Stabilization and optical switching of liquid crystal blue phase doped with azobenzene-based bent-shaped hydrogen-bonded assemblies
Stabilization and optical switching of liquid crystal blue phase doped with azobenzene-based bent-shaped hydrogen-bonded assemblies
复制标题
偶氮苯基弯曲形氢键组件掺杂液晶蓝相的稳定性和光开关
DOI：
10.1039/c5ra12256b
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发表时间：
2015-08
期刊：
影响因子：
3.9
通讯作者：
Guo Jinbao
中科院分区：
文献类型：
--
作者：
Wang Jiao;Shi Yang;Yang Kuan;Wei Jie;Guo Jinbao
我们开发了一种新型的“U”形氢键组装体（H-bonded assemblies）来稳定液晶蓝相（LC-BPs）并对BPs的布拉格反射带进行光开关。在这里，氢键组装简单地组装质子受体偶氮苯介晶基团和二酸质子供体。通过氢键组装掺杂剂显著拓宽了LC样品的BP温度范围，并且最宽的BP温度范围为16.7 °C。此外，BPs的低温非常接近室温。此外，在紫外光照射下，在掺杂有氢键组装体的LC样品中观察到布拉格反射带的蓝移，相应的反射颜色从绿色到蓝色。BPs的稳定性和光开关的相关物理机制可能分别与氢键组装体的“S”形分子几何结构和氢键组装体中偶氮苯部分的光异构化有关。这项工作开辟了一种方法来设计自组织分子适用于光学调谐BP显示器和其他光子器件。
We develop a new kind of bent-shaped hydrogen-bonded assemblies (H-bonded assemblies) to stabilize liquid crystal blue phases (LC-BPs) and optically switch the Bragg reflection band of BPs. Here the H-bonded assemblies are simply assembled with the proton acceptor containing azobenzene mesomorphic group and diacid proton donors. The BPs temperature ranges of the LC samples are significantly widened by H-bonded assembly dopants, and the widest BP temperature range is 16.7 °C. Moreover, the lower temperature of BPs is very close to room temperature. Additionally, a blue-shift of the Bragg reflection bands with the corresponding reflection color from green to blue is observed in the LC sample doped with H-bonded assemblies upon UV light irradiation. The related physics mechanisms for the stabilization and optical switching of BPs may be contributing to the bent-shaped molecular geometry of H-bonded assemblies and photoisomerization of azobenzene moiety in H-bonded assemblies, respectively. This work opens up a way to design self-organized molecules suitable for optically tuning BP display and other photonic devices.
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影响因子：
2.2
作者：
Yutaro Kogawa;A. Yoshizawa
通讯作者：
Yutaro Kogawa;A. Yoshizawa
影响因子：
3.4
作者：
Nordendorf, G.;Hoischen, A.;Kitzerow, H. -S.
通讯作者：
Kitzerow, H. -S.
影响因子：
3.3
作者：
Zheng, Zhigang;Shen, Dong;Huang, Pei
通讯作者：
Huang, Pei
DOI：
10.1021/jp907360c
发表时间：
2009-10
期刊：
The journal of physical chemistry. B
影响因子：
--
作者：
Ling-yung Wang;I. Chiang;Po-Jen Yang;Wan-Sheung Li;I. Chao;Hong‐Cheu Lin
通讯作者：
Ling-yung Wang;I. Chiang;Po-Jen Yang;Wan-Sheung Li;I. Chao;Hong‐Cheu Lin
DOI：
10.1021/jp506358h
发表时间：
2014-08
期刊：
The journal of physical chemistry. B
影响因子：
--
作者：
K. Kishikawa;T. Sugiyama;Tomohiro Watanabe;Shota Aoyagi;Michinari Kohri;T. Taniguchi;Masahiro Takahashi;S. Kohmoto
通讯作者：
K. Kishikawa;T. Sugiyama;Tomohiro Watanabe;Shota Aoyagi;Michinari Kohri;T. Taniguchi;Masahiro Takahashi;S. Kohmoto