Birefringence and Orientation Direction Control of Photoalignable Liquid Crystalline Copolymer Films Based on In Situ Modification of Mesogenic Groups

被引：1

作者：

Uemura, Keigo ^{[1
]}

Nakajima, Gento ^{[1
]}

Marui, Madoka ^{[1
]}

Kondo, Mizuho ^{[1
]}

Sakamoto, Moritsugu ^{[2
]}

Sasaki, Tomoyuki ^{[2
]}

Suzuki, Masato ^{[2
]}

Ono, Hiroshi ^{[2
]}

Kawatsuki, Nobuhiro ^{[1
]}

机构：

[1] Univ Hyogo, Grad Sch Engn, Dept Appl Chem, Himeji 6712280, Japan

[2] Nagaoka Univ Technol, Dept Elect Engn, Nagaoka 9402188, Japan

来源：

LANGMUIR | 2024年 / 40卷 / 29期

关键词：

PHOTOINDUCED REORIENTATION; POLARIZATION GRATINGS; POLYMER-FILMS; ALIGNMENT; AZOBENZENE; PHOTOREDUCTION; SUBSTITUENT; HOLOGRAMS; MECHANISM; PHASE;

D O I：

10.1021/acs.langmuir.4c01821

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Controlling the birefringence of optical films is imperative to fabricate thin birefringent optical devices. Here, new photoalignable liquid crystalline copolymers (PLCPs) with 4-formylphneyl benzoate (PA) and cinnamic acid (CA) side groups are synthesized, which attain high photoreactivity and controllability of the orientation direction. Additionally, the exposed films are treated with 2-aminofluorene (AF) for an in situ condensation of PA with AF to form a Schiff base with a high inherent birefringence. Birefringence of the photoaligned film can be controlled up to 0.45 without disturbing the photoinduced orientation structure.

引用

页码：15271 / 15280

页数：10

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