work was financially supported by the National Natural Science Foundation of China (Nos. 51973072 and 51773070) and the Innovation and Talent Recruitment Base of New Energy Chemistry and Device (No. B21003). We also thank the HUST Analytical and Testing Center for HPLC and SEM measurements.
- DOI：10.1007/s10118-021-2618-8
  中图分类号：
- 收稿：2021-05-10，
  
  修回：2021-6-5，
  
  录用：2021-6-9，
  
  网络首发：2021-07-30，
  
  纸质出版：2021-10-18
- Accepted：
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Zhao, D. X.; Jiang, Q.; Wang, J.; Qiu, Y.; Liao, Y. G.; Xie, X. L. Visible light and temperature regulated reflection colors in self-supporting cholesteric liquid crystal physical gels. Chinese J. Polym. Sci. 2021, 39, 1617–1625

Dong-Xu Zhao, Qian Jiang, Jing Wang, et al. Visible Light and Temperature Regulated Reflection Colors in Self-supporting Cholesteric Liquid Crystal Physical Gels[J]. Chinese Journal of Polymer Science, 2021, 39(12): 1617-1625.
Zhao, D. X.; Jiang, Q.; Wang, J.; Qiu, Y.; Liao, Y. G.; Xie, X. L. Visible light and temperature regulated reflection colors in self-supporting cholesteric liquid crystal physical gels. Chinese J. Polym. Sci. 2021, 39, 1617–1625 DOI： 10.1007/s10118-021-2618-8.

Dong-Xu Zhao, Qian Jiang, Jing Wang, et al. Visible Light and Temperature Regulated Reflection Colors in Self-supporting Cholesteric Liquid Crystal Physical Gels[J]. Chinese Journal of Polymer Science, 2021, 39(12): 1617-1625. DOI： 10.1007/s10118-021-2618-8.

摘要

Abstract

Photo-responsive cholesteric liquid crystals (CLCs) have attracted much attention in recent years due to their wide applications in filters

tunable optical lasers

dynamic display devices

etc

. However

UV light is usually used as the external stimulus source

which is not environment-friendly enough. On the other hand

the mechanical properties of CLCs are not strong enough for these practical applications. Therefore

it still remains a challenge to endow the CLCs with visible light response and high mechanical properties at the same time. Herein

an axially chiral tetra-fluorinated binaphthyl azobenzene gelator (

S-4F-AG

) is synthesized. Upon 550 and 450 nm light irradiations

S-4F-AG

exhibits excellent photo-switchable behaviors. Notably

the maximum content of

cis

-isomer and its half-life are as high as 35% and 89 h in acetonitrile

respectively. A self-supporting CLC physical gel with a storage modulus around 10

Pa can be obtained when 3wt%

S-4F-AG

and 12wt% binaphthyl azobenzene derivative (dopant

) are co-doped into a nematic LC host P0616A. This CLC physical gel exhibits a temperature-driven blue

green

and red reflection colors reversibly. Importantly

such three primary RGB colors can also be realized by adjusting the exposure time of 550 nm green light. This work lays a solid foundation for the applications ranging from information storage to high-tech anticounterfeit.

关键词

Keywords

references

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