UV-Induced Stable Planar Alignment of Nematic Liquid Crystals Using a Polypropyleneimine Dendrimer Having a Mesogen Consisting of Cinnamate and Azobenzene Moieties

被引：8

作者：

Haba, Osamu ^{[1
]}

Itabashi, Hiroki ^{[1
]}

Sato, Syun ^{[1
]}

Machida, Keisuke ^{[1
]}

Koda, Tomonori ^{[1
]}

Yonetake, Koichiro ^{[1
]}

Kwak, Musun ^{[2
]}

Momoi, Yuichi ^{[3
]}

Kim, Nakwon ^{[2
]}

Hong, Sangpyo ^{[2
]}

Kang, Dongwoo ^{[2
]}

Choi, Youngseok ^{[2
]}

机构：

[1] Yamagata Univ, Grad Sch Sci & Engn, Yonezawa, Yamagata 9928510, Japan

[2] LG Display Co Ltd, Proc Dev Div, Paju Si, Gyeonggi Do, South Korea

[3] LG Display Co Ltd, Japan Lab, Shinagawa Ku, Tokyo, Japan

来源：

MOLECULAR CRYSTALS AND LIQUID CRYSTALS | 2015年 / 610卷 / 01期

关键词：

dendrimer; UV irradiation; azobenzene; planar alignment; cinnamate; HOMEOTROPIC ORIENTATION;

D O I：

10.1080/15421406.2015.1026737

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

A liquid crystalline dendrimer having a cinnamate mesogen containing an azobenzene moiety (D-6AC2) was prepared as an alignment agent of nematic liquid crystals for a planar homogeneous alignment. D-6AC2 is a thermotropic liquid crystal showing smectic phases. A mixture of ZLI-4792 with 1wt% of D-6AC2 exhibited a homeotropic alignment. After UV irradiation of the same sample, the schlieren texture due to a planar orientation was observed, and the texture was maintained even after 133days. Thus D-6AC2 can induce the stable planar alignment of NLC upon UV irradiation. Furthermore, D-6AC2 could induce a planar homogeneous alignment by polarized UV light irradiation.

引用

页码：201 / 209

页数：9